Input (grade 11): Elf's self-titled debut album was produced by Deep Purple members Roger Glover and Ian Paice, who happened to see Elf auditioning in 1972.
Output (grade 5): They released their first album, Elf, in 1972. The album was co-produced by Ian Paice and Roger Glover, who would later work with Elf's lead singer Ronnie James Dio in the band Rainbow.