[ALSA - driver 0001058]: CMI9880 sometimes produces distorted sound

[bugtrack@alsa-project.org]

The following issue has been UPDATED.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1058> 
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Reported By:                ahessling
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   1058
Category:                   PCI - hda-intel
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Distribution:               Gentoo
Kernel Version:             2.6.11.6
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Date Submitted:             04-16-2005 16:37 CEST
Last Modified:              04-19-2005 17:47 CEST
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Summary:                    CMI9880 sometimes produces distorted sound
Description: 
I am using the CVS version of alsa-kernel from a few days and because of
the soundchip CMI9880, I have to activate Intel HDA in the kernel.
Sound is working quite fine in stereo mode, but if I want to play a DVD
with 5.1 sound, all speakers are activated but the sound is a little bit
distorted.
xine uses plug:surround51:0 as the surround device.

My asound.conf looks like this:
pcm.!default {
type plug
slave.pcm "svol"
}

pcm.svol {
type softvol
slave.pcm "hw:0,0"
control {
name "PCM Playback Volume"
}
}

I also tried the one from http://www.sabi.co.uk/Cfg/ALSA/
Again, stereo sound works fine and also dmix does its work, but this time
I only get stereo sound in xine although the same configuration of xine is
used.

I also noticed that playing some files using aplay produces the same
distortions, e.g.:

aplay /usr/share/sounds/k3b_success1.wav
Playing WAVE '/usr/share/sounds/k3b_success1.wav' : Unsigned 8 bit, Rate
8000 Hz, Mono

Seems to have to do something with sample rate.
Using the other asound.conf from the homepage above just gives an error:
Playing WAVE '/usr/share/sounds/k3b_success1.wav' : Unsigned 8 bit, Rate
8000 Hz, Mono
aplay: set_params:857: Sample format non available
 
Is there a way to play 5.1 sound without these distortions? Maybe some
lines added to my asound.conf would do the work.

Thanks in advance!

Regards,
André
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----------------------------------------------------------------------
 tiwai - 04-19-05 17:47 
----------------------------------------------------------------------
The noise from aplay with a low-rate sample might be the bug of rate plugin
that was fixed recently.  Try 1.0.9rc2.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
04-16-05 16:37 ahessling      New Issue                                    
04-16-05 16:37 ahessling      Distribution              => Gentoo          
04-16-05 16:37 ahessling      Kernel Version            => 2.6.11.6        
04-19-05 17:47 tiwai          Note Added: 0004527                          
04-19-05 17:47 tiwai          Category                 OTHERS => PCI - hda-intel
======================================================================




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