pub const FALL_MAX: usize = 8;Expand description
A pump falls into its dip within this many bins.
The fall counts from the last bin before the dip that lies within
PUMP_BACK of the reference, on the median of the two-beat curves,
so a dip early in the beat falls from the end of the beat before. A
sidechain ducks within milliseconds;
a note decaying across the beat falls over most of it and comes back
at the next beat at once.