In a live edition of The Listening Service, Tom Service hears and responds to composer Olivier Messiaen’s ‘Interstellar Call’, sent out in his epic "From the canyons to the stars..." The music is inspired by the wild beauty of Arizona, filled with birdsong and the sounds of nature, but also with a cosmic sense of awe - where does Messiaen's visionary work fit in the culture of the early 70s and in the present day?