[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Vitaly]

https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/161 
after dong this I get alot of noise on start up

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

I just installed the alsa 1.0.20 driver on Jaunty and I now have a
digital microphone control again that actually works (at least in gnome-
sound-recorder - haven't tried Skype yet). Admittedly, I did it on the
weekly vanilla kernel build 2.6.30.rc3, but presumably it works with the
stock standard Jaunty kernel.

In case anyone else wants to try it, there are sample bash scripts to
download and build the drivers, eg at
http://www.antonywilliams.com/2007/10/bash-script-to-automate-compiling-
alsa.html, but note that you need to change it to get alsa 1.0.20 as the
example script is for 1.0.15. If you scroll down someone has posted a
mod that just downloads the latest alsa. Also, you need to change the
target folder for Jaunty's snd-hda-intel.ko in the alsa_2 script because
the sample script is for Gutsy. Instead, it should be:

cp -v /lib/modules/`uname -r`/kernel/sound/pci/hda/snd-hda-intel.ko
/lib/modules/`uname -r`/kernel/sound/pci/hda/snd-hda-intel.ko

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

There is now an even newer ppa that works better as it includes some bluez 
updates as well as the latest Alsa and Pulse. Also you can keep Ubuntu Desktop 
installed
Thanks to spitfire.
deb http://ppa.launchpad.net/mieszkoslusarczyk/ubuntu intrepid main #Bluez, 
Alsa, PulseAudio
deb-src http://ppa.launchpad.net/mieszkoslusarczyk/ubuntu intrepid main #Bluez, 
Alsa, PulseAudio

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

So, have you verified that this solves these new packages solve the
problem even with pulse installed and enabled?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

The new packages fix Intrepid's gnome-sound-recorder for me, but I can't
get skype to record anything. If I tell skype to use pulse, it thinks
it's recording when I do the test call, but plays back silence. The
other settings all result in a 'problem with audio capture' for me.

(An aside: In the latest Jaunty, I got skype working with a decent
recording level with the built-in sound packages just by telling it to
use pulse for everything. Jaunty's gnome-volume-control doesn't let you
set the output sound levels for PC and front speaker, so at first I got
no sound playback, but I used alsamixer to fix this.)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Bug Watch Updater]

** Changed in: pulseaudio
   Status: New => Unknown

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Peter]

If I do this:
1. Open Application -> Sound & Video -> PulseAudio Device Chooser
   2. Click on the "PulseAudio Applet" on the system tray and open "Manager".
   3. Click on the "Devices" tab, select 
"alsa_output.pci_8086_284b_sound_card_0_alsa_playback_0.monitor" which is the 
"Monitor Source of ALSA..."
   4. Click properties and set the volume to greater then 100%. 
   5. Play some music while you do step 4. above and you'll notice a volume 
increase.

But as we interested to increase the volume of the input sound I try in
step 3.


   3. Click on the "Devices" tab, select 
"alsa_input.pci_8086_284b_sound_card_0_alsa_capture.monitor" 
   4. Why is it not possible to set the volume greater then 100%  with 
alsa_input selected?

 Is this related to the low mic input?

see attached screen pic. Note the barely seen Pulse Audio volume meter
bars.

   
 


** Attachment added: "Screenshot-2.png"
   http://launchpadlibrarian.net/22991943/Screenshot-2.png

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Levy]

The solution of Marcus granado described in 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/275998/comments/109
works for me (ubuntu jaunty 9.04, computer Dell xpsM1330).
I can use skype and gnome-sound-recorder.
For skype it's a good solution but  for the sound-recorder, the micro is still 
a little low.

Thank you really much to Marcus.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Dustin McCoy]

Any information on how to do this workaround in KDE?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

Yay finally got a fix for my pulse problems in Intrepid.
The following was from a pulseaudioless M1330 system:
I added the following ppa to my sources:
~$ sudo nano /etc/apt/sources.list

deb http://ppa.launchpad.net/janvitus/ubuntu intrepid main
deb-src http://ppa.launchpad.net/janvitus/ubuntu intrepid main

Update the system in synaptic and selected pulseaudio and paman.
This installs the pulseaudio 0.9.13 and ALSA 1.0.18.

Then also installed paman using synaptic and ran the following from my startup 
session (these may already be there):
start-pulseaudio-x11
padevchooser

I then changed the sound config (attachment) to be autodetect or pulse.

At the terminal:
~$ asoundconf set-pulseaudio

Then I set skype to use all pulse.
I restarted the computer.
If the pickup is still weak then you can amplify using the PulseAudio Applet 
(should be in the notification area). The exact details will vary with the 
soundcard type
left click -> manager -> devices -> 
alsa_input.pci_284b_sound_card_0_alsa_capture_0
I currently have it set at 170%.

Kudos to  Gianvito Cavasoli for the ppa. 
https://launchpad.net/~janvitus/+archive
Only thing is I cannot install ubuntu desktop as libcanberra-gnome is removed.


** Attachment added: "Screenshot-Sound Preferences.png"
   http://launchpadlibrarian.net/21462248/Screenshot-Sound%20Preferences.png

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[John Pye]

Can someone involved in official Ubuntu packaging possibly give some
guidelines on the recommended minimal steps required to workaround this
bug on Intrepid? Since it sounds like it's going to be with us for a
while...

Are external packages really required? Is a solution with ALSA
preferred? Do I need to create an alsaboost device? Nothing seems to
work for me. EEEK!

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Artur Przychodzeń]

The same problem on HP Compaq 6720s, internal microphone not working, external 
microphone via line-in works just fine.
All volume controls maxed out, etc...  I read tons of posts on net related to 
this issue.

My variation of the bug is that every time when I enable the Capture
control on Recording tab (small microphone icon) in gnome volume
control, it is disabled when I open volume control again. So I just
can't enable it because it gets auto disabled.

My sound card:  Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03) AD198x

It's very strange that so MANY people struggle with this nasty bug and
still there is no fix for that.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

Due to some issues with the new gnome-volume-control, Jaunty has
reverted back to Intrepid's gnome-volume-control, and so this bug now
also applies to Jaunty. (You can adjust the digital mic sensivity via
PulseAudioManager, though.)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Pedro Villavicencio]

If there is not an opensuse bug to link to it makes no sense to have a
taks open for that, closing the opensuse task, feel free to reopen if
you have a link to the opensuse BTS to link to. thanks.

