[Bug 424558] [NEW] Crunchy/garbled audio

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Binary package hint: pulseaudio

Symptom: When multiple applications try to play sound spontaneously,
audio becomes extremely garbled and distorted.

For example, if I'm listening to music in Rhythmbox and then some other
application attempts to play sound (Flash-video in firefox, Pidgin
notifies about a message, whatever) the audio becomes incredibly
distorted while this occurs, and after the secondary application has
stopped it returns to normal.

This happens when I have set output (Profile in Sound preferences) to
virtually anything except Analog Stereo. When set to Analog Stereo,
everything works as expected. If I set it to output 5.1 Analog Surround
the distortion occurs.

This is extremely annoying since my preferred output is analog 5.1
surround.

This is also completely reproducible.

My soundcard is a Soundblaster Audigy2 ZS.

Output from aplay -l ; grep Codec /proc/asound/card0/codec#0

**** List of PLAYBACK Hardware Devices ****
card 0: Audigy2 [SB Audigy 2 ZS [SB0350]], device 0: emu10k1 [ADC Capture/Standard PCM Playback]
  Subdevices: 31/32
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
  Subdevice #8: subdevice #8
  Subdevice #9: subdevice #9
  Subdevice #10: subdevice #10
  Subdevice #11: subdevice #11
  Subdevice #12: subdevice #12
  Subdevice #13: subdevice #13
  Subdevice #14: subdevice #14
  Subdevice #15: subdevice #15
  Subdevice #16: subdevice #16
  Subdevice #17: subdevice #17
  Subdevice #18: subdevice #18
  Subdevice #19: subdevice #19
  Subdevice #20: subdevice #20
  Subdevice #21: subdevice #21
  Subdevice #22: subdevice #22
  Subdevice #23: subdevice #23
  Subdevice #24: subdevice #24
  Subdevice #25: subdevice #25
  Subdevice #26: subdevice #26
  Subdevice #27: subdevice #27
  Subdevice #28: subdevice #28
  Subdevice #29: subdevice #29
  Subdevice #30: subdevice #30
  Subdevice #31: subdevice #31
card 0: Audigy2 [SB Audigy 2 ZS [SB0350]], device 2: emu10k1 efx [Multichannel Capture/PT Playback]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: Audigy2 [SB Audigy 2 ZS [SB0350]], device 3: emu10k1 [Multichannel Playback]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Audigy2 [SB Audigy 2 ZS [SB0350]], device 4: p16v [p16v]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
grep: /proc/asound/card0/codec#0: No such file or directory

I'm running Karmic Koala, installed as Alpha4 but patched and updated to
everything latest as of September 4th, when writing this.

ProblemType: Bug
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  isecore    4306 F.... pulseaudio
 /dev/snd/pcmC0D0p:   isecore    4306 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Audigy2'/'SB Audigy 2 ZS [SB0350] (rev.4, serial:0x20021102) at 0xcf00, irq 20'
   Mixer name	: 'SigmaTel STAC9750,51'
   Components	: 'AC97a:83847650'
   Controls      : 211
   Simple ctrls  : 46
Date: Fri Sep  4 22:01:16 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: pulseaudio 1:0.9.16~test6-3-g57e1-0ubuntu2
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-9.29-generic
SourcePackage: pulseaudio
Uname: Linux 2.6.31-9-generic x86_64

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug
-- 
Crunchy/garbled audio
https://bugs.edge.launchpad.net/bugs/424558
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