When Elka released the Synthex in 1982, they created something that still stands apart from its American competitors—a genuinely Italian take on polyphonic synthesis that combined rock-solid digital oscillator stability with the warmth of analog circuitry. It arrived at a moment when digital control was becoming essential for reliable tuning, but analog sound was still king, and the Synthex nailed that balance in a way that feels almost prescient.
The Synthex gives you eight voices of polyphony, each with two digitally controlled oscillators that stay locked in tune across temperature changes and time. The heart of the sound comes from a 4-pole multimode filter with lowpass, highpass, and bandpass modes, fed by two independent ADSR envelopes—one shaping the filter, one shaping the amplifier. Two LFOs provide modulation depth, with the first offering selectable waveforms for complex modulation routings to oscillators, pulse width, filter, or amplifier. Instead of traditional wheels, you get a joystick for real-time control, with six sliders letting you assign what modulates what. The Synthex also includes a built-in digital ring modulator and a three-mode chorus that adds genuine dimension to the sound. You can layer, split, or double voices across the keyboard, and there's a four-track sequencer with real-time and step-time programming, cassette backup, and 40 factory presets plus 40 user memory slots.
The Synthex earned cult status over the decades for its distinctive character—lush, stable, and capable of everything from orchestral textures to aggressive leads. The joystick control became iconic among players who wanted hands-on real-time expression, and the combination of stable oscillators with that particular filter character gave it a sonic signature that never quite got replicated. Some users note the onboard fan can be audible and MIDI support came late to the platform, but these are minor quirks in an otherwise robust machine. It remains a hidden gem in the vintage synth world, valued by those who appreciate Italian engineering and a sound that sits somewhere between the Prophet-5 and something entirely its own.
