
During the tour, Deep Purple showed a remarkable progress as performers and a musical direction more oriented towards a heavier and louder sound than before. The band started their second US tour in April 1969 with little support from their almost-bankrupt American label and without an album to promote, because of a delay in the manufacturing of the new LP. This was due both to the growth of guitarist Ritchie Blackmore as a songwriter and to the conflicts within the band over the fusion of classical music and rock proposed by keyboard player Jon Lord and amply implemented in the band's previous releases. The music of this album is mostly original and a combination of progressive rock, hard rock and psychedelic rock, but with a harder edge and with the guitar parts in more evidence than in the past. Its release was preceded by the single "Emmaretta" and by a long tour in the UK, whose dates were interspersed between the album's recording sessions.

Deep Purple, also referred to as Deep Purple III, is the third studio album by the English rock band Deep Purple, released in June 1969 on Tetragrammaton Records in the United States and only in September 1969 on Harvest Records in the United Kingdom.
