MIDI keyboard note-on and note-off inverted
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?
Last edited by jakykong; 08-21-2010 at 04:21 AM.