Instrument o’ the Week: The Atomosyth Abyssal

The Abyssal is a photo-noise synth and oscillating filter. It uses one square and saw waveform VCO (voltage controlled oscillator) with a huge pitch range, from subsonic to ultrasonic sound controlled by a big photocell (pitch control) allowing to play it like a photo Theremin, one square and triangle waveform LFO (low frequency oscillator), that can modulate the VCO for the vibrato effect creating arcade Atari-like sounds; and also can modulate the filter creating a resonant tremolo effect, and one white noise generator that modulates the frequency of the VCO. However it works, one thing is clear: this thing produces some seriously creepy UFO music. Enjoy.