Pro Audio

GS Music unveil Zeus – a striking new analog polysynth

Argentinian boutique synth manufacturers GS Music have announced a prototype for a new multi-timbral poly synthesiser: Zeus.

With an attractive classic design inspired by vintage Moog synthesisers, the entirely analog synth uses subtractive synthesis, each voice featuring two VCOs, a mixer, and a VCA.GS Music Zeus

GS Music have announced a prototype for their new analog poly synth, Zeus, featuring a host of promising features and retro aesthetic.

The synth is currently only a protoype, but the demo video on YouTube welcomes “honest and objective” comments.

Previously GS Music released the Apollo I, a small but well-received monophonic synthesiser. Now, Zeus marks the company’s first venture into the world of polyphonic synths.

Other features of the Zeus include a 4 pole (24dB/oct) lowpass filter with resonance control, as well as three LFOs and two ADSR envelopes. There is also an inbuilt chorus and delay effect processor. Zeus can be played in different monophonic and polyphonic modes and features a 49-key velocity-sensitive keyboard with aftertouch support – although this may be replaced with a 61 key version for the final product.

Whilst the sound generation is entirely analog, the control signals on each voice are generated digitally by a microcontroller. This enables the saving of presets, which can be viewed on the display along with graphical representations of the envelopes, parameters, and more.

The availability and price of Zeus are still to be announced. For more info head over to the GS Music website.

In the meantime, check out a demo video and a list of features below.


12 voice of polyphony
2 voltage-controlled analog oscillators (VCO) (triangular, saw-tri, sawtooth, pulse) with sub-oscillators
hard-sync, PWM and it is possible to mix pulse with oher waveshapes
24dB/oct (4 poles) lowpass filter with resonance control
2x ADSR (attack, decay, sustain, release) envelopes, velocity to attack
3x LFOs: triangular, ramp up, ramp down, square, sample & hold
effects: chorus & delay
49-key velocity-sensitive keyboard with aftertouch
MIDI in, MIDI out, MIDI thru, audio output (plug 1/4” TRS balanced), sustain, USB, filter CV, amplifier CV & audio input.
Presets: TBD
AC 220V power supply