Thanks! It was sort of a single take ā I recorded a loop in W/ first, let it keep playing, then switched Plaits algorithms, set up everything else including most of the effects, and recorded a take.
There was some editing afterwards in Sound Forge ā it originally went on longer, but I cut it off and washed it out in reverb at the new ending. And I grabbed the āpopā sound, processed it some and pasted it back in at each repetition.