This is close to how I recorded my track, Timothy G Taylor ‘Dreams of Organization’…
It was a dry run of improvisational tape loop style music set I’m trying to put together. The underlying “drone” voice is a Morphagene sampling who knows what. The main voice is a Mother 32 played on a midi keyboard. I run the M32 into the top section of a Cold Mac for panning, the stereo outs each going into their own W/ which have loops set up in different lengths. A slow triangle LFO is patched to cold Mac survey. Sounds like the W/s are running in reverse. I mult a +/- 5v offset from Maths to each of the W/ to control feedback level and work this knob throughout.
In the later sections I turn the VCA of M32 on, turn the filter down and then use the LFO to open the filter up. I patch the square wave of the LFO into the LFO rate which changes the triangle wave into a saw, essentially emulating a Decay envelope. I spend a while slowly messing around with different drone notes, the LFO speed knob, filter settings on the M32. Building up and tearing down through the W//.
There may be more happening, but this is the basic idea. I regret not capturing the patch on video.