Key & Mode
Circle of fifths — pick a key and mode; everything else follows.
Progression generator
Build progressions from presets or random functional harmony.
Genre progressions
Signature changes by style — voiced in the current key.
Progression ID
Type a chord progression — analyzed as roman numerals in the current key.
Diatonic chords
The seven chords in the current key — click one to inspect it.
Chord Diagram
Fingering chart for the selected chord on your instrument.
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CAGED C major
The five open-chord shapes of one major triad, moving up the neck.
Arpeggio
Chord tones across the neck — the scale map filtered to the arpeggio.
Chord Builder
Enter a voicing by fretboard, keys, or tab to identify the chord.
Scale
Map of the current mode across the fretboard or keyboard.
Metronome
Click track with tempo, tap, and time-signature control.
Vibe generator
Roll a mood — get a matching key, mode and tempo, then apply it to retune the whole board.
Song structure
Typical sections, their usual bar counts, and the classic forms they're arranged into.