#262: Pulseaudio should switch sample rates when possible
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Reporter: Florob | Owner: lennart
Type: defect | Status: new
Priority: normal | Milestone:
Component: daemon | Severity: normal
Keywords: |
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I'm using pulseaudio as currently in Ubuntu Hardy Heron.
CPU usage was very high (at least 6% often 20+% on my CPU which makes
music skip etc. and it even does using speex-float-0). After some research
I found out that this is due to resampling.
My soundcard (M-Audio Audiophile 2496) seems to support using different
sample rates in hardware which you can switch using e.g. alsamixer. ALSA
always switched to the correct sample rate automatically and never had to
do any resampling it seems (or if it did at least it wasn't THAT CPU
intensive). As pulseaudio seems to be using only one fixed sample rate per
soundcard this benefit of not having to do resampling in software is gone.
If possible this should be changed.
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Ticket URL: <http://www.pulseaudio.org/ticket/262>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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