Note up triggers twice

[tomkail]

Tested on OSX with a drum kit and keyboard.
On hitting a drum I expect to see a note on and an note off. What I see is two note ons and an a note off.
The second note on has data2 of 0. Should the system avoid registering note on if note off is detected?

[keijiro]

Thanks for the report. Hmm, I have never seen a device that sends a note-on message with data2=0. Which device (drum kit) are you using?

[tomkail]

Axus AXK2 (It's a cheap one). However, it happens on my Casio keyboard too. Just tested again on a fresh version of the package, here's the result of a note up/down via keyboard:

Note pressed
NoteOn: Ch1,48,0.6220472

Note released
NoteOn: Ch1,48,0
NoteOff: Ch1,48

[tomascinga]

Happens to me too on M-Audio O2.