Tool · Timing practice
Practice Metronome
A drift-free click track to rebuild your timing. Powered by Web Audio API — never drifts.
120BPM
How to use this metronome for practice
Find the BPM of the minigame you want to improve (check theMinigame Database for timing notes). Set the metronome to that BPM and beats-per-bar, then:
- Listen for two full bars before moving.
- Tap along silently with a finger — not the controller — until the beat feels automatic.
- Now open the minigame. The tempo is already in your body.
The downbeat accent (first beat of each bar) helps you find the phrase structure of minigames that group beats in cycles — particularly useful for Beatspell stages where the rhythmic pattern repeats every 2 or 4 bars.
Why drift-free matters
Most web metronomes use setInterval, which is throttled by the browser and drifts by tens of milliseconds over time. This metronome uses the Web Audio API's hardware clock: each beat is scheduled 120 ms ahead, so the browser's event loop backpressure cannot delay a click. After 10 minutes, the drift is still zero.
Metronome FAQ
Why use a metronome for Rhythm Heaven practice?
Rhythm Heaven grades inputs against precise windows. If your internal beat drifts, your inputs drift with it. Drilling a minigame's BPM with a metronome internalises the tempo before you ever open the game.
Why is this metronome more accurate than a simple setInterval timer?
This metronome schedules beats using the Web Audio API's AudioContext.currentTime — a high-resolution, sample-accurate clock that runs independently of the browser's JavaScript event loop. A 25 ms lookahead window schedules each beat in advance, so even a busy browser tab cannot cause a beat to arrive late.
Will my settings be saved if I close the tab?
Yes. BPM, beats per bar, volume, and downbeat accent are saved to your browser's localStorage under the key rhg.metronome.v1. They persist until you clear your browser data.
What BPM range does this cover?
The metronome supports 40–240 BPM, which covers every minigame in Rhythm Heaven Groove.