Anyone know if there's a program like muddyGB or this fork, but for other consoles with more buttons? More specifically, I'm looking for something like a cross between Free PIano and muddyGB for the PS Vita or something similar, something where I can assign buttons and button combos to specific notes/chords on the keyboard and use the touch screen or extra buttons/inputs for various commands. To be clear, I'm not looking for a tracker but something that can play different notes in real time by pressing different buttons/button combos.

That's probably a tall order, so I'll take what I can get as far as muddyGB equivalents on consoles that have controllers with more buttons. Anyone know of anything?