 In June 1968 Los Ángeles Negros won La Discusión radio station 's competition , in which they competed against a band named Los Cangrejo , and received the opportunity to record a single in Sello Indis , an independent label owned by pianist Raúl Lara . They recorded " Porque Te Quiero " / " Día Sin Sol " , which was released by Indis as a single . 
