Blamsoft XFX Wave is a great source and this piece uses just it put through a variable envelope and two simple delays, one of 2.5 secs and one of 2.7. It is those delays that generate the ratcheting effect in the delay decay.

I was pleased by the variety of moods and potential starting points for ideas that turned up even in six minutes, hence prelude.

I hope you enjoyed it and thank you for listening.