Sarzo recalled listening to the final mixes of those songs and being appalled at how sloppy his playing was on those three tracks, as they had only run through them a couple of times in rehearsal. As the band, minus Osbourne, flew back to Los Angeles on September 28 after completing the shows, Gillis played them the demo recordings he had made with Night Ranger that would comprise the band's soon-to-be released debut album, while Sarzo played them the new Quiet Riot recordings he had been working on in secret. Upon arriving in Los Angeles, Sarzo promptly quit Osbourne's band and officially rejoined Quiet Riot, prompting a long and bitter feud with Osbourne that would culminate in the vocalist assaulting him backstage at the US Festival in 1983. Gillis also left Osbourne's band shortly thereafter, returning to Night Ranger weeks later. "Speak of the Devil" represents the only official Osbourne recording to feature the guitarist's work. Album producer Max Norman stated in 2007 that due to a limited budget, he had Osbourne and the band perform an entire extra show with no audience in the afternoon of either the 26th or 27th of September. Norman recorded that performance in the event that the actual live shows were not of suitable quality for release. "At least we've got a choice and we'll have more material to draw from", he said of this decision. According to Norman, the finished album features three songs from that performance with crowd noise later added in post-production. Though Norman did not specifically identify which tracks he was referring to, he said "If you got nothing to do for a couple of days you could just lie there and listen to them in the headphones and figure out which songs had the real audience and which ones didn't." Soundboard recordings of both performances, which exist as bootleg recordings, seem to prove that all tracks appearing on the album with the exception of "Sabbath Bloody Sabbath" were taken from the 27 September show. "Sabbath Bloody Sabbath" was not played at either of the Ritz concerts and the recorded version included on "Speak of the Devil" is believed to have come from the afternoon recording referenced by Norman. A double album, "Speak of the Devil" represents the fulfillment of a contractual obligation, as Osbourne owed Jet Records two more records. Though the album has long been a fan favorite, Osbourne himself has publicly renounced "Speak of the Devil", stating that it was only released to satisfy a contractual obligation.