"Since I've Been Loving You" is a song by the English rock band Led Zeppelin, released in 1970 on the album Led Zeppelin III. This was one of the first songs prepared for the Led Zeppelin III album. The song was recorded live in the studio with very little overdubbing. It was reportedly the hardest to record. Audio engineer Terry Manning called it "The best rock guitar solo of all time."John Paul Jones played Hammond organ on the song, using the bass pedals for the bassline.