[PD] sysex messages

[Miller Puckette]

This seems to be a specific problem with sysex-handling using linux/ALSA...
if you're using 'OSS' MIDI back end it should work fine.

Incidentally, I think the best fix would be to start using portmidi to address
linux/ALSA.

(An easier one would be to just use OSS but there are features in the ALSA
driver such as loopback that I think you can't get in OSS emulation, so
some MIDI users on linux are forced into the ALSA API.

cheers
Miller

On Wed, Mar 14, 2018 at 10:49:28PM +0100, Simon Iten wrote:
> hi there,
> 
> i have sent sysex with puredata for some years now, and i never had any problems, even with large chunks.
> i have used attached abstraction to send sysex, maybe it helps?
> 
> midi IS a serial protocol, so it is perfectly valid to send one byte at a time at least over din midi. in fact i am doing that with arduinos all the time.  (usb midi is a different beast) 
> 
> do the “special” midiout noteon and noteoff messages work when a synthmodule or similar is connected?
> 
> 
> > On 14 Mar 2018, at 21:28, mario buoninfante <mario.buoninfante at gmail.com> wrote:
> > 
> > Hi Miller,
> > 
> > yap I'm using ALSA. 
> > btw, I had a look at the source code (I want to clarify I'm not a C programmer :) ) and from what I found in x_midi.c and s_midi.c, it kind of make sense that [midiout] returns 1 byte at time.
> > 
> > it seems to me we're missing a way to detect outgoing sysex messages (maybe having a dedicated object could help), so there's no way to collect a sysex and send it out in one go (ie having an array to return). I apologize for my trivial description of the "problem", but this is what I think is causing this behaviour.
> > 
> > 
> > 
> > cheers,
> > 
> > Mario
> > 
> > 
> > On 13/03/18 04:37, Miller Puckette wrote:
> >> Hi Mario -
> >> 
> >> Perhaps you said this in the previous message which I missed... are you
> >> using ALSA MIDI system or OSS?
> >> 
> >> MIDI support has always been a problem in Pd... largely because I don't have
> >> a lot of experience with it.
> >> 
> >> cheers
> >> Miller
> >> 
> >> On Tue, Mar 13, 2018 at 12:04:00AM +0000, mario buoninfante wrote:
> >>> Hi,
> >>> 
> >>> 
> >>> I ran few more tests on Linux trying to understand what's going on with
> >>> [midiout] and sysex messages.
> >>> 
> >>> I discovered that it's not just about sysex. I'm monitoring MIDI from Pd
> >>> with /KMidimon /and /GMIDImonitor/, and I noticed that also sending Note On
> >>> messages with [midiout] seems to be in some way different then sending the
> >>> same message using [noteout].
> >>> 
> >>> when Note On is sent using [midiout], this will spit single bytes that are
> >>> recognized as single byte sysex messages by the MIDI monitors!!!!!
> >>> 
> >>> has anyone ever experienced the same?
> >>> 
> >>> 
> >>> cheers,
> >>> 
> >>> Mario
> >>> 
> >>> 
> >> 
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