Self-patching Quadra in a similar manner can make a 2-axis wave table synth voice (lfo 1=base oscillator, cv1=rise/pitch, lfos 2 and 3 patched into fall and shape) I’m hoping to play around with this soon, and mess around with channel 4 in AD or AHR mode modulating levels of various parameters.
Lovely. Yummy 
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I have a quick question with regards to Quadrax’ self-attenuating capabilities: if you patch some CV into one of the channel’s dedicated input and assign it to LEVEL, you’re able to control the attenuation of the output (say the range of an LFO). Is there a way to have Quadrax attenuate the signal itself, using the different 25% increments of the LEVEL button, instead of having to patch something external? If I’m not patching anything on the input assigned to LEVEL, all lit modes result in complete attenuation, and I only get a completely unattenuated signal when the button isn’t lit. Am I missing something or is it just that Quadrax requires external input to use LEVEL?
No you are not missing anything, that is how it works. You’d need an offset in the CV input.
I wonder if this qualifies for a reasonable feature request, it feels like the feature is here, one can imagine it would be a simple enough trick to pull off? @kamil, what do you think?
It’s definitely possible to do, but I am not sure how it would work UI-wise. One way would be to add a 3rd state for the attenuator accessed via long-hold that would basically act as a constant for that channel. Eg: long hold would cycle through positive → negative → constant. In constant mode it would ignore the incoming CV for that mapping and just treat it as maximum, then attenuate based on the attenuator setting.
It could get confusing if you have multiple CV channels in the matrix affecting the same channel, but I guess with level that is already the case.
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Interesting, I haven’t used it that way yet. I’m not sure I can help answer your question (sounds like @kamil has it under control), but I’m glad you reminded me about this! It might save me using a channel of Triplatt or Quad VCA sometimes. 
Another thing that I think was discussed at some point on the forum was the idea of having certain voltages normalled if no input was present. This could also be used to change the range of certain parameters.
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There is no way to detect if CV is present or not
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…switching jacks?
The Quadrax does not have them