After early study along with his father, composer and organist Joaquin Cassadó, Gaspar attended the Barcelona Conservatory and in addition took lessons from Casals. He loved an international profession, using such greats as Bauer, Rubenstein and Menuhin. He was referred to as a processed player with gorgeous tone and solid technique. Cassadó made up several concertos and far chamber music. His function was affected by Falla and Ravel.