auxide-dsp

DSP utilities and trait-based nodes for Auxide 0.2. This crate supplies helper functions, wavetable and window generators, and NodeDef-based DSP blocks that plug into the Auxide kernel via NodeType::External.

• RT-safe: no allocations in process paths; all buffers preallocated during init.
• Helpers: dB/linear conversions, phase increments, ms-to-samples, polyblep, interpolation.
• Tables: sine/saw/square/triangle wavetables, Hann/Hamming/Blackman windows.
• Nodes: Oscillators, Filters, Envelopes, LFO, Effects, Dynamics, Shapers, Pitch/Time, Utility.
• Builders: SynthBuilder, EffectsChainBuilder for easy graph construction.

Status

• ✅ Architecture: Clean trait-based design with proper separation of concerns
• ✅ RT-Safety: Verified no allocations in process_block paths (audit completed)
• ✅ Test Coverage: Basic functionality tests for all nodes
• ⚠️ Advanced Testing: Missing RT allocation counting tests, golden value regression tests
• 📋 Node Coverage: ~40 nodes implemented, missing ~10 for full synthesis toolkit

See AUDIT_REPORT.md for detailed analysis.

Usage

Add to your Cargo.toml:

[dependencies]

auxide = "0.2"

auxide-dsp = { path = "../auxide-dsp" }

Example

use auxide_dsp::builders::SynthBuilder;
use auxide_dsp::nodes::oscillators::SawOsc;
use auxide_dsp::nodes::filters::SvfFilter;
use auxide_dsp::nodes::filters::SvfMode;

let graph = SynthBuilder::new()
    .add_oscillator(SawOsc { freq: 440.0 })
    .add_filter(SvfFilter {
        cutoff: 1000.0,
        resonance: 0.5,
        mode: SvfMode::Lowpass,
    })
    .build_graph();

See examples/ for more usage.