Re: 2.5.74-mm1

From: Daniel Phillips (
Date: Mon Jul 07 2003 - 19:13:53 EST

On Tuesday 08 July 2003 00:03, Davide Libenzi wrote:
> > > Try to play with SNDCTL_DSP_SETFRAGMENT. Last time I checked the kernel
> > > let you set a dma buf for 0.5 up to 1 sec of play (upper limited by
> > > 64Kb). Feeding the sound card with 4Kb writes will make you skip after
> > > about 50ms CPU blackout at 44KHz 16 bit. RealPlayer uses 16Kb feeding
> > > chunks that makes it able to sustain up to 200ms of blackout.
> >
> > That's just fiddling, it doesn't deal with the basic problem. Anyway,
> > big buffers have their own annoyances. Have you tried the graphic
> > equalizer in xmms lately? A one second lag on slider adjustment is not
> > nice.
> That's not fiddling. It is tuning your app so that it won't require
> realtime when it is not needed.

But realtime is needed, because there is a deadline for each buffer-fill.



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