[PD] MIDI In-to-Out Latency

Ingo Scherzinger ingo at miamiwave.com
Sun Jun 6 19:08:27 CEST 2010

Looks like there are some problems with the soundcard drivers.
I'm running very heavy patches with 3 ms. Both on Windows XP and Ubuntu.
Audio and MIDI.
However, on Windows I am using a RME HDSP card which has very good ASIO
drivers. Don't forget to set system options to "background tasks" (very
I also noticed that in general Intel CPUs are pretty bad for Pd since they
use hyperthreading which makes Pd see two CPUs and uses only 50% of one
core. AMDs are twice as efficient because Pd uses the entire core.


> cyrille henry wrote:
> > but since you don't like this, you should : in pd / startup
> > add in "startup flags" :
> > -noaudio -audiobuf 0 -mididev 3
> > than : "save all setting" and it should work for next reboot...
> >
> That's fine but what if you want to trigger sound with the MIDI input?
> I've been trying some settings and find that if I set the delay less
> than 100ms the MIDI delay goes up to about 500ms, if it works at all.
> I usually only use Pd on WinXp to generate background tracks since the
> latency is so awful compared to linux.
> Martin

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