mcp_opendaw_create_pedal_point
Create sustained bass notes under changing chords to build harmonic tension and release, using customizable pitch, chord progressions, and timing.
Instructions
Create a pedal point — sustained bass tone under changing chords.
A foundational technique in film scoring (Hans Zimmer drones), organ preludes (Bach), and rock ballads. A single low note sustains (or retriggers) while chords change above it, creating harmonic tension and release. The pedal anchors the harmony while the chords create movement.
pedal_pitch: Sustained bass note (default 36 = C2, low and powerful). chord_pattern: Comma-separated chord names (e.g. "Cm,Ab,Eb,Bb"). Supports: maj, min, m7, maj7, dom7, sus2, sus4, dim, aug. bars_per_chord: Bars each chord lasts (1-8, default 1). beats_per_bar: Time signature beats (3/4=3, 4/4=4, 6/8=6, default 4). pedal_velocity: Velocity of pedal note (0-1, default 0.75). chord_velocity: Velocity of chord notes (0-1, default 0.6). chord_octave: Octave for chord notes (1-8, default 4 = C4 range). retrigger_pedal: If true, pedal re-triggers at each chord change. If false, one long sustained note for the entire duration. unit_index: AU index with note track (-1 = find first AU with note tracks). track_index: Note track index within the AU. start_beat: Position in beats where the pedal point begins.
Returns notes created, chord count, pedal duration.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| start_beat | No | ||
| unit_index | No | ||
| pedal_pitch | No | ||
| track_index | No | ||
| chord_octave | No | ||
| beats_per_bar | No | ||
| chord_pattern | No | Cm,Ab,Eb,Bb | |
| bars_per_chord | No | ||
| chord_velocity | No | ||
| pedal_velocity | No | ||
| retrigger_pedal | No |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |