He studied with Spanish classical guitarist Alberto Ponce[2] and with Désiré Dondeyne.
[2][4] Dyens released several volumes of arrangements that included not only the classical music of Fernando Sor but also the Brazilian music of Heitor Villa-Lobos, jazz standards by Thelonious Monk, the French pop of Edith Piaf, and the Gypsy jazz of Django Reinhardt.
[4] Tango en Skaï (1985), is one of his best-known pieces, but also widely played is the more extended Libra Sonatine (1986) written in three movements: "India", "Largo", "Fuoco", composed after Dyens had heart surgery.
"Its three movements are an explicit portrayal of that very particular period of my life: first the chaotic India (before the operation), then the Largo (during it) and finally the Fuoco, in which the unrestrained rhythms depict a veritable incarnation of my return to life (and several guitarists often play this last movement as an independent piece)" quotes Dyens.
He taught at Conservatoire National Supérieur de Musique in the position held by his teacher, Alberto Ponce.