NLC Nonlinear Circuits Dactrol

NLC Dactrol

• 4 hp, Black Panel
• Fresh build, tested, and fully functional
• Reverse power protection installed, comes with power cable
• Built with highest quality WQP-518MA jacks (20k+cycles)
  

Further information from nonlinearcircuits:

This is a design by Tom Hirst (who also designed the NLC Snake Joke module).

His description for the design is:

“It's a vactrol-based multiplying-DAC (digital to analog converter). It basically naively uses vactrols as kind

of switches to convert a 4 bit number to an analog voltage. But being a multiplying DAC it also takes a

reference voltage so the output is relative both to the reference voltage and the size of the 4 bit number.”

REF1 is preset via REF1 jack switching pin, so you can just turn up the REF1

pot if you want a static voltage or offset, then feed gates or CVs to BIT 1-4

inputs. The module is quite fun to use with modulating CVs or audio on the REF

inputs. It is quite happy to accept negative going voltages on the REF inputs

as well.

Using vactrols for DAC processing means it will be slow and slew, depending on

the recovery speed of your vactrols. Consider this as a pattern generator or a

somewhat strange VCA or, if you must, a DAC.