- Octatrack sends midi note off commands as velocity zero - this is a long accepted and legitimate way to deal with note off, as documented in the official Midi Association specifications - however, not all devices are compliant with this, resulting in unreliable note handling on the recipient device.
In this case the user should contact the manufacturer of the product in question and request that it be fixed in a firmware update, since this way of handling note off is fairly common and as mentioned before part of the midi standard specification.
Lifted from a comment by @darenager in this thread Octatrack MIDI note quirks, help needed!
Note off, and velocity zero, are not the same thing. Hense confusion over what you record into an elektron sequencer, and what it plays back.
Good luck with getting Elektron to change the way the octatrack does anything.
If they ever update the firmwares to do it properly, and If they ever stop using that infernal coating on their buttons, I’d be all over it.