A three-channel mixer based on a ring modulator circuit.
Each channel has a signal input, a gain knob, and a CV input for voltage-controlled gain. The CV input is summed with the knob position, allowing external modulation around the manual setting. Each channel also has its own individual output, plus there’s a mix output that sums all three channels together.
Documentation: modules — mix/VCA
Product page: microrack — mix/VCA
Is there going to be cv inputs to control the vca/mixer module? When i tend to think of a vca theres typically voltage control. If not is there going to be a dedicated vca with cv inputs on release?
Sure! mixer is going to have 3 channels controlled by voltage!
yes, we will add CV. Here is latest and not release version, I will add more info about changes we plan to implement before release.
Im probably more excited for this module than i should be. Its a great example of a dual use module and a very useful one being that, seeing as you can never have enough vcas and mixers in your system haha
Module description was updated!
Mixer, 3x vca and 3x inverter now im getting even more excited for this module than i probably should be 
Hi can the mixer module be made as an optional add-on on Kickstarter? Would love to explore feeding multiple VCOs into one effects chain (unless there is a way that I am missing out by looking at the module pictures)
After the campaign, we plan to launch a store where your Kickstarter orders will already be integrated. There, you will be able to add any modules to your order according to your preference and arrange for delivery.
Hello guys!
We’ve finished debugging VCA/ringmod schematic and will update mixer module soon!
I had a go at simulating this in Falstad. One peculiarity is the BI mode seems to pass the signal when the gain input is negative. What have I got wrong here? And what’s the value of VR1?
external gain sums with gain knob. And this VCA is bipolar so it is more like ring-modulator. When you put positive gain signal pass in the same phase but if you put negative gain or put knob into the left side in BI mode signal pass inverted.
BTW it is so incredible to see full simulation (I just did it part by part)
