Comment 94 for bug 428619

>> Aibara Iduas wrote on 2010-12-06: #89
   * pulseverbose.log (151.1 KiB, text/plain)

( 10.906| 0.000) D: source.c: Processing rewind...
( 12.662| 1.755) W: ratelimit.c: 16 events suppressed
( 12.662| 0.000) I: alsa-sink.c: Underrun!
( 13.279| 0.616) D: sink-input.c: Requesting rewind due to corking
( 13.279| 0.000) D: module-suspend-on-idle.c: Sink alsa_output.default becomes idle, timeout in 5 seconds.
( 13.316| 0.036) D: sink-input.c: Requesting rewind due to uncorking
( 13.316| 0.000) D: alsa-sink.c: Requested to rewind 1760 bytes.
( 13.316| 0.000) D: alsa-sink.c: Limited to 1440 bytes.
( 13.316| 0.000) D: alsa-sink.c: before: 360
( 13.316| 0.000) D: alsa-sink.c: after: 360
( 13.316| 0.000) D: alsa-sink.c: Rewound 1440 bytes.
( 13.316| 0.000) D: sink.c: Processing rewind...
( 13.316| 0.000) D: source.c: Processing rewind...
( 13.317| 0.000) D: module-suspend-on-idle.c: Sink alsa_output.default becomes busy.
( 13.322| 0.005) D: protocol-native.c: Requesting rewind due to rewrite.
( 13.322| 0.000) D: alsa-sink.c: Requested to rewind 1760 bytes.
( 13.322| 0.000) D: alsa-sink.c: Limited to 1440 bytes.
( 13.322| 0.000) D: alsa-sink.c: before: 360
( 13.322| 0.000) D: alsa-sink.c: after: 360
( 13.322| 0.000) D: alsa-sink.c: Rewound 1440 bytes.
( 13.322| 0.000) D: sink.c: Processing rewind...
( 13.322| 0.000) D: sink-input.c: Have to rewind 1440 bytes on render memblockq.
( 13.322| 0.000) D: sink-input.c: Have to rewind 1440 bytes on implementor.
( 13.322| 0.000) D: source.c: Processing rewind...
( 13.323| 0.000) D: protocol-native.c: Underrun on ''I Got It Bad and That Ain't Go' by 'Billie Holiday'', 0 bytes in queue.

It is underrun because snd_pcm_rewind() can only rewind to period boundary for those drivers which use snd_pcm_indirect_playback_transfer() since the audio has already been transferred from system memory to DSP's internal memory

your card should allow you to run multiple oss playback applications

Does "mplayer -ao oss any.wav" give your bad sound ?

**** List of PLAYBACK Hardware Devices ****
card 0: CS46xx [Sound Fusion CS46xx], device 0: CS46xx [CS46xx]
  Subdevices: 30/31
card 0: CS46xx [Sound Fusion CS46xx], device 1: CS46xx - Rear [CS46xx - Rear]
  Subdevices: 31/31
card 0: CS46xx [Sound Fusion CS46xx], device 2: CS46xx - IEC958 [CS46xx - IEC958]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: CS46xx [Sound Fusion CS46xx], device 3: CS46xx - Center LFE [CS46xx - Center LFE]
  Subdevices: 31/31

or

try pulseaudio-0.9.14