Abstract Data:

ADX MK1: Sequenced Analog Synth

Analog monosynth with Vactrol-based Hard Sync and Pulse-
Width Modulation (PWM) and variable Gating effect.

One-off build incorporating an oscillator based on the legendary
555-timer, a number of unique in-house modifications, the beautiful, slewed response of vactrols and a dynamic Gating effect.

Homebrew PCBs and hand-wired internals gave this synth a raw,
rich sound that went well beyond the simplicity of its design.

Elements of this implementation were refined for the MK2s and
then appeared in the core design for the 2009 release of Synthex.