MIDI keyboard issues

[Flaneurette]

Hello,

I have been having issues with a M-Audio Keystation keyboard.

Here's the MIDI-OX output for each keyboard:

Keystation
Note on: 91
Note off: 91

Alesis
Note on: 90
Note off: 80


How is this even possible? why is my Keystation sending 0x91 on a note-off? why doesn't it just send 0x91/0x81? this results in perpetually sustained notes in some software that only check for note on/off on the second MIDI channel, i.e. 0x91/0x81.

I tried a hard reset, but to no avail... I am really puzzled.

[DarkStar]

A Note On with a velocity of 0 is treated as a Note Off, as per the MIDI standard(s). That is probably what the Keystation is sending. Have a look at them in ReaControlMIDI's Log

And, it looks like the channels are different between the 2 keyboards: channel 2 on Keystation, channel 1 on Alesis. You can map the incoming MIDI to a specific channel in Reaper's Input MIDI sub-menu.

[Flaneurette]

I found that the MIDI spec actually allows a 90, 91 etc (incremented by the number of MIDI controllers) as a note-off, if, the velocity is zero. Well, that's just lazy.

The velocity of the Keystation is indeed zero on a note-off. But that doesn't solve my problem with certain programs that only look for note-off messages, like 80, 81 etc.

Is there a way/hack to re-mediate this? maybe some piece of software that changes a 0x91 with a velocity of 0x00 to 0x81, 0x00?

EDIT: posted the same time as DarkStar, didn't read it before posting.