Four Voice 75

Four Voice 75 (VST3, CLAP, AUv2)

Four Voice 75 is a programmable polyphonic software synthesizer built around a 1975-style four-module voice programmer.

Each synth voice combines two saw/pulse oscillators with pulse-width control and hard sync. The resonant state-variable filter moves continuously from low-pass through notch to high-pass, while a separate Band Pass switch selects the band-pass response.

Envelope 1 shapes the filter and Envelope 2 shapes the amplifier. A sine or square LFO can modulate both oscillator pitches, pulse width, and filter frequency. The four programmer modules provide independent detune, pan, and level settings that rotate across the eight-voice pool to create a real stereo voice pattern.

Unison stacks all four programmed modules on the newest note. The interactive panel provides 45 host-automatable parameters, a 49-key keyboard, four voice LEDs, a moving filter-mode gauge, randomization, and a scrollable browser containing 64 factory presets.

Highlights:

- Two saw/pulse oscillators per voice with pulse width and hard sync

- State-variable filter morphing from low-pass through notch to high-pass

- Switchable band-pass filter response

- Separate filter and amplifier envelopes

- Sine or square LFO routing to oscillators, pulse width, and filter

- Four programmer modules with independent detune, pan, and level

- Eight-voice polyphony and four-module Unison mode

- 45 host-automatable parameters and 64 factory presets

Formats:

VST3 / CLAP / AUv2

Compatibility:

macOS 14 or later

Windows 11 or later

For problems, questions, or feature requests:

leestrument@gmail.com