A regular delay tracking at 1V/oct accidentally is probably really unlikely. Apparently there's a lot of math involved for those companies who are willing to grit their teeth over it. The Proton looks like the way to go if you really need it.
My only other experience with delay in euro was with the Synthrotek DLY. I didn't really like how the DLY responded, and sent it back after about a week.
Anyways, if I can, I'll test one out soon and see if I have different results than what has already been posted.
That would be surprising. DSI confirmed the behavior I experienced as expected operation, so if you get one that tracks with the filter open, there'd be bemusement all 'round.
So what am I using it for? It turns out that it's really versatile.
(1) Sequenced rhythms, in a couple different ways (with and without the triggered noise source)
(2) Faux reverb (providing a sense of space)
(3) Bell-like patches that sound more natural than ring-modulated sounds
(4) Accents with simulated struck surfaces
I've figured out that I can record video to QuickTime with my iPhone while recording audio with my audio interface, so tomorrow I'm going to start a series of videos each demonstrating a specific aspect of the DSM03. The first one will be a sequenced rhythm technique involving simultaneous modulation of Time and Cutoff Frequency. The variety from just those two controls plus modulation is substantial.