An hour in the company of music writer James Gavin whose biographies include George Michael, Chet Baker and Peggy Lee. Gavin discusses ‘ravaged’ voices;  singers whose voices became utterly wrecked in old age like Billie Holiday and Alessandro Moreschi. Or in the case of Marianne Faithful where age wearied the voice in a new and haunting way. We hear high voices that never dropped like Jimmy Scott and Peter Pears and Joan Baez whose technique only improved with age. And not forgetting the drama that became the hallmark of Johnny Cash’s late singing.