30.09.2014 14:21, David Henningsson wrote:
I did a quick test here. I have an old laptop that runs Ubuntu 12.04,
with default installed PulseAudio 1.1. Its processor is Intel Pentium M
@ 1.4 GHz [1], single core, with an AC'97 codec.
Running speaker-test will automatically cause resampling from 48 kHz
down to 44.1 kHz, as verified with "pactl list sink-inputs".
Under speex-float-1, PulseAudio consumes about 4.3% CPU. With
speex-float-3, PA consumes ~8% CPU. With speex-float-5, PA consumes ~13%
CPU.
OK. Given that Ubuntu provides the SSE2-optimized library for speex on
i386, I think that our results are comparable. Could you please also
show the actual CPU frequency, if the power-saving features of the
platform allow the kernel to decrease it?
And I think it will also be a good idea to add Windows XP to resampler
quality comparison, so that we have a desktop system that was commonly
used on this kind of CPUs.
--
Alexander E. Patrakov
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