Electronic Audio Experiments Prismatic Wall Sympathetic String Resonator Effect PedalElectronic Audio Experiences reaches through the proverbial fourth wall right into our hearts with their Prismatic Wall pedal. This particular effect, a "sympathetic resonator," balances many different points of design and sound, creating an otherworldly fusion of sensations you won't find anywhere else. Inspired by a reverb effect created by mic'ing the strings of a grand piano in a room full of amps, the Prismatic Wall is a new resonator effect