Low/Mid/High ranges for BeatDetektor

[2xAA]

BeatDetektor works best when limited to a BPM range.
Currently we have it set to detect between 85 and 169 BPM, which doesn't allow detection of faster music.
https://github.com/vcync/modV/blob/next/src/application/setup-beat-detektor.js#LL4C41-L4C48

A solution to this would be to spawn three instances of Beat Detektor, low BPM, medium BPM and high BPM, then have an instance selectable through the BPM configuration.

The BeatDetektor instance does nothing when it isn't called, so CPU won't be affected, only a small amount of memory.