BPM Analysis
Finding the tempo — automatically and manually.
BPM is the first number rekordbox prints, and the most often wrong on tracks that don't behave.
// WHAT IT DOES
BPM (Beats Per Minute) is how many beats happen in one minute. House at 124 BPM = 124 kick drums per minute. Tempo is the heartbeat of every dance track.
When you drop a track into rekordbox, it scans the waveform looking for repeating low-frequency hits (kicks) and times them. The result becomes the track's BPM and a 'beatgrid' — a visual overlay showing where every beat is supposed to land.
Most of the time the auto-analysis is right. But it can be wrong on tracks with: unusual time signatures, half-time/double-time feel, slow intros that confuse the algorithm, or live recordings where the tempo drifts.
- • Sync, key lock, beat jumps, loops and quantised effects all read the beatgrid. Wrong grid = wrong sync = audible chaos.
- • Knowing where the grid lies lets you trust hot cues and beat-quantised loops without testing every drop live.
- • Spotting a wrong grid in 5 seconds (zoom in, look at a at 2:00) saves you a public mistake.
// SEE & HEAR IT
▸ HOW IT WORKS
- • 'Gallop' (uneven kick spacing) when you sync to a track — almost always grid , not pitch.
- • Beats arriving before or after the visual grid line — the eye is faster than the ear here.
- • Hot cues landing slightly off the downbeat after auto-analysis — symptom of a misplaced anchor.
▸ WALKTHROUGH (5 steps)
- 1. DO: Import a drum & bass track to rekordbox. Note the detected BPM.▸ LISTEN: If it shows ~85-90 BPM, the analyser locked half-time. Click ×2 in the Edit Beatgrid panel — now it reads ~170-180.
- 2. DO: Open any track and zoom the waveform to 1-bar view in rekordbox.▸ LISTEN: You see the beatgrid as vertical lines. Check that each line lands on a kick — that's a healthy grid.
- 3. DO: Jump to 3:30 in a 5-minute track and zoom in.▸ LISTEN: If the grid lines now sit slightly *before* or *after* the kicks, your grid has drifted — set Dynamic mode and add an anchor at the new tempo zone.
- 4. DO: Use the 'Adjust' arrows to nudge the entire grid left or right by sub-beats.▸ LISTEN: When the grid sits right on the kicks throughout, you're done. Set hot cues only after grid is locked.
- 5. DO: Find a track with a free-form intro (no kick for 30+ seconds). Set the anchor at the first solid downbeat of the drop, not the silent intro.▸ LISTEN: Grid extends correctly forwards and backwards from the anchor.
▸ COMMON MISTAKES
- ✗ Trusting the auto-grid for sync without zoom-checking at the track's end.
- ✗ Fixing a drifted grid by adding more anchors when the real fix is switching to Dynamic mode.
- ✗ Setting hot cues before the grid is correct — you'll re-do every cue when you fix the grid later.
- ✗ Leaving DnB tracks at half-detected BPM and then 'syncing' them — your software will think they're a different tempo than they sound.