Listen before tapping
Each pattern contains five generated notes at a 100 BPM reference tempo, with gaps chosen from half, one and one-and-a-half beats. Playback finishes before the tap button becomes available. Start your reproduction when ready and keep the original gap pattern.
The first tap defines time zero for your response. Four successive inter-tap gaps are compared with four expected gaps. You can use a pointer or focus the button and press Space or Enter; held-key repeats are excluded.
Read gap errors and tolerance
The record includes expected relative times, your relative times, onset errors and inter-tap errors. The summary reports mean absolute gap error and how many gaps are within 100 milliseconds of their targets. This tolerance is a game rule, not a professional assessment threshold.
A constant delay before the first tap cancels because both sequences start at their own first event. A tempo drift or one late middle tap changes later differences and remains visible.
Compare like with like
A keyboard, touch screen and mouse can have different input behavior. Audio output and browser scheduling also have variability. The game does not claim to calibrate those systems or distinguish device jitter from a person’s timing.
Use the same setup and challenge when comparing practice records. Look at repeated attempts rather than treating one timing number as a judgment of musicianship. The tool provides a repeatable local exercise and a transparent record.