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Includes allen key

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CV input: 3.5mm jack socket (near yellow VCO knob): 0v to 5v

Trig input: 3.5mm jack socket (centre): 2 to 10v

Audio out: 3.5mm stereo jack socket (near grey volume knob), drives headphones.


10 separate LED’s of various colours. Aside from showing the current status of the LFO, envelope generator, battery and external trigger. The LED’s also show the modulation destinations when the black push-button is pressed.

External CV voltage shown by the ‘analog’ LED by the black push-button.


1st knob, yellow – VCO frequency

2nd knob, yellow – VCO & LFO modulation depth control

3rd knob, blue – Waveshapes for VCO and LFO

4th knob, blue – LFO speed

5th knob, green – External CV modulation depth control

6th knob, red – Attack, envelope generator

7th knob, red – Release, envelope generator

8th knob, green – Patch control

9th knob, grey – Volume control


On-Off switch (right-hand toggle)

Envelope mode (left-hand toggle) >up=auto-repeat, centre=single shot (no sustain), down=single shot (sustain allowed).

Black push-button >press to see and modify the external modulation-destination.

Red push-button >triggers envelope generator, effectively in parallel with external trigger


3x AAA cells, alkaline or rechargeable types. Supplied allen key loosens four screws to allow stainless steel base plate to be removed.

Unibody construction

CNC machined from a solid lump of transparent acrylic polymer, hand frosted with alumina. Stainless steel base plate/battery lid. Four rubber feet.

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Listed2 years ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.learn more
  • BC-9 Digital Synthesizer

Donki Ra

Jackson, NJ, United States
Joined Reverb:2017

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