Orchestras which choose not to have principal conductors, such as the Orchestra of the Age of Enlightenment, Saint Paul Chamber Orchestra and the Vienna Philharmonic Orchestra, are omitted from this list. Likewise, principal conductors for opera companies are omitted, unless the orchestra of that opera company performs orchestral concerts under ...

Concerto for Group and Orchestra is a live album by Deep Purple and the Royal Philharmonic Orchestra conducted by Malcolm Arnold, recorded at the Royal Albert Hall, London, in September 1969.It consists of a concerto composed by Jon Lord, with lyrics written by Ian Gillan.This is the first full length album to feature Ian Gillan on vocals and Roger Glover on bass.