With his indestructible riffage, swift Afro-Latin rhythms, and cool lowrider funk, Carlos Santana has been revolutionizing Latin rock since the Woodstock era. The Shadows' surf pop and Ritchie Valens' Chicano rock 'n' roll inform the guitar guru's eclectic, acid-fueled compositions; his piercing yet slithering fretwork echoes both Django Reinhardt's woozy gypsy jazz and the down 'n' dirty blues of B.B. King.