Jam JamFind the chords in an MP3
Drop an audio file and Jam Jam pulls out its time-stamped chords, key, tempo and section structure — without uploading a thing.
You have the track as an mp3, but not its chords. Drop the file into the Audio file tab of Jam Jam detection: a BTC model — an embedded chord transformer — goes through the whole thing and returns time-stamped chords, an estimated key, the tempo and the song structure in sections, with the repeats it spots. 14 chord qualities across all 12 keys, 168 chords in total. Everything is computed in your browser or on your phone: the file never leaves your device. One tap then sends the song to your chord notebook, where you edit it, transpose it and export it as a PDF.
How to get chords from an audio file
Drop your file
Drag in an mp3, m4a, wav or flac — nothing is uploaded, the analysis runs on your own device.
Let the model listen
The BTC model goes through the whole track and pulls out time-stamped chords, the key and the tempo.
Move through the timeline
Tap any chord on the timeline and playback jumps there, so you can check each passage by ear.
Send it to your notebook
One tap and the song lands in your notebook, title pre-filled, ready to transpose and export as a PDF.
Your file never leaves your device
Fully on-device analysis
The mp3 stays with you: the work runs in a Web Worker in your browser, or in the app’s native module. Nothing is uploaded, no server ever hears your music.
A real chord model
A bidirectional BTC transformer, fed by a CQT front-end at 22,050 Hz over 144 bands, recognises 14 qualities across the 12 keys — 168 chords. The same model on web and mobile.
More than a chord grid
You also get the estimated key, the tempo in BPM and the section structure with its detected repeats — enough to understand the track, not just replay it.
The song keeps going
The analysis is not a throwaway result: it becomes a song in your notebook, editable, transposable from −6 to +6 semitones and exportable as a PDF.
Why this analysis
- Time-stamped chords, key, tempo and sections in one pass
- 14 chord qualities on the 12 keys — 168 chords recognised
- Clickable timeline: tap a chord and playback jumps there
- On web, Android and iOS — your file is never uploaded
An online analyser hands you a grid and stops there. Here the track you drop becomes a song in your notebook: you fix a doubtful chord, transpose it for your voice, ask for the most comfortable capo, add the lyrics, export a PDF for rehearsal. The key it reads can also lock the online keyboard, and the diagrams follow the instrument you play. That chain — file, notebook, keyboard, PDF — is the difference, not the recognition alone.
More Jam Jam tools
Real-time chord detection
Play an instrument and Jam Jam names the chord and notes it hears, live, from your microphone.
Your online chord songbook
Import a song, transpose it, pick your fingering — and let the lyrics scroll on their own while you sing.
Find and read chords
Play a chord and Jam Jam names it, lists the notes it hears and draws it on your instrument.
Guides & tips
Short, no-nonsense guides to play, tune and find chords faster — each one backed by a Jam Jam tool you can open right away.
Audio file chords FAQ
Is my file uploaded to a server?
No. The analysis runs entirely on your device — in your browser or in the app — and the file is never uploaded. It is free and needs no sign-up.
Which formats can I drop?
On the web, anything your browser can decode. In the mobile app: mp3, m4a, aac, wav, flac and ogg. You drop the file as it is, with no conversion first.
Does it work on a phone?
Yes: on the web, on Android and on iOS, with the same model. The mobile app can also transcribe the lyrics; keeping a history of analysed files is a premium feature.