Oscen

Oscen ["oh-sin"] is a library for writing audio software in Rust.

At its core is a graph-based processing engine where nodes (oscillators, filters, envelopes, effects) connect through typed endpoints. The graph! macro lets you define synthesizers declaratively, with automatic topological sorting and sample-by-sample processing.

Example

use oscen::prelude::*;
use oscen_macros::graph;

graph! {
    name: Synth;

    // Control inputs with defaults
    input mod_freq: value = 5.0;
    input mod_depth: value = 0.2;
    input carrier_freq: value = 440.0;
    input cutoff: value = 1200.0;

    // Audio output
    output audio_out: stream;

    // Define nodes
    nodes {
        modulator = PolyBlepOscillator::sine(5.0, 0.2);
        carrier = PolyBlepOscillator::saw(440.0, 0.5);
        filter = TptFilter::new(1200.0, 0.707);
    }

    // Connect nodes
    connections {
        mod_freq -> modulator.frequency;
        mod_depth -> modulator.amplitude;
        carrier_freq -> carrier.frequency;
        cutoff -> filter.cutoff;
        modulator.output -> carrier.frequency_mod;
        carrier.output -> filter.input;
        filter.output -> audio_out;
    }
}