Chord Detector
Know every chord in any song, in seconds.
Upload a track and get its key, BPM, and full chord progression back automatically — real audio analysis, not a database lookup or a guess. Works for guitar, piano, or any instrument: if it's in the recording, the engine hears it. Built for guitarists learning a song by ear, cover bands charting a setlist, and producers who just want to know what key a reference track is in.
How it works
01
Upload your track
Any format — a rough phone recording works fine, doesn't need to be mastered first.
02
We analyze it
Real audio analysis (madmom + essentia) detects key, tempo, and the chord progression, section by section.
03
Play along
Chords sync to playback in real time — scroll through the progression as the track plays.
Not just guitar
Any recording quality
Pricing
Free trial
3 songs
Lifetime, no card required. Try it before you pay anything.
Pay per song
€1.49
After your 3 free — no subscription, just this one track.
All-Access
€19.99/mo
Unlimited chord detection, plus everything else in the studio.
Questions
How accurate is it?
Estimated from the actual audio, not a database lookup — genuinely good on most recordings, but it's a starting point for the key and chords, not a guaranteed-accurate transcription. Complex jazz voicings or heavily distorted mixes are harder than a clean pop or acoustic recording.
Do I need to master the track first?
No — chord detection is a separate tool from mastering. Upload a rough recording, a reference track, or a finished master; it works on any of them independently.
Is this bundled with a mastering plan?
It's its own standalone product — you don't need to master anything or subscribe to use it. All-Access subscribers get it unlimited as part of their plan; everyone else gets 3 free, then pays per song.