Crate trem 

trem — mathematical music engine

Core library for exact-arithmetic music composition and audio processing. No I/O dependencies — this crate compiles to WASM and renders offline.

Key modules

• math — Exact rational arithmetic (Rational = p/q in lowest terms)
• pitch — Pitch representation, scales, and tuning systems (EDO, just intonation, free)
• time — Beat-accurate durations and time spans
• event — Note events (scale degree + octave + velocity) and graph events (frequency + voice)
• tree — Recursive temporal trees for rhythmic subdivision (Seq, Par, Weight)
• grid — 2D step sequencer grid (rows = steps, columns = voices)
• graph — Audio processing DAG with typed processor nodes
• dsp — Built-in processors: oscillators, envelopes, filters, distortion, effects, drum synths, plus composite voices dsp::analog_voice and dsp::lead_voice
• euclidean — Euclidean rhythm generation (Toussaint 2005)
• render — Offline rendering of trees/grids through audio graphs

Modules

dsp

Audio DSP processors for the Trem graph: oscillators, envelopes, dynamics, mixing, filters, noise, drum voices, time-based effects, EQ, and composable graph voices.

euclidean

Evenly spaced onsets (Euclidean rhythms) and cyclic pattern rotation.

event

Composition-layer note data and runtime graph events with sample timing.

graph

Audio graph: Processor nodes, routing, block processing, and parameter introspection.

grid

Row/column pattern editor backed by a flat cell vec and Tree conversion.

math

Exact arithmetic for time and rhythm backed by num_rational::Rational64.

pitch

Pitch representation, scales, and tuning systems.

registry

Processor registry: create processors by short tag at runtime.

render

Turn Trees and Grids into TimedEvents and offline multi-block Graph renders.

time

Beat-based durations and half-open time spans using exact Rational math.

tree

Hierarchical rhythm trees: sequential splits, parallel layers, and weighted subdivisions.