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
