[PD] midi problem under osx

Nicolas Montgermont nicolas_montgermont at yahoo.fr
Tue Feb 7 11:58:25 CET 2012

for archive:
the midi flow coming from the card was too high... for osx but not for win.
good news,


Le 07/02/12 10:36, Jean-Marie Adrien a écrit :
> So I cant help further ... but Ive got the same card that i use with a motor in low precision for now, on OsX !!!
> thus I might run in the same problem later !
> I will follow the link !
> :)
> JM
> Le 6 févr. 2012 à 23:20, Nicolas Montgermont a écrit :
>> thanks for your reply,
>> The problem is that midi data is a position feedback for the control of a motor, and when msb is stuck, the position command I give is wrong.
>> I don't think the card is to blame cause the same card/patch/interface is working well on win XP.
>> n
>> Le 06/02/12 21:57, Jean-Marie Adrien a écrit :
>>> Hello
>>> i would try to force synchronization of incoming midi streams inside pure data according to my needs, ie downsampling a little if necessary so that MSB and LSB are consistent ... and give a call to interface-z for feedback.
>>> cheers
>>> JM
>>> Le 6 févr. 2012 à 21:15, Nicolas Montgermont a écrit :
>>>> Hello list,
>>>> I run into a special problem with MIDI input under osx...
>>>> I am getting some MIDI inside Pd, the MIDI is coming from an interface-z card that is transducing a sensor.
>>>> The midi info is on two control number for higher (12bit) precision. Sometimes the MSB value is not updated well, but the LSB is, and that gives me weird behaviors.
>>>> I have tested the same patch with Pd-extended 0.42.5 under mac osx lion and on another computer with osx snow leopard, both have the same problem, but the same patch on a third computer with windows xp is working well.
>>>> I have tested as well two midi->usb interface (a basic one and a motu micro lite) with the same behavior.
>>>> So it seems to me that the problem looks like Pd midi driver on osx.
>>>> I have tested to modify the audio latency, to change the MIDI latency, but that gives me no better result.
>>>> Do you have an idea of where i can look, or a workaround i can find?
>>>> Best,
>>>> n
>>>> -- 
>>>> http://nim.on.free.fr
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