Every mix, beat‑matched.
Tap along to the track that's playing, add the next one's BPM, and see exactly where deck B's tempo fader goes.
Tested on Pioneer CDJ MK · ±10% range · works on any deck
Tap tempo
Waiting for the kick0 beats · bar – : – · 0.0 s
- Beats
- 0
- Bar : beat
- – : –
- Seconds
- 0.0
Match the next track
Tap, or type it
Its original BPM
Common tempos for B
Deck B tempo fader
Tap or type ABoth tempos in, the answer shows here.
Built for the booth. Three keys, no menus. Try them now.
How it works. A few seconds, while the record plays.
- 01
Tap along
Tap the pad, or press Space, on every kick of the track that is playing. Four taps lock the tempo; more taps make it steadier.
- 02
Add the next track
Type the new track's original BPM, the one printed on the deck with its fader at 0, or pick a common tempo.
- 03
Read the fader
The signed percentage is where deck B's tempo fader goes. Plus speeds it up, minus slows it down.
Questions from the booth. The short answers.
Every tap is a point in time. The calculator fits a straight line through all of them (least squares), so one early or late tap barely moves the answer. The more you tap, the steadier it gets.
A plus result means deck B has to play faster, a minus result slower. On Pioneer CDJs the plus end of the tempo fader is the one nearest you.
Perfect is a move of 8% or less, Good is up to 16%, and anything bigger is Difficult. Big moves change the feel of a track, so a cut or an echo out often works better.
Yes. It was tested on Pioneer CDJ MK series decks with the ±10% tempo range, but the percentage is the same on any deck or software. Just check your tempo range is wide enough.