ZynAddSubFX was: Re: [linux-audio-dev] some new soundfiles on-line

Lee Revell rlrevell at joe-job.com
Fri May 13 21:41:18 UTC 2005

On Fri, 2005-05-13 at 23:34 +0200, Florian Schmidt wrote:
> On Fri, 13 May 2005 17:02:42 -0400
> Lee Revell <rlrevell at joe-job.com> wrote:
> > > paul knows that zyn is not RT-safe. he had several conversations with
> > > me at LAC2005 about how to redesign the internals. it works fine at
> > > larger latencies.
> > 
> > Judging from those messages, it seems like it should certainly work at
> > 128 frames, maybe 64.  But 32 is insanely low - too low for most sound
> > hardware.  That setting is more appropriate for stress testing the
> > kernel, than for actual music making.
> I beg to differ. Especially because some AD/DA's introduce quite a bit
> of additional latency. When i used my cs46xx based card i had to go down
> to 32 frames to get an acceptable latency for playing my guitar through
> jack-rack. I once measured the roundtrip latency of this card and found
> out my AD/DA's added another 4-5ms of latency to the 1.333ms latency
> which were caused by the periodsize of 32 frames. And it seems 6ms total
> latency was fine for me :)

Well, my point was really that it will depend a lot on the soundcard.
RME can't go below 64 at all.  My emu10k1s can do 32 in playback only
mode but need to use 64 for full duplex.  Etc...


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