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Old 08-21-2010, 04:21 AM   #1
jakykong
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Registered: Apr 2006
Location: Washington
Distribution: Debian Gnu/Linux Lenny on AMD64x2 (32-bit mode), an AMD Sempron 64 laptop, debian, 32bit
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MIDI keyboard note-on and note-off inverted


Hello,

I recently acquired a Casio midi keyboard and a cheap USB-midi interface. After some tinkering, I seem to have gotten it to basically work. (Using Jackd to connect up the midi outputs to a synthesizer, like bristol, I can get notes to play just fine.)

The only problem is that the note-on and note-off events seem to be reversed. What I mean is that, I get a note when I release a key on the keyboard, rather than when I press it. Which also means I can't stop a note without ending the program.

I've done some Googling, and I think I can solve the problem by writing a filter to invert the note-on and note-off events. Before I end up reinventing the wheel, though, I thought I would ask: does anybody know of existing software to do this, or some other solution to this odd problem?

Thanks.

Last edited by jakykong; 08-21-2010 at 04:21 AM. Reason: typo
 
  


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