Or am I destined for a life of using rack units and plugins for this?
I have a Analogman ARDX20 with AMAZEO on its way and from what I've read the AMAZEO controller reads in ms. It has knobs to adjust the various perimeters so I don't know if it's what you're looking for or if you wanted to be able to actually type in the numbers?
Came in to post this.TC Nova Delay