Bertrand Chamayou, who won Gramophone's Recording of the Year in 2019 for his Erato album of two Saint-Saëns piano concertos, has turned his attention to two groundbreaking composers. John Cage was a great admirer of the music and aesthetic experiments of the Frenchman, Erik Satie - and Chamayou has created a programme for Erato that links the two, 'Letter(s) to Erik Satie'. James Jolly caught up with Bertrand Chamayou at his Festival Ravel in St Jean de Luz in south-west France this summer to talk about the project.