Cosmo PD-101#

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

Quick Links#

• Getting Started -- Install, connect MIDI, and play your first note.
• Web App -- Use the synth in your browser -- no installation needed.
• Synth Reference -- Deep-dive into oscillators, algorithms, envelopes, modulation, and FX.
• Presets -- Load, save, organize, and share your sounds.
• Troubleshooting -- Common issues and how to fix them.

About This Synth#

Cosmo PD-101 is inspired by the Casio CZ-101's phase distortion engine but goes further with:

• 15 sound generation algorithms -- bend, sync, pinch, fold, skew, twist, clip, ripple, mirror, karpunk, fof, terrain, stutter, cheby, plus the classic CZ-101 algorithm
• Dual oscillator lines with independent envelopes, detune, and the possibility to blend a secondary algorithm
• 8-step step-function envelopes -- pitch, waveshape, and amplitude per line
• Modulation matrix -- 11 sources routing to most synth parameters
• 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) or VST3/CLAP/AUv2 plugin

Support the Project#

Cosmo PD-101 is free and open source under the GPLv3 license. If you find it useful, financial support helps cover hosting, development tools, and future features — and is deeply appreciated.

purraudio.dev/store

Project Links#