Dear ladies and gentlemen,
do you know a program for Windows-pc, that is capable to convert monophonic audio into MIDI-events (note on/off) in real-time, with little latency?
I could imagine a system, consisting of an USB-audio-interface (with a MIDI interface), that sends audio to a pc, where this audio is converted into MIDI events by a program, and these events are sent back to the USB-interface, where they can control for example a synthesizer over the MIDI-out.
Maybe you already offer such an app, or you know somebody, who does.