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Wiring Colour Code Convention for Soundtronics / MFOS Synth Panels

Having a colour code for your synth panel wiring is purely optional but is something we at Soundtronics are now standardising on. Each of our module KB articles will be specifying the colour code we have adopted and you are of course free to adopt this as well. Well it certainly aids in the reduction of wiring mistakes and makes fault finding on panel wiring that much more easier. Assigning a colour to a function is arbitrary, some modules have the panel wiring numbered with a 'X' prefix whilst others have a sort of mnemonic code relating to the function or component number.

You can purchase what we are calling X24 wire kits that consist of twenty four x 1m lengths of different colour stranded 7/0.2mm equipment wire + 2m of Green and 1m each of Red and Black. This is a typical wiring schedule for in this case a VCO module:

 

VCO Module
Number Colour Mnemonic Function
X1 Brown SIN Sine Output Socket
X2 Pink TRI Triangle Output Socket
X3 Orange RMP Ramp Output Socket
X4 Yellow SQR Pulse / Square Output Socket
X5 Green/Red LIN Linear CV Input Socket
X6 Blue CV1 FM1 Input Socket & Pot
X7 Violet CV2 FM2 Input Socket & Pot
X8 Grey CV3 CV Input Socket
X9 White SYNC Sync Input Socket
X10 White/Black PWM PWM CV Input Socket
X11 Red/Brown R2P3 Coarse Pot R2 CW Pin
X12 Red/Blue R2P2 Coarse Pot R2 Wiper Pin
X13 Orange/Black R2P1 Coarse Pot R2 CCW Pin
X14 Yellow/Red R3P3 Fine Pot R3 CW Pin
X15 Red/Green R3P2 Fine Pot R3 Wiper Pin
X16 Grey/Blue R3P1 Fine Pot R3 CCW Pin
X17 Violet/Red R39P1 PWM Pot R39 CW Pin
X18 Grey/Black R39P2 PWM Pot R39 CW Pin
X19 White/Red R39P3 PWM Pot R39 CW Pin
X20 Yellow/Black   n/a
X21 Pink/Black   n/a
X22 Red/Black   n/a
X23 Orange/Red   n/a
X24 Yellow/Green   n/a
  Green   Ground / 0V
  Red   +12V (+15V)
  Black   -12V (-15V)

 

We do not tend to use much of the Red & Black as we use a 3-core cable for the power connection to the modules but is included just in case the need arises.