PianoMomo

MIDI Keyboard

Connect your MIDI controller. Click MIDI input in the top bar to select your device. Supports sustain pedal input (CC 64).

Computer Keyboard

Play on your typing keyboard starting from A (middle C):

Use Z / X to shift octaves.

Mouse & Touch

Click or tap the keys on the visual keyboard at the bottom. Use the Sustain pedal option to keep notes ringing.

Visualizing Chords

When you play notes, they form a chord which is highlighted on the circle of fifths:

• Active Chord: Teal segment
• Suggestions: Amber segments
• Key Center: Outlined blue ring

Auditioning

Click any wedge on the Circle of Fifths to preview that chord. Tap any suggestion chip in the readout panel to play a preview of the recommended transition.

Adding Chords from the Wheel

Double-click (or double-tap) a wedge to add it straight to your Chord List, or drag it and drop it onto the list panel.

Chord Reference

Click the Chords floating button to open the reference chart. Select any root note to view keyboard diagrams and formulas. Click a card to preview its sound, or press + to add it to your progression.

Progression Builder (Chord List)

The Chord List panel (and, on desktop, the Chord Reference panel) is open by default — use the floating buttons to toggle either one. Here you can:

• Drag and drop cards using the grab handle to reorder.
• Choose between professional songwriting presets — the dropdown keeps showing the loaded preset's name, and every preset always builds from the same fixed root, so switching between them stays predictable.
• Add chords while a progression is playing — playback keeps going and picks up the new chord in sequence.
• Configure playback style (Block, Arpeggiated, Walking Bass, Stride, Alberti, Ambient Roll).
• Set the interval, toggle infinite looping, and toggle whether the bass note plays.
• Inversions: when on, each chord voices itself in whichever inversion sits closest to the previous chord for smoother voice leading — the note list under each card updates live to show the actual voicing, both during playback and as soon as you toggle it.
• Base Octave: sets the register the Inversions engine centers around (C2–C6) — long or looping progressions gently gravitate back to this register instead of drifting up or down over time.