I've never explored MPE, but I'm sure the Linnstrument can do sustain from either its keyboard or an external pedal. So sustain, one of the most widely used and fundamental controllers, must be in the MPE spec somewhere.

The ROLI keyboard can be connected to an external sustain pedal. So I would assume it understands the standard controller message CC#64.

Notice also that the MPE specs differentiate between global and per-note control where sustain is considered as global (usually handled on channel 1). https://docs.google.com/document/d/1-26r0pVtVBrZHM6VGA05hpF-ij5xT6aaXY9BfDzyTx8/edit#

Hey Broc--I appreciate the feedback. I have no trouble getting that CC#64, my trouble is finding a way to implement it in Max. MPE is a little trickier than MIDI. There's no [mpesustain] object, and Cycling 74's solution processing mpe note data--[mpestartremap] and [mpeendremap]--doesn't allow for sustain functionality.

It occurred to me that I might be able to use the [mpeparse] object like the mentioned [mpe____remap] objects, to parse and then re-interpolate mpe data. It's a workaround, but might be feasible...

I'd love to hear from a dev on whether adding sustain functionality to the [mpestartremap] and [mpeendremap] objects, or simply an [mpesustain] object, is in the works.

Does anyone have any updates on this?