[Sugar-devel] [Csnd] Re: Re: Re: Re: csound on Fedora 11 and rawhide

[Sayamindu Dasgupta]

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.

Thanks,
Sayamindu



-- 
Sayamindu Dasgupta
[http://sayamindu.randomink.org/ramblings]