Professor at the Conservatoire de Paris and classical saxophonist. He took Marcel Mule's esteemed teaching position when Mule retired.
He began to learn saxophone at the age of twelve and attended the Conservatoire de Paris where he won many awards.
He played with the Berlin Philharmonic Orchestra for two decades.
He was born in Paris, France.
Deffayet performed as a saxophonist under the direction of Seiji Ozawa.