In another post regarding disabling the input normalization on the audio inputs , user shensly mentioned some simple mods that might be possible to change the hardware configuration of the Patch module itself. I myself have had a hard time chasing down some details on the patch’s PCB revisions and would like some help (such as the normaling resistors mentioned in the above post).
I should note that I do not currently own a Patch module, but I am trying to see if what I want to do is possible based on online resources and will order one as soon as I get more information.
For my application, I am wondering about disabling/shorting around the AC coupling on the AUDIO INPUTS so that I can use them for CV control. I have found a few threads about people trying this for the audio outputs, but not much on the audio inputs themselves. From the schematics, it looks like there isn’t a coupling cap on audio inputs 1 and 2, but there is on inputs 3 and 4. I recognize that this becomes a bit more complicated with the usage of the codec and its specific settings, so I am hoping someone can shed more light on how all of that works together and why the circuit paths look different.
My goal is to to make a sort of chord multi-oscillator with four v/oct CV inputs AND at least 1 extra CV input to change some sort of parameter about the oscillators (waveshape, detune, or something).
So this post has a few purposes: 1) to start a discussion about Patch mods people have tried, 2) to maybe help work out new mods that haven’t been attempted yet, 3) collect some more details on board revision details, and 4) (selfishly) help me figure if its possible to convert (any or all) the audio inputs to DC coupling.