[Sugar-devel] [Csnd] Re: Re: Re: Re: csound on Fedora 11 and rawhide
sayamindu at gmail.com
Tue Sep 8 14:18:33 EDT 2009
On Tue, Sep 8, 2009 at 9:16 PM, Paul Fox<pgf at laptop.org> wrote:
> peter wrote:
> > On Tue, Sep 8, 2009 at 4:23 PM, Art Hunkins<abhunkin at uncg.edu> wrote:
> > > Victor, I understand you to be saying that pulseaudio exhibits more latency
> > > than ALSA.
> > >
> > > If this is so, why are we making pulseaudio the default for SoaS - where
> > > most audio will be realtime?
> > Because that's what Fedora and most other distros are moving to. Also
> i think using pulseaudio on a distro which is almost by definition
> aimed at under-powered machines is a mistake. it's a very expensive
> subsystem, performance-wise. i seem to recall seeing it take 10% of
> a 1Ghz system.
I've heard that fiddling around with the value of resample-method in
/etc/pulse/daemon.conf can lower the CPU usage somewhat.
On a side-note, enabling PA would, on a immediate basis cause problems
with Squeak, and as a result, Etoys and Scratch
(http://bugs.squeak.org/view.php?id=7328). I've heard from the Scratch
developers that someone is working on PulseAudio support, and I have
some half baked code lying around to do the same, but right now the
only alternative is to use Squeak's OSS driver, which seems to crash
during recording operations.
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