Drag & drop audio file here, or
1. Create a song with + New Song and drop in an audio file.
2. Press P to play, then Space each time you hear a chord change.
3. Turn on Assign in the palette header, play again, and click chords to label each onset.
4. Switch to Chord Chart to pair chords with lyrics and export.
Everything auto-saves. Set the Key to see diatonic chords. Hotkeys 1-7 and QWERTYU work even without a key (defaults to C major).
Assign toggle — when on, clicking or using hotkeys assigns chords to onsets. When off, they only preview (blue flash). Shift always assigns regardless.
Play along toggle — automatically plays chord sounds at each onset during playback.
Vol dropdown — separate volume sliders for the song and chord sounds.
Click any chord to hear it and see the voicing on the piano. Right-click for enharmonic variants.
Space tap onset
P play/pause
S cycle speed
←→ seek 5s
[ ] prev/next onset
Z undo
A redo
D delete onset
Shift+←→ nudge onset ±50ms
Scroll zoom waveform
Ctrl+drag select region
1-7 major triads (I–vii°)
Q W E R T Y U relative minor triads
Purple = left hand (bass), orange = right hand (voicing). Drag the dotted range bars to change octaves. Hover a palette chord to preview its notes in grey.
Paste lyrics with [Section] headers. Use Auto-Link or Auto-Match to place chords on words, then fine-tune:
Select a chord from the palette, then click any word to place it (cursor changes to +)
Hold Shift while hovering a word to split it into 3 zones — place up to 3 chords per word
Click word with chord — select it Click another word — move chord there
Right-click any word — add/change/remove chord
Click any word — seek playback to that word
←→ nudge chord
Shift+←→ shift all from here
Del remove
Esc deselect
Click a section label to rename it. Click a time to seek. Click the waveform to jump anywhere. Right-click a chord in the list for variants. Use Export to save as JSON or copy to clipboard.
Column headers show each chord's role in the key — the same patterns work in every key. Uppercase = major, lowercase = minor.
I home base ii gentle tension iii subtle color IV lift/hope V pull back to I vi emotional/minor vii° rare, strong tension
Common progressions: I–V–vi–IV (pop), I–IV–V (rock/folk), ii–V–I (jazz).
Drag & drop audio file here, or