At the heart of In Search of Lost Time is found one of the most fascinating musical enigmas in literature: what music, capable of procuring emotions of incredible intensity, is hidden behind “Vinteuil’s Sonata”? Here, the supposed model for the latter, Saint-SaĆ«ns’s Sonata No.1, is heard alongside other pieces, which wreathe the mystery of the imaginary sonata in a thousand reveries that can give rise to a journey in Proust’s universe.