 In 1977 , de Lucía married Casilda Varela , the daughter of General Varela ; they had three children . He released his final album , Castillo de Arena with Camarón de la Isla , The lyrics were written by Antonio Sánchez , with the exception of the bulerías Samara , which Sánchez and de la Isla wrote together . This would be his last LP with a singer for at least 15 years . He reportedly said that the human voice is " naturally too limited " and that he prefers the exploration of different instrumentalists ; he also said a busy schedule was the reason for lack of recordings with singers . He performed extensively across the US and Europe during this period , increasing his popularity outside Spain and the flamenco community in Europe , and met many jazz , Latin and other musicians who continued to influence de Lucía 's evolution as a " Nuevo flamenco " player . He began to show a very keen interest in jazz fusion and rock , and in 1977 performed with Carlos Santana in the Plaza de toros de las Arenas bullring in Barcelona . He was invited by Al Di Meola to record on his " Mediterranean Sundance " piece for his album Elegant Gypsy . Despite considerable new interest in flamenco and de Lucía 's playing generated by the album , traditionalist flamenco critics did not approve of the piece and hated that many people considered Mediterranean Sundance flamenco music and frowned upon de Lucía . Di Meola informed the critics not to worry and that " Paco is not leaving flamenco , but expanding it . " In 1978 , Paco and his brothers recorded Interpreta a Manuel de Falla , a classical effort of compositions by Manuel de Falla . 
