mcp_opendaw_create_random_walk_melody
Generate a melody by walking up or down a scale stepwise, producing coherent yet unpredictable sequences. Adjust step size, direction bias, rests, and note durations.
Instructions
Create a melody using a random walk through a scale — stochastic generation.
Each note is chosen by walking up or down the scale from the previous note. The walk is constrained by max_step (how many scale degrees can move per step) and direction_bias (probability of ascending vs descending).
This produces melodies that feel coherent (smooth stepwise motion) yet unpredictable — the hallmark of generative music. Brian Eno's generative systems, Xenakis's stochastic pieces, ambient textures, IDM melodies.
Unlike generate_melody (contour-guided weighted random), random walk produces stepwise motion where each note depends on the previous one — creating the melodic continuity that contour guidance doesn't guarantee.
Args: root: Root note name (C, C#, D, ...). scale: Scale name (major, minor, dorian, phrygian, lydian, mixolydian, harmonic_minor, melodic_minor, pentatonic_major, pentatonic_minor, blues). bars: Number of bars (1-32). At default duration=0.5, 4 bars = 32 notes. octave: Starting MIDI octave (1-6, default 4 = C4=60). max_step: Maximum scale steps per move (1-7, default 3). 1 = only adjacent scale tones (very smooth, stepwise). 2 = allow skips of up to a third. 3 = up to a fourth (mix of steps and skips). 5 = up to a sixth (dramatic leaps). 7 = full octave (free movement). direction_bias: -1.0 to +1.0 (default 0 = equal up/down). Negative = tend downward, positive = tend upward. 0.5 = 75% chance up, 25% down. duration: Note duration in beats (0.0625-4.0, default 0.5 = eighth). duration_variation: "none" (uniform), "slight" (+/-50%), "wide" (16th to half), "dotted" (mix of dotted and straight). rest_probability: 0-0.5 (default 0 = no rests). Inserts rests instead of notes at the given probability. velocity: Base velocity 0-1. velocity_variation: "none" (uniform), "slight" (+/-0.1), "dynamic" (+/-0.3), "human" (gaussian-ish, +/-0.15). boundary_behavior: "reflect" (bounce back at octave limits), "wrap" (wrap around), "clamp" (stay at boundary). seed: PRNG seed for reproducibility. unit_index: AU index. track_index: Note track index. start_beat: Starting beat position.
Returns notes created, walk statistics (range, average interval, direction ratio), and seed for reproducibility.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| bars | No | ||
| root | No | C | |
| seed | No | ||
| scale | No | minor | |
| octave | No | ||
| duration | No | ||
| max_step | No | ||
| velocity | No | ||
| start_beat | No | ||
| unit_index | No | ||
| track_index | No | ||
| direction_bias | No | ||
| rest_probability | No | ||
| boundary_behavior | No | reflect | |
| duration_variation | No | none | |
| velocity_variation | No | none |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |