It actually looks like almost all of NoteDataUtil can be done naturally
in fixed-point: instead of passing around floating point, converting it to
fixed point for NoteData indexing, and adding floating-point beat fractions,
just pass around fixed point everywhere, and convert beat fractions to
fixed-point (which probably happens at compile-time)
If TimingData, etc. does the same thing, things will be simpler ...
Glenn Maynard
24f8de5cec