** Changed in: pulseaudio (openSUSE)
   Status: New => Invalid

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Vitaly]

The new gnome-volume-manager was in the first alpha but for some reason
is was pulled with really sucks.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

Do after discovering the paman fix, I got rid of the added asound.conf
file for the +50dB Mic device and the device no longer shows up in skype
etc...  However, I can't seem to get it from showing up in the gnome-
volume-control and /var/lib/alsa/asound.state  - how do I delete the
50dB MIC control from alsa so I am back at a prestine jaunty alsa
configuration?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

I just upgraded to jaunty and I tried that volume manager fix and it
worked. It still sounds horrible and almost unusable. It has been a year
already and nothing from pulseaudio side or alsa side have offered any
fix so far. The pusleaudio developer just seems like he really doesn't
care. Although he says the digitized data coming from the mic can be
boosted through the ui of pulseaudio, doesn't mean it fixes anything.
When just using alsa the digitized data seems to be just fine without
any "digital" boost. At least for me. Pulseaudio just seems to lose
something from grabbing that data from alsa. I at least hope I am wrong,
as I do not know too much about these systems, but if anybody really
knew that much more this problem would be fixed. Regarding how the
pulseaudio developer keeps dropping this bug, I just don't see this
getting fixed anytime soon. The only bet is to get rid of pulseaudio to
get any decent use out of the internal mic.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

I personally think the problem will be 'effectively fixed' as soon  as
ubuntu incorporates the new gnome-volume-manager that allows you to
increase the volume past %100 (as you can only do now in paman).  Does
anyone know if there is a PPA for the new manager somewhere?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

However using the pulseaudio boost workaround has problems for me on my
Dell M1330. It does boost the sound to an acceptable level it creates a
crazy lag in Skype. If you switch hw then the sound becomes very faint
again. So i for one am back to an ALSA only configuration. It works
perfectly well without pulseaudio. This all worked in Hardy and the mike
works well in ALSA so I really feel that this is pulse audio not
grabbing the correct ALSA settings.

Any news from the developers?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Treris]

Since kde 4.2 came out I've been using kubuntu (again, switched to gnome about 
18 months back) and there are no recording problemens here, it all basically 
works out of the box, even though pulseaudio is still installed because it's 
somehow needed to get sound working with flash movies in firefox.
The problem might therefore not even be pulseaudio, but the interaction between 
the gnome volume manager and pulseaudio. 
Hope this somehow helps pinpoint the problem.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

I was fairly miffed at the pulsepeople closing the bug and saying its
the HW issue. This is not good as it used to work in hardy and works
great in ALSA with no pulse; and dare I say it even Vista ;)

So I reopened the bug to try to get a better answer. Maybe people here
can lend a hand to get the volume of messages on this bug up and
something may get done. I for one am convinced the issue is with pulse.

Here is what I wrote:

#423: pulse audio breaks the microphone recording on Intel ICH7/8/9 chipsets
---+
  Reporter:  mabawsa   |   Owner:  lennart   
  Type:  defect|  Status:  reopened  
  Priority:  high  |   Milestone:
 Component:  libpulse  |Severity:  major 
Resolution:|Keywords:  Intel Microphone Recording
---+
Changes (by mabawsa):

  * status:  closed => reopened
  * resolution:  elsewhere =>


Comment:

 This all used to work in Ubuntu 8.04.
 Something changed to stop the digital amplification in ALSA being used
 when pulse is installed from Intrepid and Jaunty.
 Do you know what Lennart?

 ALSA also works incredibly well once pulseaudio is removed.
 So where is the resolution? The gnome-volume-control has been dropped by
 Jaunty. If I use pulse with Skype it creates massive lag rendering it
 useless. If I use hw microphone in Skype (the workaround for this) the
 microphone is faint and cannot be boosted.

 This is effecting many users and all paths lead to an issue with
 pulseaudio. So I have reopened the bug.
 Thanks for your effort on this, it would be nice to have pulseaudio
 working  as it looks like it is somewhat useful.

 mab

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

OK the developer at pulse closed the bug again and laid the blame on
ubuntu not implementing g-v-c. He also said I was misusing the bug
reporting system. So I guess nothing will be done after almost 8 months.
Anyway here is my last message:

#423: pulse audio breaks the microphone recording on Intel ICH7/8/9 chipsets
-+--
  Reporter:  mabawsa |   Owner:  lennart   
  Type:  defect  |  Status:  closed
 Milestone:  |   Component:  libpulse  
Resolution:  distrospecific  |Keywords:  Intel Microphone Recording
-+--

Comment(by mabawsa):

 Hi Lennart, I tried Fedora's live CD and it had exactly the same issues on
 my Dell M1330. The digital volume had no effect on ALSA. When I boosted
 the volume through the control the record sound lagged and was unusable.
 After killing pulse and reloading ALSA everything worked well.
 Unfortunately OpenSuse produced no sound whatsoever so i couldn't test it.
 Shall I download the Mandriva Live CD and test that?
 So why is this an ubuntu specific bug (redhat-bugs #474477), indeed you
 have commented on this bug. So I find it weird why I was chastised
 earlier.
 What I do not understand is why does pulseaudio not recognize the ALSA
 digital mic control settings and simply relay these. Just now these have a
 far superior quality than boosting the microphone via pulse and avoid
 delay issues with some software. It used to do this in Hardy's pulseaudio,
 what has changed?
 If you can help or have any further constructive advice about where I can
 file a bug then please advise.

-- Ticket URL:  PulseAudio
 The PulseAudio Sound Server

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

Do you also have lag/quality problems on gnome-sound-recorder and
audacity?  I think perhaps Skype has other problems with pulse beyond
the low volume (although it seems to be working ok for me on my Dell
1420 now that I increased the input volume beyond 100% in paman).
Audacity is probably the best test.  On the skype linux blog today, the
developer said in the comments that a new hotfix version with pulseaudio
would be coming soon (whatever soon means).

By the way, are you sure the default source device in pulse is set to
alsa capture and not the "alsa monitor" device.  I don't know what they
mean by Monitor, but it is not the mic above the screen.  ;)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

I also thought, I would point out that when you increase the volume past
100% in paman, you don't need to go very far because it is nonlinear.  I
find increasing it to 130% is sufficient.  If it is much higher I just
get crap out of the mic...

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

@mabawsa: Ubuntu didn't incorporate the latest g-v-c because it was
buggy (from memory, it was missing controls and not integrated with
gnome-sound-properties properly). At the time I saw it it also didn't
adjust the volume past 100%. The pulseaudio stuff is buggy too: the
pulseaudio volume control only goes to 100% unless you've used paman to
set it at more than 100%. So I agree that the pulse developer's excuses
are poor.

@jdeslip: I get the same thing with both output and input, anything past
110-130% is distorted. It makes a mockery of the 480% max!

