What it does
Stereo reverse delay with feedback.
Illustrating another bizarre twist on the use of a simple digital delay as an audio effect. The input is reversed and added to itself. The length of the reverse buffer corresponds to the delay length. The IIR filter is used to smooth the discontinuities between successive flipped buffers. The effect is enhanced by feeding back the output of the filtered flipped signal back into its own input.
Experiment with the delay and mixer settings to explore the interesting behaviour of this strange combination. Widen the stereo field by adusting the left delay to be different from the right.