Available as an assembled Module and as a DIY project.
This Module is currently available.
2-channel 3-input Unity Gain Mixer
The 3to1 module is a utility 2-channel precision adder/unity gain mixer.
This module is perfect for combining accurately 3 CVs into one.
https://www.davidhaillant.com/category/electronic-projects/utility-modules/3to1-precision-adder/
