REMS
Free · 1.3WAVETABLE SYNTHESIZER

Halcyon

A polyphonic synth in the spirit of Serum, Vital and Diva, with wooden end cheeks, a needle VU meter and over 2,000 ready-to-play sounds.

$0, pay what you want · v1.3.0 · VST3 · AU · LV2 · Standalone · Mac, Windows, Linux

Halcyon interface, Synth page

3 wavetable oscillators, 2 filters, 4 envelopes, 4 LFOs. The Time Machine is set to 1985.

2,342factory presets
31categories
16unison voices per oscillator
5Time Machine eras

Demo

Halcyon in action

1:34 · sound on

Features

Everything inside

Vital & Serum 2 import

Drop a .vital or .SerumPreset file on Halcyon and play your sounds, wavetables and macros included. Load your own .wav wavetables too.

3 oscillators, 3 engines

Wavetable, granular (load your own samples) or spectral with up to 96 partials, plus a sampler mode.

Time Machine

One slider sends the whole sound from the 70s to today: tape, 12-bit DACs, rave samplers…

Breed

Cross two presets, set the mutation, and 8 new sounds are born, already test-played and level-matched.

Analog-style filters

Ladder, "acid" diode, SVF, comb and formant, in series or parallel.

Arp, mod matrix, effects

16-step arpeggiator, 16-slot mod matrix, 10 effects including Juno chorus and tape.

Classics

10 categories in the spirit of the synths that made history, from the 70s mono ladder synth to 80s FM keys and the 8-bit sampler.

MPE

Play it from an MPE controller with per-note bend, pressure and slide.

Six skins

From the wooden Vintage to Midnight, Synthwave or the light Studio skin.

Listen

Classics presets, straight out of Halcyon

Specs

System requirements

Version
1.3.0 · October 19, 2026
macOS
VST3, AU, Standalone · Apple Silicon + Intel, 10.13+
Windows
VST3, Standalone · Windows 10/11, 64-bit
Linux
VST3, LV2, Standalone · x86_64, glibc 2.35+
Price
Free, pay what you want

Install guide and macOS fix → · Changelog →

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