[PD] midi syncro

Miller Puckette mpuckett at man104-1.ucsd.edu
Wed May 9 18:54:52 CEST 2001

Hi dh,

I've never measured MIDI timing stability in W98, but in general Pd doesn't
time MIDI I/O carefully in either NT or Linux; output gets sent at the time
teh audio is COMPUTED, not when the audio actually appears on the output.
To reduce MIDI jitter, you can reduce audio latency to the lowest amount
Pd can stand.  I think you should be able to get jitter down to 5-10 msec
this way in W988 (it will be worse than this, probably, in NT or W2000).


On Tue, May 08, 2001 at 11:07:04PM +0200, HENRY Damien wrote:
> Dear list.
> I'm running PD31 on Win98 (PIII 650 - 128mo Ram). Of course I envoy it ;-)
> I'm creating  rythms with PD : I use in the same time midi in to receive
> parameters and midi out to send note coresponding to the rythme... Many
> fun...
> It's only midi processing so i turn audio calculation off.
> My problem apear when i have an  heavy load on midi : the rythme became not
> regular !!!
> What can help me ?
> 1) win NT instead of 98 ?
> 2) linux ?
> 3) PD32.6 instead of PD31 ?
> 4) change the soundcard (SB live today)
> 5) change the block size and overlap (I guess that midi is related to the
> block size)
> 6) change the PC ?
> 7) other idea ???
> thanks.
> dh.

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