Tempo & BPM API
Musical timing maths as an API — turn a tempo into exact times. The durations endpoint gives the length of every note value (whole down to sixty-fourth, plus dotted and triplet variants) at a given BPM, in milliseconds, in hertz, and in samples at your sample rate. The delay endpoint is the producer's note-to-millisecond tool: the delay and reverb times for 1/1 to 1/32 (straight, dotted and triplet) so time-based effects lock to the tempo. The bar endpoint gives the duration of a bar for any time signature. The convert endpoint turns BPM into milliseconds per beat (and back) and names the Italian tempo marking — Largo, Adagio, Andante, Moderato, Allegro, Presto and the rest. Everything is computed locally and deterministically, so it is instant and private. Ideal for DAWs and music-production tools, drum machines and sequencers, delay and echo plug-ins, metronomes, and audio apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. This is tempo and rhythm timing; for notes, intervals, chords and scales use a music-theory API.
api.oanor.com/tempo-api
