The Yardbirds are an English rock band formed in London in 1963 that had a string of hits during the mid-1960s, including "For Your Love", "Heart Full of Soul" and "Over Under Sideways Down". The group launched the careers of guitarists Eric Clapton, Jimmy Page and Jeff Beck. A blues-based band that broadened its range into pop and rock, the Yardbirds contributed to many electric guitar innovations of the mid-1960s, such as feedback, "fuzztone" distortion and improved amplification. After the Yardbirds broke up in 1968, lead guitarist Jimmy Page founded what became Led Zeppelin, while vocalist and harmonica player Keith Relf and drummer Jim McCarty formed the symphonic rock group Renaissance.