This is granular delay, where the pitch is altered by a randomly triggered note sequencer (feel free to modify the default pattern). The signal is passed through optional 5 and 7.5 second delays (feel free to alter time). These have maximum feedback, so never (?) fade out and allow a drone/loop to build up. The feedback can be faded to zero with Footswitch A to kill the drone/loop. The signal passes some reverse and LPF modules in the chain as well. DSP is pretty much maxed out, but haven’t noticed any glitching audio.