I appreciate you confirming that for me!
I also just found out about this:
https://wiki.linuxaudio.org/apps/all/qmidiroute
http://manpages.ubuntu.com/manpages/trusty/man1/qmidiroute.1.html
Looks like it might work for setting the min/max volumes of individual keys?
But apparently no curves.
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Sent from:
http://linux-audio.4202.n7.nabble.com/linux-audio-user-f5.html