Polyrhythm Metronome
Hear and see 2 or 3 simultaneous rhythms as a polyrhythm. Visual timeline with numbered beats, precise audio scheduling, and common ratio presets.
Runs in your browser. No data leaves your device.
Frequently Asked Questions
How does the Polyrhythm Metronome work?
The tool uses a lookahead audio scheduler that runs every 25 milliseconds via setInterval, scheduling Web Audio API oscillator clicks into the future using AudioContext.currentTime. Each rhythm layer divides the bar duration independently (e.g., 3 beats vs 4 beats in the same span), and the visual timeline draws beat markers at their proportional positions along a shared axis.
What is a polyrhythm?
A polyrhythm is two or more rhythms with different beat counts played simultaneously over the same time span. For example, 3-against-2 means one rhythm plays 3 evenly spaced beats while another plays 2 in the same duration.
What polyrhythm ratios can I practice?
Common presets include 2:3, 3:4, 4:3, 5:4, and 7:4. You can also set custom ratios. The visual timeline shows exactly where each beat falls to help you internalize the pattern.
Is this useful for musicians?
Yes. Polyrhythm practice improves rhythmic independence, timing accuracy, and the ability to play complex grooves. It is essential for drummers, percussionists, and pianists working with African, Latin, or progressive music.