Wednesday, July 16, 2014

Werkstatt Mods cont.

I found that the 1 octave keyboard ranges from 0-3v.  So, when a standard 1v/oct is applied, the scaling is nowhere near 1v/oct.  This is a bummer as I wanted to break the keyboard connection to the VCO so I could send the incoming CV through the glide circuit.  In order to make it work (as far as I can see) is either add a 4053 to switch between 2 different trimmer/resistors that are both set for either 1v/oct or 3whateverV/oct the Werkstatt keyboard is  (linear?) ... or, ditch the keyboard completely and re-purpose the glide to go through the VCO exp IN only.  I don't like either of those options.  I'm ok with adding a panel to the back for a row of 3.5mm jacks, but I'm not a fan of switches and pots sticking out hear and there.  I'd rather just add glide externally instead.

On the plus side, I designed a panel for the row of jacks I'll be adding to the back. Most of them are just taken right from the header patchbay.  Instead of a straight VCO out, I'll route the square and saw waves to separate jacks.  I'll more than likely remove the jumper on the PCB between the VCO and VCF and normal it to the Audio IN.  This way I can send audio through without the VCO mixed in.  Having the saw and square waves separate I can route those through modules and add other VCO's, then through a mixer and back into the Audio IN on the Werkstatt.  The overall plan is is to keep everything relatively simple but still useful.  The thing that makes the Werkstatt so much fun is its simplicity.   I could go crazy and add a daughter board with a 2nd VCO with saw/square/triangle, a mixer section, a noise source, S&H, etc etc etc all with SMD parts, then create a new case with knobs and switches galore....  but why?!  I have plenty of other synths that do that.

I may add a midimplant though.  We shall see.

EDIT: Updated I/O Panel above!

Once I nail down a panel design, I'll offer to do this mod if there's enough interest. 

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