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Free Software Synthesizer, Moodysix, Emulates Classic Korg Polysix

16 May, 2026 Software Synthesizers & Samplers

Overload Audio has introduced MOODYSIX for Mac and Windows, a 6-voice s0ftware synthesizer modeled on the 1981 Korg Polysix.

Like the original, it features one oscillator per voice with saw, pulse width, and PWM waveforms, a sub oscillator, the iconic SSM2044-style 4-pole lowpass filter, and the legendary chorus/phaser/ensemble effects section.

MOODYSIX also includes three classic Polysix hardware mods:

NoisySix — Adds white and pink noise generators plus an extended MG (LFO) with triangle, saw up, saw down, square, sample & hold, and noise shapes. Variable pulse width for the square LFO.
Polysex — Pitch envelope modulation with polarity and reference controls. Voice spread with EG and LFO modulation for thick detuned sounds.
ModyPoly — Smooth portamento/glide that works properly across all voice modes including unison.

Features:

6-voice polyphonic with poly, 2-voice unison, 3-voice unison, and 6-voice mono modes ($1 per voice!)
Saw, pulse width, and PWM waveforms with dedicated PWM LFO
Sub oscillator (1 or 2 octaves down)
4-pole lowpass filter with resonance, EG intensity (bipolar), and key tracking
ADSR envelope for filter, amplitude and added pitch and voice pitch spread envelope
MG (LFO) with delay, routable to VCO, VCF, VCA as well as voice pitch spread, with additional MG shapes via the noise section
Chorus, phaser, and ensemble effects (Triple BBD-modelled)
Arpeggiator with up/down/up-down modes, 1/2/full octave range, and latch
Hold and chord memory
32 factory presets
Portamento with per-voice glide