Interesting thought. I’ve never tried to emulate that engine exactly. I do see several ways to approach that in the H90. I’d start with two Presets in a Parallel Routing. Program Mix at 50; Preset A & B Mixes at 100.
For the ‘main’ forward delay in Preset A, you could use most any delay algorithm. Maybe Tape Echo, Bouquet, or Vintage Delay for more of a lo-fi feel. Delay time to taste, with a couple of fading repeats.
The obvious choice for the climbing cascade would be Crystals at octaves up for Preset B . Perhaps offset the reverse delays from those in Preset A, then fold in some Feedback A & B. A touch of Reverb Mix / Decay for diffusion will enhance legato playing.
Despite a more convoluted setup, I might first try Shimmer as Preset B, using Delay & Pitch Decay as the ‘decaying delay’. Finer control over the ‘wash’, and alternatives for freezing the ice solid.
There are other options that have some potential:
- Reverse Reverb in Series Routing with Polyphony
- H910 / H949 in Series Routing with Reverse (delay)
- Ducked Delay in Series Routing with Prism Shift
Each variation is going to have its own ‘charm’ and complement of controls. You just may discover a combination you like even better than the original. When I can, I’ll see what I can come up with on this end. If it’s anything decent, I’ll toss it up on PatchStorage.