Featuring a four-knob layout of delay, distortion, tone and volume which reacts organically to playing intensity for authentic tweed breakup tone, the Mad Professor Bluebird pairs boutique overdrive and delay effects in one chassis. Conceived as a union between the company's two most popular pedals, the Sky Blue Overdrive and Deep Blue Delay, the warmth and presence inherent in the Bluebird make it a perfect candidate for nailing classic rock tones or adding texture for garage and psychedelia.