Save for “Woman From Tokyo,” Who Do We Think We Are is not one of Deep Purple’s most popular LPs with fans or critics, who comment on the effects of the band’s discord in their recordings.

Another hit in “ Woman from Tokyo ” followed as Purple morphed further toward what would become known as heavy metal.

Happy 80th Birthday to Ian Gillan (born 8/19/45), one of rock’s most defining voices and the longtime frontman of Deep Purple ...