Sidekick with 4-Pole Mission filter board?

Technology Synth-DIY
#1

Hi!

Would the new 4-pole mission filter board work with the the Sidekick??

Cheers!

#2

Not unless you are prepared to modify the filter board.

#3

You would need to somehow generate the Signal the Shruthi delivers to the 74xx595 shift register. Or you simply get the schematics for a 595 and replace the Chips output with some 1PDT Toggel Switches that switch GND/+5V and see what happens - that would be the more SideKick Way :wink:

edit:

Heres a quick and Dirty Hacking Guide:

  • remove the 595
  • the green pads are the ones that further switch something on the board using the 4053 and 4051 so you have to feed in something here - connect each pad either to +5V (red pad) or GND (blue Pad). USe some Breadboard Wires. If you don’t connect these Pads the are Floating and the Value will be unpredictable (aka SideKicky)
  • from the schematics Q1-Q3 switch the 4053 to which various WaveShaping thingies are connected, so likely here the resonance Flayours are switched
  • Q4-Q6 goe to the 4051 that switches several different sets of LP1-4 Outputs via the Resistors above to the OutputAmp - so here you likely switch the different Filter Modes.
  • You can’t do any damage if you don’t short anything - so go on and try!
#4

Without a manual switching mechanism (as detailed above) it will be in the default mode all of the time.

I guess you might be able to use a spare digital control board to control the filter mode but feed the CV with a sidekick. Big mess of cables and you would need to power the control board from another filter board that doesn’t have the second port (SMR for example).