Comment 4 for bug 434042

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David Henningsson (diwic) wrote : Re: [karmic] pulseaudio distorded sound

Okay, that was interesting, probably your sound card / ALSA drivers fail to report proper hardware dB volumes. Can you load the alsa-sink module with ignore_dB=1? To do that, edit /etc/pulse/default.pa and make sure you have a line looking like this:

load-module module-alsa-sink ignore_dB=1

then restart the pulseaudio sound server:

echo autospawn = no|tee -a ~/.pulse/client.conf
killall pulseaudio
pulseaudio -vvvv

Can you then report back with the new log? Thanks!