In the early '60s, before a stretch in prison put his career on pause and he found success as a country artist after regaining his freedom, Freddy Fender was a Spanish-singing rock & roll sensation throughout Texas and Mexico, and the Interpreta el Rock album captures the sound of Fender (still trading sometimes as Baldemar Huerta) ripping it up on a dozen originals and covers. Since Arhoolie's 2003 reissue of the album doesn't include any songwriting credits, sometimes it's a bit hard to tell which is which -- "Vamos a Bailar" sure sounds like Ray Charles