Pinpoint BPM and Camelot codes for every track in your crate. Plan harmonic transitions, prep wedding sets in minutes and tag your library straight into Rekordbox, Serato or Engine DJ.
Whether you're closing a Saturday-night residency, programming a 6-hour wedding, or stitching a festival warm-up set, SignalKey gives you the analytical layer pro DJs already pay for — for free. ±0.5 BPM accuracy, 88% first-pass key detection and Camelot codes ready for harmonic mixing in any rig.
Every tool below is free, no signup, no watermark. Click any card to open it.
Lock the exact tempo in 5 seconds. Half / double-time alternates surfaced for genre crossovers like 174 BPM DnB into 87 BPM trap.
Major / minor + Camelot code in one analyse. Drop a folder to tag your whole crate at once and export to Rekordbox / Serato / Engine DJ.
Visual harmonic mixing. Click any slot to see compatible neighbours (one-step clockwise = energy lift, partner = relative key).
Capture a tempo by ear when you're crate-digging in a record shop and the tag's missing.
Pre-bend a track ±15% before you load it into the mixer — useful when blending across tempo brackets.
Move a track ±6 semitones without touching tempo, so you can drop a vocal acapella in any key under your active record.
How a touring DJ uses SignalKey in a typical week.
Dump this week's promos and downloads into BPM Finder + Key Finder. Export the CSV, batch-import into Rekordbox or Serato. Library is tagged in under 10 minutes.
Open the Camelot Wheel. Mark your anchor key, then walk one slot clockwise every 4-6 tracks to lift energy without clashing. Save the journey as a playlist.
For risky blends, run both tracks through the analyser. The Half / Double-time card warns when a 174 BPM jungle record will work with the 87 BPM trap on deck B.
Mid-set you spot a track you want to capture by ear. Tap Tempo on your phone gives you the BPM in seconds, you log it for tomorrow's prep.
“I tagged 380 promos in a Sunday afternoon. The Camelot mapping is dead-on — I haven't had a key clash in a wedding set since I switched.”
— Wedding & residency DJ workflowYes — drop a folder of audio files onto BPM Finder or Key Finder. We process them sequentially and return a CSV with BPM, key and Camelot ready to import into Rekordbox, Serato or Engine DJ.
Drop a track and see the full analysis pass — BPM, key, Camelot, stems, MIDI, LUFS — in one go.