"Friends" is an acoustic track that uses a C6 tuning on guitar. Page explained: "I played a Harmony acoustic tuned to C–A–C–G–C–E on 'Friends'... It's a C tuning, but not a [typical C tuning. I made it up." The song includes a string section arranged by Jones, which Page had wanted to achieve an Indian style of sound. The song was re-recorded as an experimental arrangement with the Bombay Orchestra in March 1972, along with "Four Sticks" from the following untitled album, commonly known as "Led Zeppelin IV" (1971). That arrangement appeared on the 2015 reissue of the retrospective album "Coda". The song segues into "Celebration Day" via a Moog synthesiser drone.