Gacha Chord: Progression Maker

Chord progression ideas you would never have thought of.

Gacha Chord is an idea machine for chord progressions. Place a chord, and it suggests what could come next — a weighted gacha built on functional harmony.

Three safe picks and two adventurous ones. Whether you want to keep it solid or you need the move you would never have found, one button gives you the options.

Save what you make and take it anywhere.

■ THINK IN ROMAN NUMERALS

Every chord appears both as a scale degree and as a chord name. Change the key and the whole progression moves with it, so you can build in C and shift to the real key later.

■ EVERY SUGGESTION HAS A REASON

Dominant resolutions, secondary dominants, tritone substitutions, modal interchange, passing diminished chords, chromatic mediants. Theoretical destinations, drawn by weight. A star marks the ones that connect most naturally.

Chords are colored by how many non-diatonic tones they hold, so you can see at a glance how far from the key you have wandered.

■ SUBSTITUTE CHORDS

Press and hold a chord to get substitutes based on functional harmony.

■ BUILD IT AND HEAR IT

• Diatonic keyboard (triads, 7ths, 9ths, 11ths)
• Drag to reorder; press and hold to change chord type, inversion, octave, or move by a semitone
• Loop playback, so you hear it while you build
• Dividers to mark out sections
• Transpose or voice-lead the chords inside a single section
• Save favorite chords and recall them from the keyboard

■ FREE

• Chord suggestions from the gacha (every musical feature is free)
• Chord types, inversions, octaves, substitutes
• Loop playback, tempo, key changes
• 3 saved progressions, 4 favorite chords

■ GACHA CHORD PRO (ONE-TIME PURCHASE)

A single purchase unlocks everything below. There is no monthly fee.

• 1,000 saved progressions
• 64 favorite chords
• 6 sounds
• Arpeggio playback
• Notes on saved progressions
• MIDI export (opens straight in GarageBand, Logic and others)

■ WHO IT IS FOR

• Songwriters who want ideas at the 0-to-1 stage
• Anyone who writes in roman numerals and degrees
• Anyone who wants to log the progressions they transcribe
• Anyone who just wants to hear a good chord progression
• Anyone studying functional harmony

■ OTHER

• No network connections at all. No account required
• Everything you make is stored on your device