🎵 Metronome

The click is synthesised on demand — a short sine blip, 1200 Hz on the downbeat and 800 Hz inside the bar, the way a mechanical metronome goes ping-po-po. Scheduling uses a look-ahead loop rather than one timer per beat, so browser timer jitter never accumulates into a drifting pulse. Every tempo number below comes from the standard Maelzel/metronome mapping the sheet-music words promise.

Why "Andante" needs a metronome mark anyway

Tempo words are not fixed speeds: Beethoven\u2019s own table bolted Maelzel\u2019s new metronome numbers onto the words in 1817, and scholars still fight about the edges — Andante meant walking pace, but people walk at 76 and at 108. The ranges printed above are the conventional modern reading, and they are guidelines: the metronome exists to keep your chosen tempo, which is the only number that survives a rehearsal. The accent pattern matters as much as the speed — a click track without a downbeat makes practice slower than playing, because you cannot count bars, only beats.

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