Like say a kalimba? I’d like to be able to take either sheet music or simply play a keyboard on the screen as input and it could record what i input or produce the output from sheet music
Music Scanner is the only I’m aware of and it does basically everything (except the on screen keyboard part) but doesnt have more eclectic instruments for playback which I need more flexibillity with :(
Musescore might be able to do what you need? I believe it has on-screen keyboard as an option for note input, and the last reply in this thread has info for importing PDFs of sheet music.