control of each LFO allows additional rate control not often seen in portable synthesizers. Each LFO can produce saw, reverse saw, triangle, and square wave outputs. The Sonic Six also features a ring modulator which allows a player to produce non-chromatic sounds. Audio signals may also be routed through the Moog filter and ring modulator via an external input. The Sonic Six's contour generator is a simple design as compared to other synthesizer models. Attack and release are settable. Sustain is set by a switch, offering infinite (while a key is held) or zero sustain times. Only a single contour generator is shared by both the VCA and filter. The filter is standard -24dB/oct Butterworth filter design featuring filter cutoff, resonance, keyboard control switch, contour amount, and LFO amount. The Sonic Six also features “glissando”, another word for portamento. This can be assigned to both oscillators or just one, depending upon the setting. The Sonic Six also features a built in amplifier and speaker, as well as a standard line level output. References External links Sonic Six at Synthmuseum.com Sonic Six at Vintage Synth Explorer Gordon Reid's retro in Sound On Sound magazine (archive.org) Website with mp3s done entirely on the Sonic Six Sonic Six Test Report - GreatSynthesizers Sonic 6