The point
Two decks, two different tempos. Get them running in time using only your ears and the pitch fader — the way you would on two turntables. There is no sync button, no BPM readout and no waveform on purpose, because none of those exist on vinyl.
Modes
- Pro — nothing on screen. No BPM, no waveforms. Ears only, exactly like vinyl.
- Regular — waveforms on, numbers off. You can see the groove but nothing tells you the answer.
- Easy — both on. Useful for learning what a match looks like before you go blind.
The two switches next to the modes flip BPM and waveforms independently if you want your own combination.
Controls
- Pitch fader — changes speed and pitch together, exactly like a turntable. ±8% range.
- Nudge by keyboard — A/D for the left deck, ←/→ for the right. Tap for a tiny shove, hold for a bigger one: left drags the record back, right pushes it on. Add Shift to lean on it harder. This lines the downbeats up without touching the mouse.
- Trim the pitch — W/S for the left deck, ↑/↓ for the right, in 0.05% steps (Shift for 0.5%). They move the fader, so up is slower and down is faster, same as the marks on a Technics. Nudging fixes where the beat sits; trimming fixes how fast it runs, so use both.
- Drag the platter — same thing by hand, and spin it hard to scratch or backspin.
- Cue — a separate headphone bus. A cued deck plays at full level no matter where the crossfader sits, so you can beatmatch a record before bringing it in.
- Split — a browser only has one output, so on speakers the cue just adds to what you hear. Split sends the cue to your left ear and the mix to your right, which is what a splitter cable does on a mixer without a second output. Put headphones on, cue one deck, and you can work on it in the left ear while the right ear stays on the mix.
- Your own records — "Link a folder" under the crate points the app at a folder on your disk and its tracks join the crate. Nothing is uploaded: the folder is remembered only in this browser, on this machine, and nobody else visiting the site can see or reach it. If the browser has dropped its permission since last time, the button offers to reconnect. In Safari, which lacks the folder API, this falls back to picking files each visit. You can also drop a single file straight onto a platter.
Checking yourself
Reveal drift only after you have matched by ear — it tells you how far apart the decks are running, so you can tell a genuine match from one that slowly slides.