Dionysio Aguado (y Garcia) was a virtuoso guitar player, composer and contemporary of Fernando Sor. Both were influenced by the notation methods of the Italian Federico Moretti. (The Spainish schools preferred the tablature method of guitar notation while Moretti employed staff notation.) The edition of Aguado's "Coleccion de estudios para guitarra" (1820) [Collection of Studies for the Guitar] and "Escuela de guitarra" (1825) [Guitar Methods] to the guitar repertoire can only be understood as a boon to technique and viruosity. His compositions include studies, rondos, dances and fantasias. Aguado and Sor collaborated with one another in concerts even though the former preferred growing his finger nails for picking the strings while the latter advocated the fleshy fingertip. It is thought that Aguado invented the "tripedisono" which is used by guitarists to hold the instrument away from the body. ~ Keith Johnson, Rovi