Purpose

Progression is the harmony engine for a generative set. From a scale and the timeline it builds a voice-led chord progression, shaped by tension, motion, and borrowing, and emits it as chord state for other Cito nodes plus a set of playable voices. You can let it wander, seed and lock a loop, follow a played root, or type a lead-sheet progression directly.

TouchDesigner Use

Wire a timeline clock into Input 0 and a scale into Input 1. Choose a Mode, set the Rate at which chords change, and route chord_state into harmony followers such as Bassline, Comp, and Chord while voices drives a pad or keys instrument. For a fixed progression, set Mode to defined and type the chords into the Progression field.

Inputs And Outputs

• Input 0: timeline timeline clock. Required.
• Input 1: scale scale context. Optional, sets the key.
• Input 2: steer a control used to follow or steer the harmony. Optional.
• Output 0: chord_state the primary harmonic decision for downstream nodes.
• Output 1: voices playable polyphonic voices for an instrument.

Main Controls

• Mode: functional for purposeful changes, wander for free movement, follow to reharmonize around a played root, defined to play a typed progression.
• Rate: how often the chord changes, from beat to four_bars.
• Rootnote: key center.
• Tension, Motion, Borrow: how spicy, how active, and how often chords are borrowed from outside the key.
• Dejavu and Looplen: how strongly the progression locks into a repeating loop and its length.
• Voicing, Voices, Useseventh, Octave: how the chords are voiced.
• Velocity and Retrigger: level and whether voices retrigger on each chord.
• Progression: the typed chord string used in defined mode, for example C Am F G.
• Stepbeats, Steerchannel, Seed: timing of the typed progression, the steer input channel, and repeatable randomness.

Notes

• Send chord_state to every node that should follow the harmony so the whole patch stays in key.
• Raise Dejavu to settle a wandering progression into a memorable loop.
• defined mode reads a lead-sheet string, while follow reharmonizes around the steered root.

Parameters

This operator does not expose user parameters in the extracted schema.

Catalog metadata

Roles

• transform
• mixer
• generator
• composer

Tags

• progression
• chord
• harmony
• timeline
• generative
• jam

Search groups

• timeline
• control
• scale
• harmony
• midi
• compose