If the mic works with pulseaudio removed, maybe pulseaudio just isn't
mature enough yet. Maybe Ubuntu should offer an _easy_ way of disabling
it, eg in an audio configuration manager.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

I did install g-v-c last night and it was rather buggy, but nice. However until 
the recording quality on the pulse mixer matches that of ALSA dmix (I have 
noticed lots of distortion and jumps even though I only set it to 120%) then 
ALSA is the only way to go. These quality issues are ubuntu wide but the lag I 
have seen shows up on certain websites where you use Flash to conference and 
for sure Skype. I have not had pulse installed for very long on any PC to do a 
more in-depth study. There is something about intel ICH7/8/9 chipsets that 
doesn't like pulse I think. An easy way to get ubuntu pulse free would also be 
nice, indeed I am quickly coming to the conclusion that Xubuntu may be the way 
to go.
I wonder if Dell would want to officially comment on this as many of their 
machines are shafted by this bug.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

@mabawsa:
> An easy way to get ubuntu pulse free would also be nice
Maybe this?
1) sudo apt-get install bum
2) sudo bum
3) uncheck pulseaudio in the bum dialog and apply.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Luca Invernizzi]

Just for the records (and google search), following  marcus grenado

* https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/109 
* https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/110

 I was able to solve my issue with low microphone volume in pulseaudio on a 
Dell xps m1330  (exactly, m1330n) with an audio device  Intel Corporation 
82801H (ICH8 Family) HD Audio Controller on ubuntu jaunty 9.04. 
A small change had to be done: change  the line in ~/.asoundrc (or 
/etc/asound.conf) "max_dB 50.0" to max_dB 30.0 , otherwise the gain would be 
way too high.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Jesper de Jong]

I have just installed Jaunty (amd64) on my Dell XPS M1530 and the
problem still exists. I've found a way to make it work acceptably,
however.

First, install pavucontrol. Then, go to the PulseAudio manager (command:
paman). Go to Devices, Sources, click the alsa_input... device and click
Properties. In the dialog that opens, set the volume to approx. 135%.
Test with Sound Recorder if the level is OK. (I've found that the slider
is quite sensitive, setting it higher, for example to 150% produces a
too loud sound and lots of white noise).

In Skype (I installed Skype from Medibuntu): Set Sound In, Sound Out and
Ringing to "pulse". (It looks like in this version of Skype and Ubuntu,
it works if you use pulse for Sound In). Make sure that "Allow Skype to
automatically adjust levels" is UNchecked.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

@Jesper
Yeah this is similar to 131 and 132 however using this I experience poor 
quality recording sound in ubuntu and during a Skype conversation an ever 
increasing lag, which are not there on ALSA only.
Do you get similar effects Jesper?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Jesper de Jong]

@mabawsa
I just had a Skype conversation, and the person on the other side (on a Windows 
XP computer) did notice a lag of between 1 and 2 seconds between the video and 
sound he received from me. His video and sound (that I was receiving) was not 
lagging.

Note that the volume setting is very sensitive; if I put it on 150%,
then I'd get noise and poor quality, but at 135% it seems to be just
right.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Frederic Van Espen]

@Jesper
Your trick also worked on my M1530, but there is indeed alot of noise. I am 
experiencing the lag the other way around though. From ekiga to cellphone is 
almost instant but from cellphone to ekiga has a 1 - 2 seconds delay. But this 
could be the voip provider's fault, or ekiga...

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

I can now get gnome-sound-recorder/audacity to work by going to pulse-
audio-manager (paman), going to devices and selecting the properties of
the alsa input device and increasing volume above 100%.  It seems like
the new gnome-volume-manager would give you this ability but ubuntu
choose not to include for jaunty.  That is too bad.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[torstenaf]

Same here. Very low volume with pulseaudio and ICH6, older Sony VAIO laptop 
VGN-S505.
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
High Definition Audio Controller (rev 03)

I have a simple but not elegant solution.

1) Open volume control.
2) Preferences
3) Enable "Microphone", "Capture" and the first "Input Source"
4) Close Preferences
5) Click "Options" tab
6) Change the input source to "Front Mic"
7) Try to record something.
8) Change the input source to "Mic"
9) Recording now works.

Somehow changing the input source away from "Mic" to "Front Mic" and
back to "Mic" does something to the sound system. The result is that I
am now able to record sound appropriately, and Skype works correctly.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[torstenaf]

Same here, ICH6 and 8.10 on older Sony VAIO.

If I add the "Input Source" from the volume manager preferences, then
click "Options" and change "Mic" to "Front Mic" and try to record
something, it doesn't work. If I then change "Front Mic" back to "Mic" I
have normal audio recording. Skype (set to use pulseaudio) also works
now.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Jgull8502]

I tried the solution that torstenaf suggested and it didn't work.

Then I went ahead and tried Marcus' hack recommended by earlier posters
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/275998/comments/109).
This worked for me and fixed skype, but I couldn't get sound recorder to
work, although this is less important for me.

It would be nice if an actual solution was worked into alsa though. :)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Thomas]

The bug is still present on jaunty with updates of 2009-03-30 on XPS
M1530 (amd64).

sudo chmod -x /usr/bin/pulseaudio

"fixes" it for the moment by making pulseaudio unexecutable.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[jdeslip]

On jaunty, Marcus solution worked for me on skype.  Didn't seem to raise
volume on gnome-sound-recorder though...  Can this not be added to alsa
somehow??

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

The 2.6.30-rc6 kernel includes alsa 1.0.20 and it detects the digital
mic volume control, so if you install this kernel from the weekly builds
it should fix the low mic volume problem.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Parazythum]

Hi, I'm using Jaunty, and have a Dell XPS M1330.

lspci gives me : Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 02)

The PulseAudio Manager tip worked for me, BUT : don't let the slider go
up to 480%, the input level is too high ! It works perfectly for me at
130-140% (more gives me a lot of statics).

Hope this helped.

*** paste of the message above (thanks Motin)  :

   1. Open Application -> Sound & Video -> PulseAudio Device Chooser
   2. Click on the "PulseAudio Applet" on the system tray and open "Manager".
   3. Click on the "Devices" tab, select 
"alsa_output.pci_8086_284b_sound_card_0_alsa_playback_0.monitor" which is the 
"Monitor Source of ALSA..."
   4. Click properties and set the volume to maximum (480% on my computer)
   5. Record a song using the gnome-sound-recorder for testing

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mechiscogo]

Hello guys, may be you want to look at this post.
https://bugs.launchpad.net/ubuntu/+bug/391926. Try applying the patch
mentioned there (just in case). I don't know if installing them helped,
but I guess it worked for me :P . Make sure to follow this:
https://bugs.launchpad.net/ubuntu/+bug/391926/comments/2 . Probably it
works for you as well. Do it carefully, since I don't know sh..t about
anything. All I know is that it worked very well. :)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[kernel-janitor]

** Tags added: review-request

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

I suppose nobody involved in any of these projects have any care for
this bug. This is just bullshit. Trying to talk to the different
projects leads to nothing, as nobody wants to say it is their problem.
Whatever. This just adds to the problem people have when trying to
switch to linux. I know all these developers would rather not to deal
with bugs that are troubling and continue adding features but this is
the stuff that needs to be done for the general public to join in on
linux, let alone Ubuntu. We had to figure out our own workarounds that
are literally workarounds that do not provide anything of quality. I am
mainly looking at PulseAudio as this problem is not present when working
without it. Even if it may not be their problem, they still should be
involved in this bug and take the steps to move this bug upstream to
wherever it needs to be fixed. /rant

I am done with this bug. Please somebody tell me that I am wrong in my
rant.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Susan Cragin]

Pulseaudio has other problems, other than this one. It stutters with many 
applications and sound cards. With some the sound quality is poor. With others, 
the applications get timeout errors and freeze or crash. 
Check the bug reports. 
It also is incompatible with the sound applications I use: wine and audacity. 
And it runs on top of alsa, rather than in place of it, adding latency. 
If you are comfortable without pulseaudio, right now it is impossible to remove 
it (I've tried) without causing major problems and having gnome programs chew 
up 50% of your CPU. 

