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Audio trimmer
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BPM & key finder.
Tap a tempo, drop in a track for BPM and Camelot key, then convert that BPM straight into delay and reverb note-division times.
01 / Tap tempo
Feel it out.
Tap along to the beat. We'll average your last few taps into a steady BPM.
— BPM
02 / Drag & drop analysis
Let the track tell you.
Decoding and analysis both happen right in your browser. Your track is never uploaded anywhere.
Drop an audio file here
or click to choose one · MP3, WAV, FLAC, OGG
—BPM
—
—
03 / BPM to delay time
Sync your effects.
Match your delay, echo or LFO rate to the track when your plugin only shows note divisions, not milliseconds (or vice versa).
| Note | Straight | Dotted | Triplet |
|---|
Good to know
How this works.
Is my music uploaded anywhere?
No. Your browser decodes the file and runs the whole analysis locally. Nothing about your track ever leaves your device.
How accurate is the BPM and key detection?
It is a solid estimate, good enough for set prep, not a lab-grade analyzer. Very quiet intros or heavily filtered tracks can throw it off; a clip with clear drums and harmony works best.
What is a Camelot code?
A shorthand for musical key (like "8A") used for harmonic mixing: tracks that share a number, or are one number apart, generally mix well together.
Why milliseconds for delay times?
Most delay, echo and reverb plugins let you dial in an exact time in milliseconds even when their preset list only offers note divisions like 1/4 or 1/8.