Rooted in the symphonic art of the 19th century and clearly not terribly eager to adopt contemporary musical trends, Henri Mulet saw things on no less of a grand scale at the time, even composing for orchestra. He conducted at the Société Nationale, including the first performances of his works, all prior to the Great War. A few pieces of sacred music and songs with piano also appear in his catalogue, as well as for voice and orchestra, but his works for organ are the best-known part of his output.

By the richness and scope of the cycle, the complexity of writing and instrumental demands, the Esquisses Byzantines - 10 Pieces for great organ - naturally remain his masterpiece.

Played on the organ of Notre-Dame de la Dalbade, Toulouse.