"The Rain Song (Mix Minus Piano)" strips John Paul Jones' piano from the tune, allowing the guitar and vocal to breathe. "The Rain Song" is the sort of piece of music that Led Zeppelin could approach and do so successfully and so masterfully," said Jimmy Page. "This whole genre of the sensitivity, where it can sort of caress you, it's something that I've always been very proud of. The companion disc version is really a good blend of everything that's actually being played."

Released in March of 1973, "Houses Of The Holy" features legendary tracks such as "The Song Remains The Same" and "No Quarter" while also showcasing the continuing evolution of the band's signature sound with the reggae-tinged "D'yer Mak'er" and the funk jam "The Crunge". The album has been certified diamond by the RIAA for sales of over 11 million copies.

The seven unreleased tracks on the companion audio disc include rough and working mixes for "The Ocean" and "Dancing Days" that reveal a deeper look inside the recording sessions of these classic songs. Other standout recordings include the guitar mix backing track for "Over The Hills And Far Away" and a version of "The Rain Song" without piano.