[PD] latency results?

Andrew (Andy) W. Schmeder andy at e-molecule.com
Thu Jun 13 07:07:45 CEST 2002


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





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