However, open a terminal
enter killall pulseaudio
and you are safe for a session. 

Pulseaudio may someday become useful. Right now, asking it to work
perfectly is a waste of typing time.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mike hancock]

I think it is kind of sad/embarrassing  to have this bug still open,
since it effects the dell xps1330 with ubuntu pre-installed(well only
after you upgrade).  there are only a few computers that dell has
with Ubuntu preinstalled and this is one of them.  I bought this
computer so I would NOT have to deal with these kinds of problems(or at
least see them get fixed very quickly).  but this has remained for quite
some time.  I don't mean to sound rude, but I think bugs that effect
hardware for any of the computers that have Ubuntu pre-installed on them
should get special treatment. Period.  I really feel... well let down
with the Ubuntu community.  You might ask, well what am I doing to fix
this issue... well nothing.  But I am a computer science major and I
want to contribute code(in the future) to kde and kubuntu project(and I
have been working to learn that).  So I am no lazy slacker with FOSS
that just wants my bug fixed.  There really should be a group of people
that make sure that any computer that is pre-installed with Ubuntu works
correctly.  If I can't trust a computer that came with Ubuntu pre-
installed to work correctly with Ubuntu, what is the point of there
being computers with Ubuntu pre-installed?  How can this be marked wish-
list.  Yes I wish the hardware of the computer I bought with Ubuntu pre-
installed would 'just work'.  If it did, then I could recommend Ubuntu
to other people and tell them to buy a dell it has Ubuntu pre-installed.
But I can't recommend that if I know there might be problems like this!

The problem is not 'just this bug'  but really the fact the on-one stood
up and said "we need to make _DAMN_ sure that any computer that comes
with Ubuntu pre-installed 'just works' ."  This bug just shows that what
I am saying IS a real problem.  and I think it is a very serious one.
This problem is pushing Ubuntu back to the idea of "it's just an OS for
hobbyists or computer science nerds, not regular people."

before any one mentions "dell ubuntu project"  well it turns out they
only make sure that the system works with _exactly_ what was pre-
installed, but they do care about after the system is upgraded

ok, so I might not have all the facts, but I think I have enough to
justify this rant.  One thing is clear, people that bought dell
computers with ubuntu pre-installed

We need some answers, as to what the heck is going on here!!??

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

@talent03: seriously, just install the 2.6.30 kernel. It fixes the
microphone problems and has the welcome side effect of not hanging the
kernel while deleting files from an ext4 partition. It should really be
the default kernel for Jaunty.

1. Go to http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30.4/

2. Download the appropriate kernels, eg if you're using 32 bit, you
need:

linux-headers-2.6.30-02063004_2.6.30-02063004_all.deb
linux-headers-2.6.30-02063004-generic_2.6.30-02063004_i386.deb
linux-image-2.6.30-02063004-generic_2.6.30-02063004_i386.deb

(choose the amd64 deb files for 64 bit)

3. Install these files using 'sudo dpkg -i ' from a gnome-
terminal.

4. Reboot into the new kernel.

The only drawback is that if you're using the restricted nvidia drivers,
they won't compile for the new kernel so you'll get lowres mode in X. In
this case, you could use the envy-ng driver to build the driver for the
new kernel, or you could download the 185.18.31 driver directly from
nvidia (ftp://download.nvidia.com/XFree86/Linux-x86/ for 32 bit,
ftp://download.nvidia.com/XFree86/Linux-x86_64/ for 64 bit) and install
it manually. I've also found that the 190.18 beta driver works fine.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[bigbrovar]

@Mike Hancock

I can confirm that its almost impossible to get the internal mic working
on the dell m1330 xps with the vanilla install of ubuntu 9.04. However
if you use the custom dell image of jaunty which can be downloaded here
http://linux.dell.com/wiki/index.php/Ubuntu_9.04 its what i use and the
internal mic works out of the box even with skype i didn't have to do
any further configuration. perhaps you should try it. Its really the Job
of an OEM to see that the OS there ship works with their Hardware and in
the light Dell has provided a custom Ubuntu image for their hardware.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

Thanks for the comment Rocko.

As far as I have checked on this bug I have not heard that the 2.6.30
kernel fixed this problem. Was this fixed with the drivers, alsa, or
something else in the kernel? Well either way... before I go on to
upgrade the kernel on Jaunty, I want to know whether anybody else has
confirmed that this has been fixed. If you are right then this is great.
As far as I know alsa is built into the kernel now, so I would have to
upgrade the kernel to fix it if it is alsa. If that is the case then
this bug can be closed when karmic comes out; crosses fingers. Is there
anybody with an idea on what fixed it though? Can we backport those
fixes into this kernel. All questions for people more experienced than
me. Thanks for the info Rocko, I just want confirmation before
continuing.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

@Mike Hancock

Do you know what packages of dell fixes the problem? Does the custom iso
have certain kernel packages somewhere, like their repository. The last
time I used their jaunty repository they did not have any fixes for
this. Please be more informative if possible.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

My last comment is actually directed @bigbrovar

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[bigbrovar]

@talent03
Nope afaik there is was no custom package or patch from dell on their custom 
image. the dell ppa repo for jaunty had no package the time i checked. 
according  to the dell ubuntu wiki page 

* Additional audio mixer volumes will be set to default at 100% (such as Front 
or PCM).  
  Main will still be at 80%. Lots of Dell laptops audio is improved by this, 
and now the 
  full range of audio is controllable by the hotkeys.

http://linux.dell.com/wiki/index.php/Ubuntu_9.04#Dell_OS_Factory_Recovery_9.04_DVD_ISO

hence i feel what they did was set adjust the settings of alsamixer to 
something that works best on dell laptops
The problem of pulse as always been settings

I now use kubuntu 9.04 with kde 4.3 and i can confirm that i use my
internal mic with little hassle i can even make skype calls

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

I think I may also have found a different approach from a Kernel Update,
which I could never get working as well as Rocko. Indeed I buggered up
my system and had to re-install (probably cause i am a technical
Neanderthal):

I added the http://philip.magicalforest.se repository, updated the repos, 
installed the default ubuntu-desktop package (to get a minimal pulseaudio) and 
updated the system.
Everything now works. Skype for some reason (probably a blacklist somewhere) 
avoids using pulse all together so you need to set this to default.
 I only did this last night so I am unsure how stable things are but I can 
always go back to a pulse only installation.

