Chord progression is the sequence of chords that forms the harmonic foundation of music — AI generates progressions that create emotional movement, tension, and resolution, following music theory principles while exploring creative harmonic possibilities across genres.

What Is Chord Progression?

• Definition: Ordered sequence of chords in a piece.
• Function: Provide harmonic structure, create emotional journey.
• Notation: Roman numerals (I, IV, V) or chord symbols (C, F, G).

Common Progressions

Pop: I-V-vi-IV (C-G-Am-F) — "Don't Stop Believin', "Let It Be." Blues: I-I-I-I-IV-IV-I-I-V-IV-I-I (12-bar blues). Jazz: ii-V-I (Dm7-G7-Cmaj7) — most common jazz progression. Rock: I-IV-V (C-F-G) — classic rock progression. Minor: i-VI-III-VII (Am-F-C-G) — emotional, dramatic.

Harmonic Functions: Tonic (home, stable), Subdominant (away from home), Dominant (tension, wants to resolve).

AI Generation: Markov chains (learn transition probabilities), neural networks (RNNs, transformers), rule-based (music theory), style transfer (emulate artists).

Applications: Songwriting, improvisation backing, music education, composition tools.

Tools: Hookpad, ChordAI, Chordbot, AutoChords, Suggester.