dynamic tempo in ft

This is assuming a native tempo
(150 bpm).

nes audio is rendered at 60hz, so
one tick is 1/60 second. Speed 1
(F01) means 1 tick per line, F02
is 1/30 second, F03 1/15 and so on.

Here's a list of the durations of
the first couple notes (selecting
each note by itself in audacity):

60*0.660 = 39.60 = F28 = F1F + F09
60*0.466 = 27.96 = F1C
60*0.402 = 24.12 = F18
60*0.378 = 22.68 = F17
60*0.371 = 22.26 = F16
60*0.376 = 22.56 = F17
60*0.438 = 26.28 = F1A
60*0.704 = 42.24 = F2A = F1F + F0B

Speed only goes to 31 (0x1F) so
any longer notes will have to be
split across multiple lines.