From: bugtrack@alsa-project.org
To: alsa-devel@alsa-project.org
Subject: [ALSA - driver 0001210]: Exaudio produces noise on all speakers for 5.1 channels
Date: Wed, 24 Aug 2005 00:50:27 +0200 [thread overview]
Message-ID: <f2315ddc91c090119646d12d35c2a4ec@bugtrack.alsa-project.org> (raw)
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1210>
======================================================================
Reported By: andersin
Assigned To: Clemens Ladisch
======================================================================
Project: ALSA - driver
Issue ID: 1210
Category: USB - usb-audio
Reproducibility: always
Severity: minor
Priority: normal
Status: assigned
Distribution:
Kernel Version:
======================================================================
Date Submitted: 06-23-2005 23:54 CEST
Last Modified: 08-24-2005 00:50 CEST
======================================================================
Summary: Exaudio produces noise on all speakers for 5.1
channels
Description:
I am using a soundblaster extigy with ALSA ver. 1.0.9b and am happy to say
that stereo sound works find and that all 6 speakers can produce some
sound.
With more than 2 channel output, I experience problems. speaker-test,
which
works for 1 and 2 channels, results in a hissing/crackling for 3,5,6
channels, which changes in pitch depending on the number of channels. For
4
channels, it loops, producing the following output
speaker-test 0.0.8
Playback device is extigy
Stream parameters are 48000Hz, S16_LE, 4 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 96 to 8192
Period size range from 48 to 4096
Periods = 4
Buffer time size 2525
To choose buffer_size = 8192
To choose period_size = 2048
was set period_size = 2048
was set buffer_size = 8192
Unable to set hw params for playback: Invalid argument
Setting of hwparams failed: Invalid argument
Rate set to 48000Hz (requested 48000Hz)
[ The "Rate set to ..." part is repeated continuously ]
Setting my capture device to mixer, I was able to record the output with
arecord -c 6 -f dat -r 48000 /root/speaker-test-6ch.wav . The distortion
is
still present when playing the file, forcing 2 channels in aplay.
In addition to using speaker test, I tried using the route plugin to
isolate
the rear channels. When I route to any channel, I can hear the same output
on
all 5 (not sure about Woofer) channels, no matter which channel I route
to.
Here is the relevant setup:
pcm.route1 {
type route;
slave.pcm "extigy";
slave.channels 6;
ttable.0.0 1.0;
}
The music that I played had similar distortions like the one for speaker
test
and played considerably slower than when player with 2 channels. Again I
could record and replay the effect. The setup was slightly different in
order
to route the stereo channels to all 6 speakers.
For routing with 4 slave channels, I get a failure (as expected), this
time
with the output:
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz,
Stereo
aplay: set_params:910: Unable to install hw params:
ACCESS: RW_INTERLEAVED
FORMAT: S16_LE
SUBFORMAT: STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 48000
PERIOD_TIME: (42666 42667)
PERIOD_SIZE: 2048
PERIOD_BYTES: 8192
PERIODS: 4
BUFFER_TIME: (170666 170667)
BUFFER_SIZE: 8192
BUFFER_BYTES: 32768
TICK_TIME: 1000
This is all the relevant bits that I can think of at the moment. Thank you
for
reading this far. If anybody thinks it is important to get the recorded
files, I am happy to sent them. I am grateful for any nudge on what I am
doing wrong with my setup.
Christoph Burger-Scheidlin
======================================================================
----------------------------------------------------------------------
andersin - 06-24-05 17:47
----------------------------------------------------------------------
I added two files, each representing one complete iteration of the
speaker-test program. I hope the files are small enough.
----------------------------------------------------------------------
andersin - 08-24-05 00:50
----------------------------------------------------------------------
Hmm, nothing happened in a while. Reading over the comments, I think I gave
you the wrong files. I downloaded some ac3 test files and decoded them
using ac3dec -6 -D extigy. The file I uploaded is a recording of the two
front speakers.
Issue History
Date Modified Username Field Change
======================================================================
06-23-05 23:54 andersin New Issue
06-24-05 09:21 Clemens LadischFile Added: alsa-lib-start-threshold-check.diff
06-24-05 09:22 Clemens LadischFile Deleted: alsa-lib-start-threshold-check.diff
06-24-05 09:23 Clemens LadischNote Added: 0005205
06-24-05 10:14 andersin File Added: stream0.txt
06-24-05 10:16 andersin Note Added: 0005208
06-24-05 10:25 Clemens LadischNote Added: 0005209
06-24-05 13:38 andersin Note Added: 0005218
06-24-05 15:23 andersin Note Edited: 0005218
06-24-05 17:22 Clemens LadischNote Added: 0005239
06-24-05 17:44 andersin File Added: speaker-test-6ch.mp3
06-24-05 17:44 andersin File Added: speaker-test-2ch.mp3
06-24-05 17:47 andersin Note Added: 0005242
08-24-05 00:50 andersin Note Added: 0005920
======================================================================
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next reply other threads:[~2005-08-23 22:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-23 22:50 bugtrack [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-03-11 15:23 [ALSA - driver 0001210]: Exaudio produces noise on all speakers for 5.1 channels bugtrack
2005-08-23 23:03 bugtrack
2005-06-24 15:47 bugtrack
2005-06-24 15:22 bugtrack
2005-06-24 11:38 bugtrack
2005-06-24 8:25 bugtrack
2005-06-24 8:16 bugtrack
2005-06-24 7:23 bugtrack
2005-06-23 21:54 bugtrack
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