The analysis listens
Chords are read from the audio itself rather than from a catalogue of known songs, so an unreleased demo works the same as a hit.
Chord recognition
JamAI, Jambox’s own chord engine, listens to the song and writes the progression down — then keeps it under the playhead, so the chord you see is the chord you are hearing.
Download freeHow it works
The chart appears
Chord names sit on a track above the stems, each landing on the beat it is played, with a grid and a sheet beneath.
Correct what you know better
Double-click any chord to change its root, its quality or its extension; the label follows the key you are practising in.
What you get
- A chord track in sync with the recording
- The same progression as a grid or as a lead sheet
- Degree names (I, vi, IV) if you read harmony that way
Where it stops
Recognition is strong on clear harmony and less certain on dense mixes, passing chords and heavily distorted guitars. Every chord can be edited, and an edited chord is what the export carries.
Questions
Does it need an internet connection?
No. The chord model runs on your computer with the rest of the analysis.
Can it find the chords of a song it has never seen?
Yes — nothing about the result depends on the song being in a catalogue. The audio is all it hears.
What if a chord is wrong?
Double-click it and pick another. The correction reaches the chart, the sheet and the PDF.
Related
Key detection
The analysis works out which key the song is in and prints it — “detected: A minor”, the line the app shows under its transpose slider. That reading is the zero point: the song opens in its own key, and every semitone you shift is counted from there.
Key-change detection
When a song moves to a new key, the analysis finds the bar where the tonality changes and raises a gold flag on the chord track, with the new key written on it. The place your chart stopped making sense is the place you can see.
Lyrics when you want them
The lyric track runs under the chords and follows the same playhead, and any line you disagree with is yours to fix by hand.