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Today's Topics:
1. Openmoko Bug #2282: freerunner with gsmhandset-a7.state sends
more quiet audio than nokia 6610i (Openmoko Public Trac)
2. Re: Openmoko Bug #2121: [audio] new alsa state for A7
(Openmoko Public Trac)
3. Re: Openmoko Bug #2282: freerunner with gsmhandset-a7.state
sends more quiet audio than nokia 6610i (Openmoko Public Trac)
--- Begin Message ---
#2282: freerunner with gsmhandset-a7.state sends more quiet audio than nokia
6610i
-----------------------------+----------------------------------------------
Reporter: lindi | Owner: openmoko-kernel
Type: defect | Status: new
Priority: normal | Milestone:
Component: System Software | Version: unspecified
Severity: normal | Keywords: alsa call quality
gsmhandset.state
Haspatch: 0 | Blockedby:
Estimated: | Patchreview:
Blocking: | Reproducible:
-----------------------------+----------------------------------------------
I made a series of testcalls to objectively compare freerunner with
gsmhandset-a7.state from http://docs.openmoko.org/trac/ticket/2121 to
nokia 6610i. To me it seems that freerunner sends more quiet audio, maybe
the default alsa state should be improved somehow?
Test setup:
1) laptop that plays test-message.flac using its internal speaker
2) mobile phone that is 5 cm away from the laptop. In this test the phone
is either GTA02V5 with buzzfix or nokia 6610i.
3) linphone voip client connected to my VOIP provider
4) What I do is: call the phone with linphone and play audio from laptop
to the phone so that linphone can record what gets sent to GSM network.
5) I did this test with both phones and in a quiet room and also in a room
where a TV set provides extra background noise.
Results:
sox sample-3af07def.wav dummy.wav stat
{{{
Samples read: 314944
Length (seconds): 39.368000
Scaled by: 2147483647.0
Maximum amplitude: 0.207062
Minimum amplitude: -0.191376
Midline amplitude: 0.007843
Mean norm: 0.001523
Mean amplitude: 0.000122
RMS amplitude: 0.006678
Maximum delta: 0.328094
Minimum delta: 0.000000
Mean delta: 0.001737
RMS delta: 0.009205
Rough frequency: 1754
Volume adjustment: 4.829
}}}
sox sample-61ca9657.wav dummy.wav stat
{{{
Samples read: 335755
Length (seconds): 41.969375
Scaled by: 2147483647.0
Maximum amplitude: 0.546875
Minimum amplitude: -0.578186
Midline amplitude: -0.015656
Mean norm: 0.003382
Mean amplitude: 0.000151
RMS amplitude: 0.017334
Maximum delta: 0.960968
Minimum delta: 0.000000
Mean delta: 0.004671
RMS delta: 0.026990
Rough frequency: 1982
Volume adjustment: 1.730
}}}
As you can see the maximum amplitude is
10*log(0.546 / 0.2070)/log(10) = 4.2 dB higher with nokia than with
freerunner.
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/2282>
docs.openmoko.org <http://docs.openmoko.org/trac/>
openmoko trac
--- End Message ---
--- Begin Message ---
#2121: [audio] new alsa state for A7
---------------------------+------------------------------------------------
Reporter: wendy_hung | Owner: zecke
Type: defect | Status: closed
Priority: high | Milestone:
Component: Audio | Version:
Severity: critical | Resolution: fixed
Keywords: | Haspatch: 0
Blockedby: | Estimated:
Patchreview: | Blocking:
Reproducible: |
---------------------------+------------------------------------------------
Comment(by alphaone):
Joerg said:
<DocScrutinizer>
http://docs.openmoko.org/trac/attachment/ticket/2121/gsmhandset.state.new
IS THE ONE *REAL* STATEFILE
I agree. gsmhandset-a7.state is wrong
Setting Mic2 Capture Volume to 0 in order to reduce echo is NOT the right
solution.
Please use gsmhandset.state.new
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/2121#comment:3>
docs.openmoko.org <http://docs.openmoko.org/trac/>
openmoko trac
--- End Message ---
--- Begin Message ---
#2282: freerunner with gsmhandset-a7.state sends more quiet audio than nokia
6610i
---------------------------------------------------+------------------------
Reporter: lindi | Owner:
openmoko-kernel
Type: defect | Status: closed
Priority: normal | Milestone:
Component: System Software | Version:
Severity: normal | Resolution: invalid
Keywords: alsa call quality gsmhandset.state | Haspatch: 1
Blockedby: | Estimated:
Patchreview: | Blocking:
Reproducible: |
---------------------------------------------------+------------------------
Changes (by joerg):
* status: new => closed
* haspatch: 0 => 1
* version: unspecified =>
* resolution: => invalid
Comment:
setting to invalid, haspatch
until tests are done with correct statefile and clearly show the issue of
"other people can't hear me".
"4.2 dB higher" is near to HiFi spec of +/-3dBm
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/2282#comment:1>
docs.openmoko.org <http://docs.openmoko.org/trac/>
openmoko trac
--- End Message ---
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