Le 29/01/2013 15:17, Raffaele Morelli a écrit :
2013/1/29 dAgeCKo <dage...@free.fr <mailto:dage...@free.fr>>
Hello,
I am currently facing a strange problem with ALSA and Jack. I play
electric guitar sometimes and I use my computer as a medium to
output the sound. For this, I use jack, with alsa as the driver.
Half of the time, everything is just fine, the audio output of my
guitar is just what it should be.
However, sometimes, the sound is completely low, distorted and with
a lot of cracklings and looks to have been produced by an awful and
very old synthesizer.
Most of the time this is happening after I have been watching videos
with mplayer2 (threw smplayer). But strangely enough, this doesn't
happen any times after this.
I have been looking toward to reproduce this, but unfortunately with
no success at all. So I know this won't help to find where the bug
is, but if it is an already well known one (I have very few hopes
for this).
For more information, here is my system:
Debian Wheezy AMD64 (with some i386 programs installed as multiarch
so that my printer works), up-to-date, running the latest available
kernel (amd64, no rt).
Graphical environment is XFCE so that I don't have pulseaudio (it is
well known, and I could confirm this, that pulseaudio does not live
well with jack). However, I still have some pulseaudio libs
installed (due to dependencies): libpulse0 (too many dependencies),
libpulse-mainloop-glib0 (for kdevelop, which then needs libphonon).
My sound card is:
02:00.0 Audio device: Creative Labs X-Fi Titanium series [EMU20k2]
(rev 04)
Subsystem: Creative Labs SB X-Fi Titanium PCI-e [SB0880]
Flags: bus master, fast devsel, latency 0, IRQ 44
Memory at fe200000 (64-bit, non-prefetchable) [size=64K]
Memory at fe000000 (64-bit, non-prefetchable) [size=2M]
Memory at fd000000 (64-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: snd_ctxfi
About the softwares:
jd@entropia:~$ jackd --version
jackd version 0.122.0 tmpdir /dev/shm protocol 24
jd@entropia:~$ jack --version
This is jack 3.1.1 (C)2004 Arne Zellentin <za...@users.sf.net
<mailto:za...@users.sf.net>>
Thanks for any kind of help in advance.
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check input levels with alsamixer, the app you are using can change
input levels.
are you using guitarix or what?
I use nothing else. Levels are OK.
If it was only the volume levels I won't have such awful noise that has
very few to do with my guitar sound.
-r
PS jack has nothing to do with jackd
Yes, sorry for this, I did it quickly and didn't pay attention if this
program was related to jackd or not. But I know I never use it, only
jackd threw qjacktl.
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