@exiannyc I'd like this feature too.
The motivation is different in my case. I'd like to do sound design with the Anyma Phi as a standalone device, no keyboard (in whatever location I want, sofa, park), then when I'm done, connect a keyboard.
You can kind of hack round this using the piezo with envelope follower rise and fall as ADSR type controls, but that's not really the same thing.