Marr's jangly guitar-playing was influenced by Roger McGuinn of the Byrds, Neil Young's work with Crazy Horse, George Harrison (with the Beatles), James Honeyman-Scott of the Pretenders and Bert Jansch of Pentangle. Marr often used a capo to tune his guitar up a full step to F-sharp to accommodate Morrissey's vocal range, and also used open tunings. Citing producer Phil Spector as an influence, Marr said, "I like the idea of records, even those with plenty of space, that sound 'symphonic'. I like the idea of all the players merging into one atmosphere". Marr's other favourite guitarists are James Williamson of the Stooges, Rory Gallagher, Pete Townshend of the Who, Jimi Hendrix, Marc Bolan of T. Rex, Keith Richards of the Rolling Stones and John McGeoch of Magazine and Siouxsie and the Banshees. In a 2007 interview for the BBC, Marr reported that with the Smiths his goal was to "pare down" his style and avoid rock guitar clichés. Marr forbade himself from using power chords, distortion, lengthy solos, or "big rock chord changes", instead relying on sophisticated arpeggios to create his signature chiming guitar work for the band. Although occasionally Marr would disobey his own rules and create more of a punk feel with songs like "London".