I created a pair of movies on using the Happy Nerding 3x VCA: three linear VCAs with bipolar attenuators (“attenuverters”) and offset controls as well as internal mixing in just 6 hp of space. The first movie focuses on using VCAs for normal enveloped amplitude duties, as well as voltage-controlled mixing in a performance context:
For more details about using the 3x VCA (including the second movie in the series, which is exclusive to my Patreon supporters), I encourage you to join the Learning Modular Patreon Tribe. For more on the Learning Modular Synthesis Eurorack Expansion Project for those exploring what module to add to their system next, click here.