I noticed the sound coming from my mediacenter wasn't quite clear.
To have a higher sound quality you need to edit /etc/pulse/daemon.conf.
The resample-method = line can have following values:
src-sinc-best-quality, src-sinc-medium-quality, src-sinc-fastest, speex-float-{10-0}, speex-fixed-{10-0}, ffmpeg, src-zero-order-hold, src-linear, trivial
The first value is the best quality but uses the most cpu time. Please try different values to find a good balance between sound quality and cpu usage.
For me, on a Intel(R) Atom(TM) CPU D525 @ 1.80GHz, src-sinc-best-quality was a too high setting, but src-sinc-medium-quality worked fine. By default the setting is speex-float-3.
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