The Notorious Byrd Brothers is the fifth album by the American rock band the Byrds, and was released in January 1968, on Columbia Records. The album represents the pinnacle of the Byrds' late-‘60s musical experimentation, with the band blending together elements of psychedelia, folk rock, country, electronic music, baroque pop, and jazz. With producer Gary Usher, they made extensive use of a number of studio effects and production techniques, including phasing, flanging, and spatial panning. The Byrds also introduced the sound of the pedal steel guitar and the Moog modular synthesizer into their music, making it one of the first LP releases on which the Moog appears.