I am however still unsure on what use pulseaudio is. I read through
their wiki and I am still none the wiser It seems like its just a
wrapper for the various sound standards, but I am more than likely
wrong. Maybe canonical could make it an recommend rather than a
requirement for ubuntu.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

@talent03: yes, it's the updated alsa drivers which fix the bug (see
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/184).
The version of alsa that ships with 2.6.30.4 had a lot of work done in
it for the ICH8 chipset. Instead of installing the new kernel, you could
alternatively install just the latest alsa drivers to fix it (see
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/89).
But it's much easier to install the new kernel.

The bug is also fixed in Karmic because it's using the 2.6.31 kernel.
You could also install Karmic's kernel (and restricted nvidia drivers)
by (1) adding the karmic repository in Synaptic, (2) refreshing, and (3)
searching for and upgrading linux-image (nothing else, though!). After
you do this, I recommend disabling the Karmic repository so you don't
inadvertently upgrade to the rest of Karmic, which is still only in
alpha.

I'd recommend just using the 2.6.30.4 kernel though since it's stable.
I've been using 2.6.30 since May now without issues.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

@Rocko; If this is truly the case, then jaunty can never be fixed unless
the driver is somehow provided in a backported way. It should be noted
on the status I figure, including Karmic. Would there be anyway to get
this into backports? I am not as involved as I would like to be with
this project, so someone with more experience can possibly get this fix
into backports if possible. I would like to see people have this problem
resolved better than just upgrading to the next version. If the driver
is the issue I hope we can have somebody compile the kernels with the
new alsa, possibly, or one of us can have a ppa set up with the fix. I
hope we can have a stable and fairly easy fix for people who are much
less knowledgeable.

After looking at the bug https://bugs.launchpad.net/dell/+bug/309508 and
https://bugzilla.redhat.com/show_bug.cgi?id=498612#c4 - I am wondering
if the mic works for Intrepid using proposed? If that is the case, it
would be great if that could get pushed into jaunty. The redhat link
seems to me to be a hint towards bigbrovar's pointing out of the quote
in the dell wiki. Although, I think I will have to take a better look at
all of this new information after I get some sleep. Thank you Rocko and
bigbrovar for being very informative. My only hope is that we can find a
simple way to solve this issue and have it at the top with the initial
report. Some of the info from Rocko would be nice to see at the top for
now.

** Bug watch added: Red Hat Bugzilla #498612
   https://bugzilla.redhat.com/show_bug.cgi?id=498612

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

So I am here to report my progress with this. I followed what Rocko
recommended and upgraded the kernel to 2.6.30.4. To do this I had to
upgrade nvidia binary driver to 180.60 as well because the current one
will not work with the jaunty kernel. Sound is definitely better because
I don't get crackling anymore and latency issues so far. I almost want
to apologize to the PulseAudio developer but when I upgraded the sound
was still low on the mic, but when boosting it through paman I
definitely had a better quality input. Since things work much better for
me, I will just post the steps to getting there for me. There is no
support for this, so be aware of that. Make sure to get rid of any
workarounds to get this working. I hope this helps.

First install the nvidia driver if needed... I have m1330, so I needed it.
Install in order from this mirror since the archive for ubuntu no longer has 
it: 
http://ubuntu-mirror.cs.colorado.edu/ubuntu/pool/restricted/n/nvidia-graphics-drivers-180/
nvidia-180-kernel-source_180.60-0ubuntu1_i386.deb
nvidia-180-libvdpau_180.60-0ubuntu1_i386.deb 
nvidia-glx-180_180.60-0ubuntu1_i386.deb

Install the kernel in order from here that I give for packages: 
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30.4/
linux-headers-2.6.30-02063004_2.6.30-02063004_all.deb
linux-headers-2.6.30-02063004-generic_2.6.30-02063004_i386.deb (or amd64)
linux-image-2.6.30-02063004-generic_2.6.30-02063004_i386.deb (or amd64)

Once all this is installed you can restart and everything should be
functioning. You can adjust the mic sound through paman in the devices
tab and click on properties for the input source. Set skype to pulse.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

@talent03: brilliant! Now open gnome-volume-manager's Preferences (ie
double click on the volume icon in the gnome panel) and see if there is
now a setting for 'Digital Recording'. If so and you enable it via the
check box, a level control will appear in the Recording tab and you
should be able to directly control the microphone volume instead of
using paman.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

@Rocko: I looked for something like that as soon as I restarted, but I
did not have a setting such as 'Digital Recording'. That is why I had to
do it through paman. I am fine with this though, since I only set it
once. Thank you for the help.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

It might be something to do with your /etc/asound.state file, which I
think is created by alsa. I think I had to reboot a couple of times and
possibly even run a configuration command before the new alsa recognised
the digital mike control. Now there is an entry at the end of
asound.state that says:

control.29 {
comment.access 'read write user'
comment.type INTEGER
comment.count 2
comment.range '0 - 120'
comment.tlv '00010008f4480032'
comment.dbmin -3000
comment.dbmax 3000
iface MIXER
name 'Digital Capture Volume'
value.0 96
value.1 96
}

ie this is control 29 out of 29 controls.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

@Rocko: Do you remember the configuration command? Maybe you installed a
newer version of alsa that may have done this for you. I am not sure of
a way to reconfigure alsa on Ubuntu. There is no alsaconf and ubuntu
does not recommend using it.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

I think the configuration command might have been 'alsactl store', which
creates a new asound.state file. I think you have to delete or move the
old asound.state file first. As well, there is an /etc/asound.state file
and also a /var/lib/asound.state file - I don't recall if you have to
move both, but I've only got a backup in /etc so this might be the key
one. The one in /var/lib/alsa might just be the one that alsa uses when
restoring values after reboot.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

@talent03: I tried installing a fresh Jaunty and upgrading the kernel to
2.6.30.4, and it didn't detect the digital capture volume, just like you
found. Issuing alsactl stored didn't help either. Also, it seems that I
must have made a link from /var/lib/alsa/asound.state to
/etc/asound.state, because the default install puts the file only in
/var/lib/alsa/asound.state.

However, I did finally get my new Jaunty install with the upgraded
2.6.30.4 kernel to recognise the digital capture volume via the
following:

1. I copied the asound.state file across from my previous installation
to /var/lib/alsa/asound.state. (It includes the Digital Capture Volume
control, which either alsa detected at some point by itself or which I
must have copied from a Hardy installation a year ago.)

2. I did "sudo alsactl restore" and then "sudo alsactl store" while in
the /var/lib/alsa folder. (The first one is probably the important one -
it loads the configuration from asound.state. The second command might
not be necessary, as it should just save the volume settings back to
asound.state).

3. When I opened up the gnome-volume-control, "Digital" then appeared as
an option under the Capture, Capture1, and Capture2 controls. This is
the Digital Capture Volume that alters the hardware microphone level.

I've attached my asound.state file in case it helps. It's for an Dell
XPS M1530 with the ICH8 high definition audio chipset.

** Attachment added: "asound.state"
   http://launchpadlibrarian.net/30386944/asound.state

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Thomas]

The workaround does not work for skype as it produces a huge echo effect
at the side of my dialog partners. This is not the case with pulseaudio
disabled. So currently there is no way of having pulsaudio enabled on my
xps 1530.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

@Thomas - I had the exact same problem, but I worked around it by
adjusting the level of the mic boost and the level of the capture to get
it just right. I tested it with skype and sound recorder. Once I did not
have the problem, I just set skype in the preferences so it would not
adjust my volume. That is why I said further up that this is obviously a
major workaround... at least it is a workaround that seems to work.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Binoy]

The fix mentioned here, worked for me

http://www.naysaying.com/blog/2008/10/fixing-low-microphone-volume-problem.html
I have a dell XPS 1530. Ubuntu Intrepid ibex

   1. Open Application -> Sound & Video -> PulseAudio Device Chooser
   2. Click on the "PulseAudio Applet" on the system tray and open "Manager".
   3. Click on the "Devices" tab, select 
"alsa_output.pci_8086_284b_sound_card_0_alsa_playback_0.monitor" which is the 
"Monitor Source of ALSA..."
   4. Click properties and set the volume to maximum (480% on my computer)
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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

Tried the fix. It did improve microphone pickup by 4.8 times on my M1330. 
However the pickup was still much worse than by purging pulseaudio and using 
only ALSA.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[arnarag]

I'm running a Dell xps m1330 and managed to fix this. The problem for me
was pulseaudio. What I did was that I removed pulseaudio and installed
esound instead.

I used this guide here: http://ubuntuforums.org/showthread.php?t=973637

After this I set everything in System -> Preferences -> Sound
Preferences to "ALSA - Advanced Linux Sound Architecture" and in Default
Mixer Tracks I set it to HDA Intel and chose Master - Capture - Digital
and Mux. I have no idea if this is relevant, but it works for me with
these settings. Then I went to sound settings in the top right corner
and just turned everything up, unmuted everything and in HDA Intel ->
Options I set Digital Input Source to Digital 1 and the rest to Front
Mic.

I've tried this with sound recorder and Skype. In Skype options -> sound
devices I set everything to Default Device but unchecked the Allow Skype
to... thing.

Hope this works for more users,
Arnar

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Daniel T Chen]

Luke, we could ship an additional stanza in alsa-lib.

** Also affects: alsa-lib (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: alsa-lib (Ubuntu)
   Importance: Undecided => Wishlist
   Status: New => Triaged

** Changed in: alsa-lib (Ubuntu)
 Assignee: (unassigned) => Daniel T Chen (crimsun)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Javier Jardón]

** Description changed:

  Hi,
  
  I have a dell xps m1530 laptop with the following internal audio device:
  
  00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
  Controller (rev 02)
  
  In hardy, sound recording from the internal mic works great, but in Ibex
  sound recording with the internal mic is very silent. I can't make it
  louder with the gnome volume control and alsamixer.
+ 
+ See
+ https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/275998/comments/109
+ for a temporary solution

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

I've just moved to Intrepid (alsa 1.0.17) on a Dell Inspiron 1720 with
Intel audio (00:1b.0 Audio device: Intel Corporation 82801H (ICH8
Family) HD Audio Controller (rev 02)), and I was having exactly this
same problem: my internal digital microphone on the top of the screen
would only capture my voice if I shouted.

I was able to quickly fix it by modifying my /etc/asound.conf. The idea
was to use ALSA's softvol dB-gain plugin to do a software mic boost and
pipe that to a new pulseaudio device "pulseboost" that can be used by
Skype etc.

After adding those lines below and rebooting, you should see a new
slider called "+50dB Mic Capture Volume" in gnome-volume-control's
Recording tab (if you don't see it, go to Preferences and check it).
Raise it to maximum (+50dB), or a bit below that in case the maximum
value clips your voice or captures too much noise in the environment.

In my case, Skype was able to list a new device named "pulseboost" in
its Options configuration dialog's SoundDevices tab. If you choose this
device for SoundIn, Skype can benefit from the +50dB softvol mic boost
in gnome-volume-control. I also chose it for my Skype's
soundout/ringing, but I think that's not required.

Is there a side-effect to this? Well, I guess that with this setup you
can only use the mic at one application at any time, because it directly
accesses the mic's hw:0,0, but at least you have a huge mic boost in
that application.

### my /etc/asound.conf:
pcm.pulseboost {
type asym
playback.pcm {
type pulse
}
#software gain upto 50dB for digital microphone
capture.pcm {
type softvol
slave.pcm "hw:0,0"
#slave.pcm "pulse0"
control {
name "+50dB Mic Capture Volume"
card 0
}
max_dB 50.0
}
}
ctl.pulseboost {
  type pulse
}

I also added the line 'load-module module-alsa-source device=pulseboost'
to my /etc/pulse/default.pa, and renamed my ~/.asoundrc to avoid any
conflicts with my previous alsa configuration, but I think that's
unnecessary.

That would probably work with Hardy, Gutsy, Jaunty etc as well. Please
let me know if that works for anyone here.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Bengt Olsson]

Marcus,

Sounds like a good work-around, however I have no /etc/asound.conf
file... :( Is that something special for the Intel sound device? Have

sudo lspci | grep audio
02:0a.0 Multimedia audio controller: Creative Labs SB Audigy (rev 03)

Same problem with very low recording volume (and no "Digital" control
options in the alsamixer)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

Hi, Bengt,
I didn't have the file /etc/asound.conf as well, I just created a new one with 
the contents above. (If you had this file with something in it, you should just 
append the contents above to the bottom of it.) This file is not specific to 
the Intel sound device, it is generic for ALSA, so this workaround should work 
with any card supported in ALSA. Try the solution above, I guess it is quite 
likely it works for your SB Audigy. Let us know if that's the case...

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

@Bengt: BTW, you should verify if your SB Audigy mic device is located
at "hw:0,0". This is in the format "hw:,". If not, you
should modify the corresponding line in the /etc/asound.conf file above.
In order to find this out, I think you can use the output of "arecord
-l" or "aplay -l". Other possible values are "hw:0,1", "hw:0,2", ...
"hw:1,0" etc.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[vinlos]

Wonderful Marcus,

it works, but now I hope Pulse audio team could find an own solution to
make it work just out-of-the-box

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[vinlos]

I have a dell xps m1330 with HDA Intel sound card

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[tomek.bury]

Hello,

It doesn't work for me I'm affraid. I've got Dell XPS M1330.

lspci reports:

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio 
Controller (rev 02)
Subsystem: Dell Device 0209
Flags: bus master, fast devsel, latency 0, IRQ 21
Memory at febfc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: 
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel

$ arecord -l
 List of CAPTURE Hardware Devices 
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 3/3
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2

The /etc/asound.conf didn't work at all. I had to rename it to
~/.asoundrc to make the new control to appear. But it has no influence
on mic sensitivity at all. I've tried hw:0,0 0,1 0,2 and 1,0 (restaring
alsa after each change) - none of them worked. In fact none of the
recording sliders have any influence on the recording volume.

I'll try to get rid of all audio packages but the standard ones and I'll
try again.

Cheers,
Tomek

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[timblack1]

@Marcus:

Thank you for your help!!  I created an /etc/asound.conf file following
your directions and changed the appropriate line to read:

slave.pcm "hw:Intel,0"

I did that because Skype lists "hw:Intel,0" as one of its available
sound devices.  In other words, the changed line now references the
device name (Intel) rather than the device ID (0).

The result is that Skype works.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[timblack1]

@tomek:

I should mention that the new slider now DOES affect the recording
volume on my machine.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Chris Ian Fiel]

 tomek.bury  thanks a lot! it works in my xps m1330. It works in skype. but not 
in sound recorder.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

I had an interesting chat with pulseaudio's Lennart some time ago, it
might interest some of you here. IMHO that Lennart seems to acknowledge
this problem in pulseaudio, but also says that this could be fixed by a
modification in the alsa modules (by removing all hardware volume
control in alsa so that pulseaudio would take over the channel and
automatically expose software amplification by scaling), and he also
seems to be trying to find people asking for a fix so as to justify the
work into adding softvol dB-gain to pulseaudio on top of the already
existing hardware-vol dB-gain that alsa usually provides.

I guess that people here and from other distros could show him that
there's demand for such a fix, by commenting as much as possible on
pulseaudio's corresponding bug at http://pulseaudio.org/ticket/423 and
letting him know of how many people are being affected, and maybe asking
pulseaudio to expose the already existing software amplification scaling
to the UI, together with some dynamic range compression to avoid signal
clipping.

Cheers,
Marcus

-
>Dear Lennart,
>
>I've been looking at the source code of module-alsa-source (at 
>http://www.pulseaudio.org/browser/branches/glitch-free/src/modules/module-alsa-source.c?rev=2308
> ) 
>trying to understand how I could produce a +20dB software gain or so to my 
>alsa microphone.
>
>Looking around lines 649 (source_get_volume_cb) and 686 (source_set_volume_cb, 
http://www.pulseaudio.org/browser/branches/glitch-free/src/modules/module-alsa-source.c?rev=2308#L686
 ),
>it seems that there is some kind of volume normalization being produced via 
>PA_VOLUME_NORM. Do 
>you think if I modified PA_VOLUME_NORM, changing it to a larger value, then 
>source_set_volume_cb 
>would accept larger volumes for the alsa microphone?  Or is this a global 
>parameter that would 
>produce out of range samples all around?
>
>Or is there something simpler to do (like using some volume amplifier plugin 
>between the alsa mic 
>source and pulse mixer), or some pulse configuration that I could use instead 
>(maybe something 
>related to ladspa, but I cannot find a pulseaudio ladspa source plugin, only a 
>module-ladspa-sink).
>
>Thanks in advance,
>M.
-

>> Dear Lennart,
>
>
>I don*t think that simply scaling all PCM data with 20dB is such a
>good idea, due to clipping and stuff. If you want this, then we should
>add some dynamic range compression code first.
>
>> I've been looking at the source code of module-alsa-source (at
>> http://www.pulseaudio.org/browser/branches/glitch-free/src/modules/module-alsa-source.c?rev=2308
>>  )
>> trying to understand how I could produce a +20dB software gain or so to my
>> alsa microphone.
>>
>> Looking around lines 649 (*source_get_volume_cb*) and 686 (*
>> source_set_volume_cb*,
>> http://www.pulseaudio.org/browser/branches/glitch-free/src/modules/module-alsa-source.c?rev=2308#L686
>>  ),
>> it seems that there is some kind of volume normalization being produced via
>> PA_VOLUME_NORM. Do you think if I modified PA_VOLUME_NORM, changing it to a
>> larger value, then source_set_volume_cb would accept larger volumes for the
>> alsa microphone?  Or is this a global parameter that would produce out of
>> range samples all around?
>
>For ALSA we limit ourselves to what the hardware provides. We don't do
>software volume adjustments if the hardware provides us with a certain
>minimal set of featzres.
>
>If software volume control is done, PA will alow you to do
>amplification by scaling. However, this is not exposed in the UI due
>to the reasons mentioned above. If you really want this, then the
>easiest way to make use of this is probably to hack the ALSA modules
>to never make use of hw volume control and always do it in
>software. Of course, that would be a hack, but should be OK.
>
>Eventually I hope to "extend" the hw provided volume scale in
>software. We need this because for some hw the lowest volume setting
>is not silence -- however users expect it to be. If we add this we
>will also be able to provide software amplification on all devices
>easily while still relying on the basic hw volume control stuff.
>
>Lennart
>
>--
>Lennart PoetteringRed Hat, Inc.
>lennart [at] poettering [dot] net ICQ# 11060553
>http://0pointer.net/lennart/   GnuPG 0x1A015CC4

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[timblack1]

Marcus wrote,

> IMHO that Lennart seems to acknowledge this problem in pulseaudio, but
also says that this could be fixed by a modification in the alsa modules
(by removing all hardware volume control in alsa so that pulseaudio
would take over the channel and automatically expose software
amplification by scaling)

It seems to me then that an appropriate way for Alsa to allow Ubuntu to
continue migrating to Pulseaudio would be to add a checkbox to Alsa's
settings which says "Allow Pulseaudio to manage all volume control," and
make the effect of that checkbox be that it disables Alsa's hardware
volume control code.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

Or have a switch that disables pulse all together in ubuntu rather than
having to remove the ubuntu-desktop. I haven't had any issues with only
running Alsa it just works. What is the purpose of pulse audio, I was
never too sure?

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[skull77]

@ Marcus:

thank you very much!

It works for me (xps m1530). I tested it in skype.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[timblack1]

@mabawsa

>From what I can see from the diagram below and its related explanations,
one reason is that not every application (Skype may be a good example)
uses Alsa.  Instead, applications use a variety of sound systems.
PulseAudio integrates all those systems into one.

http://upload.wikimedia.org/wikipedia/commons/1/14/Pulseaudio-
diagram.png

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

I think software volume boost (both capture and playback) is a fantastic
idea - wouldn't it be great if alsa incorporated it into the hardware
controls as standard once you adjust past 100%? (On my XPS M1530 the
playback volume is very low - I need to have everything set to near 100%
to make it audible.)

Having it in pulseaudio is a great idea as well (if only pulseaudio
worked consistently).

