harmony generation

**Harmony generation** uses **AI to create chord progressions and multi-voice arrangements** — generating chords that support melodies, creating harmonic movement, tension, and resolution that gives music emotional depth and structural foundation. **What Is Harmony Generation?** - **Definition**: AI creation of chords and chord progressions. - **Output**: Chord sequences, multi-voice MIDI, figured bass. - **Goal**: Musically pleasing harmonic support for melodies. **Harmonic Elements** **Chords**: Multiple notes played together (triads, 7ths, extensions). **Progressions**: Sequence of chords (I-IV-V-I, ii-V-I). **Voice Leading**: Smooth movement between chord tones. **Cadences**: Harmonic endings (authentic, plagal, deceptive). **Modulation**: Key changes within piece. **Common Progressions**: I-V-vi-IV (pop), ii-V-I (jazz), I-IV-I-V (blues), i-VI-III-VII (minor). **AI Approaches**: Rule-based (music theory), probabilistic (Markov chains), neural networks (RNNs, transformers), constraint satisfaction. **Applications**: Accompaniment generation, reharmonization, jazz comping, orchestration. **Tools**: Hookpad, ChordAI, Chordbot, Band-in-a-Box, Magenta Coconet.