BPM Finder — original key lesson examples
Checked: 2026-10-31
Source: Original downloadable teaching WAVs analyzed through the normal browser upload and production worker; no mocked or edited results.
Worker: /analysis-worker.mjs?v=commercial-clap-2

Composition: one chord per 2-second 4/4 bar at 120 BPM; four bars repeated twice.
Encoding: mono 16-bit PCM WAV; 22050 Hz; 16 seconds.
Tuning: A4 = 440 Hz, 12-tone equal temperament.
Original BPM Finder teaching examples. You may download and reuse these audio examples.

File: a-minor-lesson.wav
Composed progression: Am - Dm - E - Am (repeated twice)
Intended tonal center: A minor
Observed, unedited analyzer result: A minor; 8A; 120 BPM; 16 seconds.
SHA-256: 973c85859742cf19b13fd201884a3993123fc4c5d89f2bc745fd5923ac013acf

File: c-major-lesson.wav
Composed progression: C - F - G - C (repeated twice)
Intended tonal center: C major
Observed, unedited analyzer result: C major; 8B; 120 BPM; 16 seconds.
SHA-256: 77cfcf626c94336889b8c634e6dc41cc2eb37690be948ffb72e64c3631935006

Reproduce: download the WAV linked in the guide, upload it through BPM Finder, and compare Key and Camelot before editing any result.
These two clear synthesized examples are teaching material, not an accuracy benchmark for real-world songs or percussion. Future engine versions may produce different estimates.