[PD] midiout restricted to 16 channels

[IOhannes m zmoelnig]

IOhannes m zmoelnig wrote:
> 
> yesterday i ran into the very same problem (that connecting 4 MIDI
> devices will give me 64 midi-IN channels but only 16 midi-OUT channels)
> a quick look at the code revealed, that somebody is doing
>  channel &= 0xF;
> which explains a lot.
> 

actually it explains nothing; it was just a misunderstanding of the code
on my side.


> before i try to start fixing this code, i wanted to ask whether you have
> already done so and what the current status of this is.
> 
> i am using pd-0.38-4 with the alsamidi-patches, but the problem should
> be the very same with any MIDI-OUT.

to get multiple midi-outputs work with ALSA, you have to change one line
in s_midi_alsa.c in the sys_putmidimess() function:
change
  snd_seq_ev_set_source(&ev,alsa_midioutfd[0]);
to
  snd_seq_ev_set_source(&ev,alsa_midioutfd[portno]);

OR apply the attached patch.


note: of course this only applies if you have alsa-midi enabled (as can
be done with the patches at sf.net/projects/pure-data)

mfg.adsr
IOhannes
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