Hold a chord button (I–VII) to play. Release to stop. Only one chord sounds at a time.
♭ Flat — hold to lower the chord root by one semitone (e.g. IV becomes ♭IV).
♯ Sharp — hold to raise the chord root by one semitone (e.g. IV becomes ♯IV).
↔ Swap — hold to flip major chords to minor and vice versa.
All modifiers, type buttons, and slash bass use hold behavior and live-update the sustaining chord. Releasing any of them immediately updates the sound.
Type buttons (7, maj7, min7, sus2, sus4, add9): hold to change the chord quality.
Slash bass: hold a bass note button to add a different bass note in octave 2 (e.g. C/G, Am/E).
Instrument — Piano or Guitar soundfont.
Vol — Master volume (0–20).
Key — Select the musical key. Chord degrees update automatically.
BPM — Tempo for the rhythmic playback (60–180).
Time — Time signature: 4/4, 3/4, or 6/8. Each has its own accent pattern.
Met — Metronome toggle and volume.
Rhythm — When enabled, chords replay on each beat. When disabled, chords play once and sustain until released.
Inv — Chord inversion: Root, 1st, or 2nd.
Pattern — Picking pattern that controls which notes sound on each beat:
| Full Strum | All notes every beat |
| Bass + Chord | Beat 1: bass only, rest: upper tones |
| Boom-Chick | Alternating bass and upper tones |
| Arpeggio Up | Notes one at a time, low to high |
| Arpeggio Down | Notes one at a time, high to low |
| Play Chords (hold to sustain) | |
| 1–3 | Degrees I, II, III |
| 4–6 | Degrees IV, V, VI |
| 7 | Degree VII |
| Modifiers (hold) | |
| 8 | Flat (lower root by semitone) |
| 9 | Sharp (raise root by semitone) |
| + | Swap major/minor quality |
| Chord Type (hold) | |
| A | 7th |
| S | maj7 |
| D | min7 |
| F | sus2 |
| G | sus4 |
| H | add9 |
| Slash Bass (hold) | |
| Q–P | C Db D Eb E F Gb G Ab A |
| [ ] | Bb B |
| Other | |
| ← → | Change key |