heylo,
i want to make an editor for my yamaha dx 21. As i read on this forum there are some problems with midi running on mac i can assure pure data transfers midi signals to my synth, with signals i mean the light of the interface flickering..

So i took the binnary sysex code, theone i want to send to my dx 21, and dropped this in a messagebox. I connect it straid to a midiout.
I press the messagebox, midi goes out (believing the lights on my interface) but nothing changes in my dx 21...

this is the code i use to control the frequency of opperator one and put it on value 12

[240, 67, 16, 8, 50, 12, 247(

I checked the midichannels and put the "sys info" on "on", so everything seems right...

I just don't get it !

I think the sysex code is broken (for windows?)

have you checked with midiox?

instead of

240
67 16 8
50 12 247

midiox gets ..
240
67 0 0
16 0 0
..

??
also, midiox doesn't understand how many bytes of sysex to expect. (says 0)

it might be supersimple to fix but it doesn't work as described in the manual..

works in Pd-vanilla 0.42-5! switching for now. will e tended get the nicer midi, too, eventually?

edit: puts together sysex message correctly but some stuffs still faulty * aargh

submitted bug to sourceforge:

http://sourceforge.net/tracker/?func=detail&aid=3010591&group_id=55736&atid=478070

Hey I am also working with a dx21, if you wish to collaborate