Cosmo PD-101#

A phase distortion synthesizer inspired by the legendary Casio CZ-101, built in Rust and running on WebAssembly, desktop, and as a DAW plugin.

Quick Links#

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  Getting Started

  Install, connect MIDI, and play your first note.

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  Web App

  Use the synth in your browser — no installation needed.

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  Synth Reference

  Deep-dive into oscillators, algorithms, envelopes, modulation, and FX.

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  Presets

  Load, save, organize, and share your sounds.

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  Troubleshooting

  Common issues and how to fix them.

About This Synth#

Cosmo PD-101 extends the Casio CZ-101's phase distortion engine with:

• 16 original warp algorithms — bend, sync, pinch, fold, skew, twist, clip, ripple, mirror, karpunk, fof, terrain, stutter, cheby, plus the classic 9 CZ-101 waveforms
• Dual oscillator lines with independent envelopes, detune, and algorithm blending
• 8-step step-function envelopes — pitch, waveshape, and amplitude per line
• Modulation matrix — 7 sources routing to 51 destinations
• 6-slot FX chain — 17 effect types including chorus, delay, reverb, phaser, distortion, bitcrusher, and lo-fi
• 8-voice polyphony rendered in SIMD-4 batches for maximum performance
• Runs as a Web Audio AudioWorklet (Wasm), Tauri desktop app, or VST3/CLAP/AUv2 plugin

Project Links#