Find a song's BPM. Write it into the file.
Drop your files on the record: BPM and key are detected and written to the tags. No file? Tap along with the beat below.
Your files stay on your computer. Nothing is uploaded.
WAV · AIFF
Tracks
| Track | Key | Classic | BPM | Status |
|---|
In Rekordbox, select the tracks, right-click and choose Reload Tag. To see 1A–12B in the key column, set Preferences → View → Key display format → Alphanumeric.
Tap tempo
Tap the button along with the beat (or press space while it's focused). 8–10 taps are enough; pause for 2 seconds to start over.
BPM to milliseconds
Sync delay and reverb times to the tempo: enter the BPM and get the length of each note value. T = triplet, D = dotted.
| Note | Length (ms) |
|---|---|
| 1/1 | 1,875 |
| 1/2 | 937.5 |
| 1/4 | 468.8 |
| 1/8 | 234.4 |
| 1/16 | 117.2 |
| 1/8 T | 156.3 |
| 1/8 D | 351.6 |
FAQ
How do I find the BPM of a song?
Drop the file above: the tempo is measured from the spacing of hits in the bass and percussion range, and the result is written to the file's BPM tag. No file? Tap the tap tempo button along with the beat.
Why is the BPM half or double?
Tempo detectors sometimes split or merge beats (174 instead of 87, for example). Count the beat of the track; the right value is usually one of the two.
How much does the BPM change with pitch?
By the pitch percentage: a 128 BPM track at +4% plays at 133.1 BPM. With key lock off, the key shifts too; about 6% equals one semitone.