[PD] Getting Sysex output to work on Linux

Miller Puckette mpuckett at imusic1.ucsd.edu
Sun May 25 20:12:24 CEST 2008

Is it out of the question simply to use the OSS MIDI API?  That should
be the default, and it's much less buggy than the ALSA one.  (Apparently,
though, there's sometimes a good reason to use teh ALSA one instead, I
remember vaguely.)

To put out "sysex" MIDI, theoretically in either ALSA or OSS, send the 
bytes out serially, as in "247, NN, NN, 240", not in a list as in
"247 NN NN 240".


On Mon, May 26, 2008 at 02:20:19AM +0900, PSPunch wrote:
> Hi,
> I am hoping someone can give me advise on getting my Ubuntu box to send
> sysex message over MIDI.
> Some questions..
> 1)
> What is the proper format for messages to go into [midiout] or [sysexout]?
> Do I make a list of numbers such as
> [247 NN .. .. .. NN 240<
> or do I need to serialize them as [sysexin] receives each byte as
> individual messages?
> 2)
> Previous posts on the same topic were a bit too vague for me to catch up
> with. Although I use Debian & Ubuntu daily, unfortunately I am not
> fluent in developing practices enough to design my own workarounds (at
> least not yet).
> The closest I could get was the understanding that there is no method to
> get Sysex output to work other than patching Pd so a different kind of
> function in ALSA-API will be used. (also that the current releases have
> a 20 byte limit. This is probably not my case though)
> If current pd-extended (which I am comfortable with, either stable or
> testing) needs patching in order for midiout to work, I would highly
> appreciate specific procedures on how to get it going, hopefully on a
> fresh installation of Ubuntu 8.04 or 7.10.
> Any type of help appreciated.
> Thanks.
> --
> David Shimamoto
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