This is based on David Gilmour Echo settings on the Fillmore West live show. Not exactly that sound tho, I like so much the excess of echo on the vocals in that show so I used an high level of the repeats. There is also a blended rotary to soften a little the dry sound.
It’s just perfect with vintage single coil instruments and clean loud amps. Pushing button B the feedback goes to infinite for a flying self oscillation