MusicGen

Generate electronic music without AI

Requirements

Rust 1.87.0+

Build

git clone <repository-url>
cd music
cargo build --release

TOML Configuration

Create declaritive songs with structured TOML:

cargo run --bin musicgen toml examples/enchanted.toml

From Binary

./target/release/musicgen toml examples/enchanted.toml

Basic TOML Structure

[composition]
key = 60
scale = "minor"
tempo = 85.0
measures = 16

[[tracks]]
name = "bass"
instrument = "sine"
volume = 0.8

[tracks.pattern]
type = "custom"

[[tracks.pattern.steps]]
time = 0.0
note = "C2"
duration = 0.75
velocity = 0.9

[export]
filename = "my_song"
format = "wav"

Definitions

Track - Each track like a single instrument in a band (like the bass or drums)
Pattern - The sequence of notes that a track plays.
Steps - Individual notes in your pattern.
Velocity - How loud to play the note (0.0 = whisper quiet, 1.0 = full volume)
Loop Length - How long your pattern is before it repeats (in beats)
Measures - Groups of beats (usually 4 beats = 1 measure). Like counting "1-2-3-4, 1-2-3-4"
Tempo/BPM - How fast the song goes. 120 BPM = 120 beats per minute
Key - What note the song is "centered" around (like C major or A minor)
MIDI Notes - Just numbers for musical notes. 60 = middle C, 69 = A above middle C. Or use note names like "C4" or "A4"
Duration - How long a note plays for (in beats). 1.0 = one full beat, 0.5 = half a beat
Waveforms - The "shape" of the sound. Sine = smooth/warm, Square = retro video game, Sawtooth = buzzy/bright
Effects - Things that change how your track sounds. Lowpass = makes it muffled, Delay = adds echo
Time Signature - How many beats per measure. 4/4 means 4 beats per measure (most common)
Chord - Multiple notes played together. Like C major = C + E + G played at the same time
Arpeggio - Playing chord notes one after another instead of all together

Available Options

Instruments: sine, square, sawtooth, triangle, noise, piano
Scales: major, minor, dorian, pentatonic, blues, chromatic
Keys: MIDI numbers (60 = C4) or note names ("C4", "F#3")
Pattern Types: custom, chord, arpeggio, sequence
Effects: lowpass, highpass, delay, reverb, chorus, distortion

Track Configuration

[[tracks]]
name = "bass"
instrument = "sine"
volume = 0.8

[tracks.pattern]
type = "custom"
loop_length = 4.0

[[tracks.pattern.steps]]
time = 0.0
note = "C2"
duration = 0.75
velocity = 0.9

[[tracks.pattern.steps]]
time = 2.0
note = "G2"
duration = 0.75
velocity = 0.8

[[tracks.effects]]
type = "lowpass"
cutoff = 400.0
resonance = 1.8

[[tracks]]
name = "drums"
instrument = "noise"
volume = 0.6

[tracks.pattern]
type = "custom"

[[tracks.pattern.steps]]
time = 0.0
note = "C1"
duration = 0.1
velocity = 1.0

[[tracks.pattern.steps]]
time = 1.0
note = "E3"
duration = 0.05
velocity = 0.7

See composition-schema for a complete example and the full schema.

Output

All audio files are saved to the output/ directory.

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