[PD] MIDI input problems in PD

Pierre-Olivier Boulant po.boulant at free.fr
Sun Feb 26 22:58:30 CET 2012

I had the same problem without Midi-Ox too.


On 26/02/2012 22:28, Ingo wrote:
> I was using MIDI OX as well. I wonder if Laura did.
> If yes, it could be related to MIDI OX as well.
> Ingo
>> -----Ursprüngliche Nachricht-----
>> Von: pd-list-bounces at iem.at [mailto:pd-list-bounces at iem.at] Im Auftrag von
>> Miller Puckette
>> Gesendet: Sonntag, 26. Februar 2012 22:11
>> An: Pierre-Olivier Boulant
>> Cc: PD-List
>> Betreff: Re: [PD] MIDI input problems in PD
>> Drat, I can't reproduce this yet... I don't have any real MIDI devices,
>> just USB keyboards that fake MIDI, so perhaps I need to track down an
>> old-fashioned MIDI device somewhere :)
>> M
>> On Sun, Feb 26, 2012 at 08:15:32PM +0100, Pierre-Olivier Boulant wrote:
>>> Hi,
>>> I have the same problem. It affects several computers running XP,
>>> Vista or Win7 and several Midi controllers; either connected to a
>>> RME multiface or through USB (Korg NanoPad / Berinhger BCR2000 or
>>> BCF2000 / Akai LPD8). Mostly using CC, hardly Midi-notes. And most
>>> of the time I go through Midi-Ox and a virtual midi port (midi yoke)
>>> to merge all controllers before sending to Pd. Midi-Ox checks for
>>> looping and should be able to prevent it and my patches try to limit
>>> looping and Midi data flow too.
>>> It does look like there is some overflow of the midi I/O buffers.
>>> I tend to limit the flow of data outgoing with [speedlim] and have a
>>> separate sessions of Pd for the control/GUI and audio with the
>>> audio/midi properties set differently between the two sessions.
>>> For me it happens after big rushes of data: if I instantiate all the
>>> parameters of a BCR2000 at once (over 100 parameters) at the same
>>> time as updating the GUI in Pd it's not that hard to overload the
>>> midi buffers and create this problem and it doesn't take two hours
>>> to crash then... :)
>>> And if you send a lot of stuff from the controllers too then it can
>>> lead to the same issue.
>>> I'm not sure it's only the flow of midi data, but it could be the
>>> Midi data plus a lot of processing in Pd, especially with GUI
>>> objects moving in response to the Midi input.
>>> Re-instantiating the Midi-settings seems to flush the buffers, but
>>> sometimes it takes a reboot to make the problem go away once
>>> everything is stuck.
>>> Cheers
>>> Pierre-Olivier
>>> On 26/02/2012 08:28, Ingo wrote:
>>>> I had the same problem with Windows XP and a RME Hammerfall DSP card
>> using
>>>> only the normal [notein], [ctlin], [toutchin] and [pgmin] for a
>> sampling
>>>> synth. I don't think it's the midi interface. RME has some of the best
>>>> drivers - very stable.
>>>> Sometimes after a certain amount of time it started playing notes by
>> itself
>>>> and didn't seem to stop anymore. It sounded like notes or melodies that
>> I
>>>> had been playing before. Nothing random.
>>>> Could it be possible that midi data is written into a buffer that does
>> not
>>>> get emptied anymore? Then something might trigger reading out that
>> buffer?
>>>> I couldn't recreate why it happened. Most of the time it didn't do it
>> but
>>>> every once in a while it did.
>>>> I had no problem ever running Nuendo for days on that same machine
>>>> programming midi. The same Pd patch was doing fine on a Linux computer
>> after
>>>> switching to Linux.
>>>> Ingo
>>>>> -----Ursprüngliche Nachricht-----
>>>>> Von: pd-list-bounces at iem.at [mailto:pd-list-bounces at iem.at] Im Auftrag
>> von
>>>>> Miller Puckette
>>>>> Gesendet: Sonntag, 26. Februar 2012 00:04
>>>>> An: Villa Anna
>>>>> Cc: pd-list
>>>>> Betreff: Re: [PD] MIDI input problems in PD
>>>>> I haven't seen this problem, but I have to admit I don't think I ever
>>>>> ran MIDI into a Windows machine for more than 2 hours at a time (back
>>>>> when I acually used MIDI Windows itself wasn't stable enough to run
>> for
>>>>> that long at a time :)
>>>>> It's hard to know whether this is the MOTU driver misbehaving in
>> windows 7
>>>>> or something with Pd itself - my only suggestion would be to try
>> either
>>>>> (1) switching interfaces to something more modern than 828MKII or (2)
>>>>> try using some other software to see if the problem is specific to PD.
>>>>> cheers
>>>>> Miller
>>>>> On Sat, Feb 25, 2012 at 11:03:32AM +0100, Villa Anna wrote:
>>>>>> Dear list,
>>>>>> I have problems with Midi input in PD.
>>>>>> I use Windows 7 and make use of a Motu 828MKII soundcard.
>>>>>> I receive MIDI via a polytouchin object (make use of FSRs and a
>> coridium
>>>>>> armmite to translate pressure on the FSRs to Midi messages).
>>>>>> All goes fine in the beginning, but sometimes after a while (f.e. 2
>>>>> hours)
>>>>>> my Midi input starts to be random (FSRs trigger that are not supposed
>> to
>>>>> be
>>>>>> triggering). If I restart PD everything is back to normal. Any idea
>> what
>>>>>> the cause of this problem might be?
>>>>>> It's an installation project so it is difficult to restart everything
>>>>> from
>>>>>> time to time.
>>>>>> Thanks in advance for your help!
>>>>>> Laura
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