Know your track.
Before you open it.
Drop any audio file and get its key, tempo and loudness instantly — measured properly, entirely on your Mac. Nothing uploads. Nothing to install alongside it.
Closed beta · macOS 13+ · Apple silicon & Intel
See it work.
No narration, no edit. Just the window, doing the thing.
Small app…serious measurement.
Six things it does properly — each one shown in the window that does it. Built on Accelerate and AVFoundation, the frameworks already on your Mac.
Tempo that survives a breakdown
Onsets are read across 40 log-spaced bands, so hats and snares define the grid — not just the kick. Metrical levels are scored explicitly. That's what stops 103 being reported as 137.
It knows your pack is detuned
Tuning is measured, not assumed. A loop sitting 40 cents off A=440 still resolves to the right key instead of smearing into its neighbour.
It says when it isn't sure
High, Medium or Unsure — with the runner-up named. “A minor, possibly C major” is a more useful sentence than a confident guess, and a much cheaper one to act on.
The wheel is built in
Every result carries its Camelot position and the keys that mix cleanly with it. No second app, no chart taped to the monitor — the next track picks itself.
True peak and LUFS, done properly
4× oversampled true peak and integrated loudness to ITU-R BS.1770-4 — the number streaming platforms normalise against. Real units, not an invented “energy” score.
Offline by construction
There is no network code to disable, because there is none. No telemetry, no licence ping, no local web server, and no firewall prompt on first launch.
Stop guessing
what's in the folder.
DropWave is in closed beta. The Discord is where the builds, the bug reports and the false readings live.