On Wed, 2009-07-29 at 15:26 +0200, Michal Hlavinka wrote: > > If PA eats a lot of CPU this can have many reasons, most of them have > > to do with the latency settings requested by the applications or that > > have been configured due to frequent underruns. However the actual > > mixing is certainly the smallest part of it. Plese don't forget that > > mixing is not exactly the most complex operation on earth. > > Well... I'm pretty sure I have no idea how it works :D I've just noticed that > when playing stereo and sound card (Aureon MK II) is configured for stereo, it > eats about 4 % and (when speakers are set as 5.1) only front speakers work (as > expected), when I configure that card for 5.1 output and play stereo stream it > goes to all 5.1 speakers and eats about 24 % of cpu That's not mixing, it's multiplexing. I don't think any card has ever had hardware acceleration for that operation (though hey, I'm probably wrong ;>). Mixing is what happens when you play sound from two or more applications at once. -- Adam Williamson Fedora QA Community Monkey IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org http://www.happyassassin.net -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
