DJ mixing

DJ Key & BPM Matcher

Plan smoother transitions. Enter the tempo and key of the playing track and the next one to see how far to move the pitch fader and whether the keys will clash.

Track A (playing)

Track B (next)

-
0%Pitch B to match A
0%Pitch A to match B
0Meet-in-the-middle BPM
0Key shift of B without key lock

    Keys that mix well with Track A

    Runs entirely in your browser. Nothing is uploaded to any server.

    Why plan mixes with key and BPM

    Cleaner blends

    Compatible keys let two tracks play together without sour, clashing notes.

    Know your fader

    See instantly whether a mix is possible within your pitch range or needs half time.

    Avoid key surprises

    Pitching without key lock changes the key; know where it will land before you mix.

    How to match two tracks

    1. Enter both tracksAdd the BPM and key of the playing track and the next track.
    2. Read the verdictSee how compatible the keys are and how far to move the pitch fader.
    3. Pick a better keyUse the list of compatible keys to choose the next track for a smoother transition.

    How harmonic mixing works

    The Camelot wheel arranges the 24 keys like a clock. Numbers 1 to 12 go around the wheel, with A for minor and B for major. Keys with the same number, or one step apart with the same letter, share most of their notes, so tracks in those keys blend smoothly.

    To match tempo, the next track is sped up or slowed down by the ratio of the two BPMs. Changing speed on a turntable or a controller without key lock also changes pitch by 12 times log2 of that ratio in semitones, roughly one semitone for every 6 percent, which can push a compatible track into a clashing key.

    Same number

    8A to 8B is a relative major or minor switch.

    Plus or minus one

    8A to 9A or 7A moves by a perfect fifth.

    About 6% = 1 semitone

    Big pitch moves without key lock change the key.

    DJ key and BPM matcher FAQ

    What is the Camelot wheel?

    A DJ-friendly chart of the 24 musical keys. Each key gets a number from 1 to 12 and a letter, A for minor and B for major, so compatible keys are easy to spot.

    How is the pitch percentage calculated?

    It is the target BPM divided by the track's BPM, minus one, times 100. Matching a 128 BPM track to 124 BPM needs -3.13 percent.

    What is half or double time?

    A 70 BPM track can be mixed with a 140 BPM track because their beats line up every other beat. The tool checks both options automatically.

    Does key lock solve key clashes?

    Key lock keeps the original key when you change tempo. It does not make clashing keys compatible; it only stops pitching from moving the key.

    Where do I find a track's key?

    DJ software such as Rekordbox, Serato or Traktor can analyze keys, and many stores list them.

    Try other music tools

    More free tools from My Panda Toolbox.

    TAPTap Tempo BPM FinderTap to find BPM. KEYSong Key FinderFind a song's key. BPMAudio Tempo DetectorDetect BPM from audio. BPMBPM CalculatorDelay and tempo math.