the deery – a quad vactrol vca By david kay | March 7, 2019 this is the deery – a simple but very useful quad vactrol vca – 4 cv-able channels – thats it… 1 3 4 2 Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to email a link to a friend (Opens in new window)Like this:Like Loading...