above photo from the collection of Doug Ferguson, Ft. Worth, TX, used by the band "Ohm"
The SQ-01 is a microprocessor-controlled sequencer with an onboard monophonic synthesizer and a single-octave, 13-note (C-C) capacitance (touch) keyboard painted onto its main panel. It was marketed mainly by Multivox, who frequently distributed other companies' instruments.
The synthesizer section has knobs for tune, fine tune for the single VCO, and for cutoff frequency and resonance for the filter. The envelope generator can be set ASR or AR with knobs controlling the release time and sustain level. There is also a master volume knob for the synthesizer.