Rhythm game
Guess the BPM
Estimate ten tempos. Easy mode uses familiar 5-BPM steps; Expert uses any integer tempo from 50–200. Audible timing is scheduled on the Web Audio clock.
1/10round
0within 5 BPM
0points
80–140range
How StaveWave keeps this accurate
Pitch, notation, intervals, harmony, and tempo derive from one deterministic music-core module. The test suite checks known answers plus exhaustive invariants so contradictory musical information fails validation instead of reaching the player.