This is a polyrhythmic metronome.

The live demo is at http://chchch.github.io/Metronome

Click and drag individual metronomes to organize them! The one at the top is
the master and determines the BPM!

Click the plus sign to add a new metronome!

Learn to play a Conlon Nancarrow étude!

2025 update: Ummm it doesn't work so great now