The KkImaginationMachine Sound. This is a Sound we started working on in the Kata in 2019.
What is the KkImaginationMachine? That would be telling...
...basically it's a frequency shifter inside a delay feedback loop with a couple of filters. The Sounds own description says:
Hilbert single sideband ring modulator with feedback with optional negative/positive frequency killer.
- by the Kyma Kata group