[Alsa-user] Pops/Crackles Messing up my audio...

[Nasa <na...@co...>]

Hi,

Hi, 

I was hoping I could get some help troubleshooting some audio quality issues I am running into.  
Specifically, I am getting a lot of *pops/crackles* when I play audio files.  It shows up when I 
move from 2-channel to 4/5 channel audio (via pauvcontrol) - I am using a USB X-FI sound-card with
the Meego IVI.  

I have tried changing the resample method (going from ffmpeg to high-quality) and setting tsched=0, 
neither making any noticeable difference.

The only things I saw in /var/log/messages that seemed relevant was:
messages:Aug  6 16:59:26 localhost pulseaudio[570]: alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write!
messages:Aug  6 16:59:26 localhost pulseaudio[570]: alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA developers.
messages:Aug  6 16:59:26 localhost pulseaudio[570]: alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

And this was spout out of dmesg
[   21.857184] ALSA sound/usb/mixer.c:2110: status interrupt: c0 00
[   21.897058] ALSA sound/usb/mixer.c:2110: status interrupt: c0 00
[   21.961062] ALSA sound/usb/mixer.c:2110: status interrupt: c0 00

I have already eliminated the speakers and the amp (played music from a different source and
they sounded fine).

Let me know what else I should post (I could record the sound, if that would be useful).

Thanks in advance,

Nasa