Online Tempo & Key Detector
The analyzer listens to the rhythm and the harmony of a track and estimates two things DJs and producers need all the time: the tempo and the key.
What Does the BPM & Key Analyzer Show?
- Tempo: the beats per minute, with the half-time and double-time values next to it, because a track at 140 BPM can also be counted at 70.
- Key: the most likely key, such as A minor, with its Camelot code (8A) for harmonic mixing, and the second most likely key.
- Confidence: a high, medium or low rating for each result, so you know when to double-check.
- Click on the beat: switch on the click and play the track. If the clicks stay on the beat from start to finish, the tempo is right.
How Reliable Are the Results?
Tempo and key are estimated from the audio, and estimates can be wrong. Tempo detection works best on music with a steady beat: dance, pop, hip-hop and anything recorded to a click. The most common error is a factor of two, which is why the half and double values are shown. Music with a free or changing tempo has no single BPM to find. Key detection is harder: the most frequent mistake is to confuse a key with its relative major or minor, for example C major with A minor. The two share the same notes and the same Camelot number, so for harmonic mixing the result is still usable. Trust your ears over the display, and check important tracks with the click or with the BPM Tapper.
Who Is It For?
DJs sorting tracks by tempo and key before a set, producers matching a sample to a project, dancers and fitness instructors choosing music at a certain pace, and musicians who want to know the key of a song before they play along. Compatible keys are shown on the Camelot Wheel; to change the tempo or the key of a track, use the Pitch & Speed Changer.