[PD] latency results?

[Miller Puckette]

Hi all,

I get the same results: "audiobuf" must be at least 12 for me.

Also, there's probably 3 more milliseconds of latency in the audio
hardware if not more.

Have you tried running at 96 kHz?  That should cut it in half.

I don't know if the 8-buffer minimum is a Pd thing or a driver thing but
I suspect the latter...

cheers
Miller

On Wed, Jun 12, 2002 at 10:07:45PM -0700, Andrew (Andy) W.  Schmeder wrote:
> Hi all,
> 
> I'm trying to fine tune the latency for a pd/realtime setup.
> 
> The system:
> Debian/Unstable
> Intel P4 1.8ghz
> M-Audio Delta-44 (ice1712 driver)
> Alsa 0.9
> Kernel 2.4.19-pre10 + A. Morton's latest Low-Latency patch
> 
> echo 1 > /proc/sys/kernel/lowlatency
> pd -alsadev hw:0,0 -rt
> 
> So far PD's best possible latency is 8 fragments (11 millisec. audio
> buffer).  Below this it is completely unable to keep up.
> 
> Is there room for improvement in this setup?  (Replacing the sound
> device is an option...  I need as many channels as possible and latency
> in the 1-3 ms range).
> 
> --
> Andy
> 
>