or drag a .ladder.json / MIDI / MusicXML / Ableton .als / audio file anywhere
Paste a chord progression — Ultimate-Guitar text, [ch]Am[/ch] tags, or just C G Am F. It sets the key/mode and restricts chord detection to your chords. Apply it before you listen or upload for best results.
…or build it on the light show. On the WHEEL, spin the inner keyboard ring to set the tonic and the outer colour rings to set the mode — each disc spins independently, like a real key wheel; tap a chord cell to mark it expected. (Linear/piano view: click + the mode dropdown.)
🎯 Wheel + piano always live — drag inner ring = tonic · colour rings = mode · tap a chord cell to add/remove it from the expected chords
Play your instruments live — guitar + vocal mic on your audio interface and a MIDI keyboard each become a channel, and the wheel shows the combined chord · key · bass · melody. Works for one instrument or a whole band; assign each input a part below, then ▶ Start.
lock the key with the Lock + Drone button in the centre of the wheel
—
melody—
chord—
key—
key = your Lock + Drone tonic·
loop 0 bars · tempo/metre below retcon this loop · click a chord to fix it / split a measure (e.g. C G) · drag a chord edge to resize·
Tonal wheel + one unified timeline: BARS · MIDI (editable) ·
SHEET · WAVE are the same data on one time grid with a fixed left gutter, so
notes stay in the same columns. Edit in MIDI — colors recompute and propagate
everywhere; Export saves the edited hub.