Sean Costello tipsade om detta på twitter: https://twitter.com/valhalladsp/stat...906233348?s=20
It turns out that ValhallaSupermassive works just great for infinite/"freeze" reverbs.
Not sure why I am only figuring this out now. I mean, I wrote the darned thing.
Start with the default settings, set Warp to 60%, feedback to 100%, density to 100%. Instant infinite reverb.
You might want to turn down the Mod Rate / Depth, so that the pitch is preserved for holding the note for a really long time.
OK, the Supermassive reverb has been going for half an hour now. No loss in signal level.
It will probably sound weird in several hours or days, but it is "infinite" enough for most practical purposes.