Mulet's most notable works are for organ: the Esquisses byzantines (1914-1919) and the Carillon-Sortie (1911/12). The former, a set of ten pieces, was a recollection of the Romano-Byzantine architectural style of Sacré-Cœur and five of the pieces are named after some of its features, including "Campanile" (bell-tower) and "Chapelle des Morts" (chapel of the dead). The Carillon has been called "one of the great showpieces of French Romantic organ music".[2] Mulet's complete organ works were recorded in a set of two CDs in 1989, played by Paul Derett.[3]
In 1922 Mulet published "Les tendances et antireligieuses néfastes de l'orgue moderne", an attack on modern schools of organ building; this was followed by similar essays. He deplored the trend to create organs which he felt were more appropriate for the cinema than for church: the organ was "a stained-glass window. Its tones of imposing and embracing calm flood the air of our cathedrals, in the same way that ...stained-glass windows bring down meditation upon the congregation."[2]
In 1937, Mulet, following a financial crisis, destroyed his manuscripts and many of his possessions and left Paris for Draguignan (Var). There he continued as a church organist until 1958, often in poverty (his wife opened a toy-shop in the hope of increasing their income). Ill-health led Mulet and his wife, Isabelle-Emilie-Marie (née Rochereau) to retire to a convent in Draguignan, where he died in 1967.[1][2][4]
