This is probably in existence somewhere, but how about a multi-channel (track?) box that you can sample into, then based on pitch or frequency of note, assign different tones to that note? Or if it’s possible, somehow have the box be able to identify each individual string on the guitar and assign that way (but without needing a midi pickup)? Might as well ask for a coffee maker on that sucker as well, for all the fantasy I’m indulging in!