Cirrus

Cirrus — Polyphonic Granular Synthesizer

Cirrus is a polyphonic granular synthesizer with a per-voice grain cloud capable of generating up to 64 simultaneous grains per voice. Forty built-in waveform textures provide the raw grain source material, and you can load your own audio samples as a custom grain source with a user-defined root pitch. 99 factory presets are included.

Features:

• Per-voice grain cloud with up to 64 simultaneous grains across 16-voice polyphony.
• Core grain parameters: Position, Scatter, Grain Size (1–500 ms), and Density.
• Spatial and pitch shaping: Pitch Spray, Pan Spread, Reverse %, and Stereo Width.
• 40 built-in waveform textures across six categories provide the raw material for your grain cloud — Original waveforms, Harmonic/Additive, Pulse/PWM, Hybrid/Cross-waveforms, Noise/Texture, and Exotic/Special — covering everything from smooth sines to gritty, complex timbres.
• Custom sample loading — load any WAV file as a grain source with user-defined root pitch.
• LFO with 5 waveforms targeting grain position, pitch, grain size, density, pan spread, or filter cutoff.
• Resonant State Variable Filter with key follow and interactive visual curve display.
• Dedicated Filter EG and Amplitude EG, both with full ADSR control and interactive visualisers.
• Global effects chain: Phaser, Chorus, stereo Delay, and Reverb.
• 5-band parametric EQ with interactive visual curve.
• Compressor with real-time metering and gain reduction display.
• 16-voice polyphony with portamento/glide, pitch bend, and mod wheel.
• Virtual on-screen keyboard — no MIDI controller required.
• MIDI CC support (CC 74, 71, 73, 72, 7, 10, 5, 1, 64) — fully DAW-automatable.
• 99 factory presets: evolving pads, atmospheric textures, granular leads, rhythmic clouds, and more.
• Full preset management: save, load, delete, undo/redo.
• VST3, AU, and Standalone.
• macOS 10.13 (High Sierra) or later · Windows 10 or later.
• Single-user license · Activate on up to 2 computers.