http://www.buyanalogman.com The ARDX-20 dual delay from Analog Man demoed with a Boss Volume pedal FV-50H as the expression pedal. Very cool delay, with extra options for those who really know how to utilize their delays...I am not that person, but can tell you it's an amazing SOUNDING delay, and hey, there's two of em' in one pedal! Gotta love Analog-Man. I used a Gibson Historic Les Paul 59, and a Fender blues junior amplifier.