Has the idea ever come up to have two finger numbers on one note? It may prove useful in the following cases.
- When you're playing quickly from a black key to a white one, common in blues, not necessarily a grace note, but can apply to them as well. Of course you can slide with one finger, and achieve the same results. By the way, does Synthesia support grace notes?
- When you start playing a note with one finger, then substituting with another finger, to make the first finger free for playing what follows.
- If two fingering options are equally good, depending on hand size, for example.