Downspout VST3 plugins
All plugins

MIDI generator

Harmonic Atlas

Seeded autonomous chord and scale guidance with tonal, modal, chromatic-mediant, and neo-Riemannian-inspired movement.

Bundle
harmonic_atlas.vst3
Role
Autonomous harmony
Harmonic Atlas plugin interface

Harmonic Atlas generates bounded, voice-led harmony without MIDI input and can optionally follow incoming pitch classes. Stop, loop, seek, and tempo behavior are derived from absolute host position.