The Roland SH-09 is a single VCO monophonic analog synthesizer with a 2 1/2 octave, 32-note (F-C) keyboard. The VCO is switchable between 5 octaves. Available waveforms are sawtooth, square, pulse (with pulse width modulation), or white noise. It is possible to select the noise source at your oscillator and still have the sub-oscillator as a waveform. The VCF is self-oscillating and can be modulated by the envelope follower which is wired to the external input. The envelope generator is an ADSR (attack, decay, sustain, release) with a slider for each stage. On the control panel to the left of the keyboard is a horizontal pitch-bend/modulation lever, with pressure up and down controlling modulation amount. There are also two sliders controlling amount of modulation routed to the VCO and VCF, as well as a slider adjusting portamento amount. On the back panel there is a main output, and the CV/gate inputs and outputs.
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Roland SH-09