@mabawsa - thanks for the tip. It works for me in skype, although not in
sound-recorder (presumably because the new control doesn't appear in
gnome-sound-properties, so you can't assign it as the default gnome
sound capture device).

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

@Chris,Rocko,mabawsa:

In order to make the micboost available to all pulseaudio clients in
Ubuntu, like gnome soundrecorder, you can also use the alsa softvol
trick that I suggested above in reverse, creating a new alsaboost device
on top of which you will run pulseaudio, by modifying the following
files (1) and (2) below (make a backup of those files first, just in
case something breaks in your Ubuntu).

After restarting alsa/pulseaudio (or rebooting), you should verify that
the program "paman" shows alsaboost_sink and alsaboost_source as the
default pulseaudio sink and source. From now on, all ubuntu programs
that understand pulseaudio should be able to automatically benefit from
the micboost when recording. You can test this by changing the new +50dB
Mic slider in gnome volumecontrol while recording in gnome
soundrecorder. Let us know if other recording programs work fine as
well.

caveat 1: skype doesn't like to use pulseaudio, so you should still
choose the "alsaboost" device for its SoundIn configuration, but you can
use "pulse" for its SoundOut and Ringing. This seems to be a deficiency
in skype, and the side-effect is that while skype is in a call, you
won't be able to use the mic in a different application like gnome's
soundrecorder. Also, if another program is using the mic, skype won't be
able to use it.

caveat 2: under this configuration, skype also likes to mess with the
value of the +50dB Mic slider if the option "Allow skype to
automatically ajudst my mixer levels" is checked in. I would recommend
disabling this option, or at least keeping in mind that if the mic stops
recording, it's very likely that skype messed with the micboost slider.

This hack worked for me, let me know if that works for you (and anyone else).
Cheers,
Marcus



1) create/update your /etc/asound.conf:

# creates a new alsaboost device that takes over sound card
pcm.alsaboost {
type asym
playback.pcm {
type hw
card 0
}
#software gain upto 50dB for digital microphone
capture.pcm {
type softvol
slave.pcm "hw:0,0"
control {
name "+50dB Mic Capture Volume"
card 0
}
max_dB 50.0
}
}
ctl.alsaboost {
  type hw
  card 0
}


2) modify your /etc/pulse/default.pa, in order to add the two uncommented lines 
below at a 
similar place in your default.pa (around line 35 in my case), and keeping all 
the 
remaining lines in your default.pa (this location is important, do not put them 
at the bottom 
of default.pa or otherwise alsaboost will not load properly in pulseaudio 
because it
will prefer to load, instead, the original sound device via module-hal-detect a 
few lines down):

### Load audio drivers statically (it's probably better to not load
### these drivers manually, but instead use module-hal-detect --
### see below -- for doing this automatically)
#load-module module-alsa-sink
#load-module module-alsa-source device=hw:1,0

load-module module-alsa-source device=alsaboost source_name=alsaboost_source
load-module module-alsa-sink device=alsaboost sink_name=alsaboost_sink

#load-module module-oss device="/dev/dsp" sink_name=output source_name=input
#load-module module-oss-mmap device="/dev/dsp" sink_name=output source_name=inp$
#load-module module-null-sink 
#load-module module-pipe-sink


2b) in case you have several devices, or for some other reason alsaboost 
doesn't become the default source/sink in pulseaudio, you can force that by 
adding the following two lines at the bottom of default.pa:

set-default-sink alsaboost_sink
set-default-source alsaboost_source

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Marcus Granado]

It's necessary to do another thing, otherwise the device alsaboost_sink
will conflict with the original sound card device provided to pulseaudio
by hal, and therefore some apps will not be able to share the sound
card:

3) comment out the line 'load-module module-hal-detect' in your
/etc/pulse/default.pa (just add a # in front of it).

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Nico_argentina]

Following Marcus steps 1),  2),  2b) and 3) solved the problem in my Dell XPS 
1530! Thanks!
It's working with Gnome Sound Recorder and in Skype perfectly!

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Rocko]

Marcus, thanks heaps! Mine now works in both sound recorder and skype as
well.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Stéphane Démurget]

Thanks Marcus, it works like a charm. Following the upstream and RedHat
trackers it does not seem the issue will be fixed anytime soon though
:-/

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[tomek.bury]

Hello Marcus,

Your solution worked for me - both M1330 and M1530 started record loud
and clear.

I guess step 3) was an important one because I've tried it previously
after your earlier post (steps 1,  2 and 2b) on M1330 and it didn't work
than.

Thanks!
Tomek

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Sachin Garg]

thnx this works for me too on

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[hendrikwout]

Thx, Marcus

Worked here also. now I can finally switch to from hardy to intrepid
which works definitally better with this laptop.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Kyle Mathews]

Marcus -- That worked perfectly. Thanks so much for solving (via a hack,
but a solution is still a solution) a problem that'd been frustrating me
for a long time.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Chris Ian Fiel]

Thanks, Marcus it works now in gnome sound recorder and skype in my m1330.


chris

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Treris]

Marcus' solution worked for me as well on a m1330 on hardy x86_64.
Thanks a lot Marcus! I do hope that the problem will be fixed out of the
box when jaunty arrives, but at least now I can use skype again without
resorting to external microphones.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Thomas]

I can confirm that the solution provided actually gives some input but
compared to alsa only (without pulseaudio) I noticed much more noise in
the recording and it sounds distorted.

I am using an increase of +25db, the +50db made the recording completely
distorted and contains only noises and clicks. I see this just a
temporary fix and somehow the whole thing worked without workarounds in
8.04 and it was loud and _clear_ then.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[tomek.bury]

Perhaps the alsa (non-pulse) "Digital" slider controls analogue
sensitivity (pre-amp)? Marcus' hack adds software amplification - post-
amp at the very end of chain. Basically it's multiplying the samples
(both captured sound and whatever noises/distortions) by some factor.
The later the amplification is done the more distortions add up to the
sound and amplifier boosts all of them equally.

The ideal solution would be to restore the original control, still
Marcus' slider is way better than bare pulse. I'd keep his solution as a
good workaround and keep the bug open until a proper solution is in
place.

Cheers,
Tomek

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[talent03]

I would have to agree with tomek.bury here. I have finally had success
with Marcus's solution, but it is still a major workaround. Recording is
bearable but not in any way optimal. I can hear clicks, distortions, and
other minor things. Bearable. This bug should be fixed... hopefully
soon, but this should suffice, for a bit. This should continue as an
open bug.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[Treris]

I agree with talent03, Marcus' solution is a workaround and not an
actual fix, this bug should not be closed.

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[Bug 275998] Re: internal mic capture very low volume when routed through pulseaudio

[mabawsa]

I wonder if this is related?
https://bugs.launchpad.net/dell/+bug/309508

Its in the new kernel 2.6.27-11.22 but I haven't got pulse installed.

Anybody tried?

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