While "tracking" the Byrds' first single, "Mr. Tambourine Man", at Columbia studios, McGuinn discovered an important component of his style. "The 'Ric' [12 string Rickenbacker guitar] by itself is kind of thuddy," he notes. "It doesn't ring. But if you add a compressor, you get that long sustain. To be honest, I found this by accident. The engineer, Ray Gerhardt, would run compressors on everything to protect his precious equipment from loud rock and roll. He compressed the heck out of my 12-string, and it sounded so great we decided to use two tube compressors (likely Teletronix LA-2As) in series, and then go directly into the board. That's how I got my 'jingle-jangle' tone. It's really squashed down, but it jumps out from the radio. With compression, I found I could hold a note for three or four seconds, and sound more like a wind instrument. Later, this led me to emulate John Coltrane's saxophone on "Eight Miles High". Without compression, I couldn't have sustained the riff's first note. "
Roger McGuinn / m ə ˈ ɡ w ɪ n / ( James Roger McGuinn , born James Joseph McGuinn III ; July 13, 1942)  is an American musician. He is best known for being the frontman of the Byrds . He was inducted into the Rock and Roll Hall of Fame for his work with the Byrds.