Christian Gerhaher and pianist Gerold Huber have embarked on a Schumann Lieder project; the first volume 'Frage' is just out and combines groups of songs – or song-cycles as Gerhaher argues – from 1840 and 1850 and includes the Kerner-Lieder. Gramophone's Editor-in-Chief James Jolly caught up with the baritone for our latest podcast.