I've uploaded a new "developer" tarball to
http://mellowood.ca/mma/downloads.html#developerfor you testing and enjoyment. New stuff includes:
Grace note option in solo notes,
MidiWheel command for controlling the “pitch bend” controller,
ChannelInit command for setting up MIDI stuff at startup,
MidiVolume, etc. fixed for tracks and global,
A reworking of the path library so you can insert libs before stdlib.
Have fun!