PolyRex vintage polyphonic synth plugin interface by Safari Audio

PolyRex: Vintage-Inspired Polyphonic Synth by Safari Audio

PolyRex is a vintage-inspired polyphonic synthesizer plugin from Safari Audio, built around early 1980s poly synth sounds. It is available in VST3, AU and AAX formats for Windows and macOS.

VST3AUAAXWindowsmacOS64-bit

AVAILABLE ATPlugin Boutique

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01Overview

PolyRex is a polyphonic synth plugin from Safari Audio, inspired by analog polysynths from the early 1980s. The developer describes it as a synth built to feel immediate and nostalgic, with a playful character aimed at producers who want to sketch ideas quickly. Its oscillator, filter and envelope section covers pads, plucks, basses and keys, while built-in chorus, delay and spring effects add shimmer, movement and space without a separate plugin.

Best for

Dreamy synth pads
Vintage keys and tape-style chords
Punchy synth basses
Glassy plucks
Cinematic nostalgic textures
Rhythmic arpeggios

Developer: Safari Audio
Category: Synths
Store: Plugin Boutique

02Key features

What you get

Square oscillator for classic poly synth bite and harmonic weight
Sub oscillator for added low-end body
Noise generator for air, texture and grit
PWM control for animated vintage tones
LFO pitch modulation for drift and unstable character
Resonant filter with vintage-style cutoff behavior
High-pass filter for tighter lows or thinner textures
Full ADSR envelope and envelope/gate mode
Built-in arpeggiator with octave and rate controls
LFO section with rate and delay time controls
Glide for smooth pitch movement
Built-in chorus, delay and spring effects

03In depth

Sound Character and Oscillator Design

PolyRex is built around a square oscillator for the classic poly synth bite and harmonic weight. A sub oscillator adds low-end body, and a noise generator offers air, texture and grit for percussion-style sounds.

Pulse-width modulation and LFO pitch modulation add animated movement and a slightly unstable character, which suits vintage-style tones. The resonant filter is designed for smooth, musical cutoff shaping, and a high-pass filter lets you tighten the low end or create thinner retro textures.

Performance, Movement and Built-In Effects

The full ADSR envelope gives fast shaping for pads, plucks, basses and keys, and an envelope/gate mode lets you choose how the synth responds while you play. A built-in arpeggiator provides rhythmic ideas with octave and rate controls.

The LFO section offers rate and delay time controls for delayed modulation, and glide adds smooth pitch movement. The chorus provides a wide shimmer inspired by classic poly synth records, the delay adds warm analog-style repeats, and the spring effect adds vintage depth and space.

04Specs

Will it run?

Formats, systems and requirements as listed by Plugin Boutique. Missing details are left out, not guessed.

Developer	Safari Audio
Type	Plugin
Category	Synth
Formats	VST3, AU, AAX
Operating systems	Windows, macOS
Architecture	64-bit

05FAQ

Questions, answered

What formats and operating systems does PolyRex support?

PolyRex is available in VST3, AU and AAX formats. It runs on Windows (VST3 and AAX, 64-bit) and macOS (VST3, AU and AAX).

What are the system requirements for PolyRex?

The developer lists a 1 GHz Intel dual-core or AMD equivalent processor and 4GB of RAM minimum, with 8GB recommended. macOS 10.15 or later (11 or later recommended) and Windows 8 or later are supported.

What kind of sounds is PolyRex best suited for?

PolyRex is geared toward vintage-inspired poly synth sounds, including pads, plucks, basses, keys and textured effects. Its arpeggiator and built-in effects also support rhythmic and atmospheric patches.