John Talabot (9:00 PM Saturday, El Chupacabra Stage): If the Barcelona producer, John Talabot’s house music is tropical (as it’s often called) it’s in the same way that a rainforest at night is tropical. Dark, hot, dense, mysterious and on tracks like “El Oeste,” just a little bit unsettling. Talabot creates songs that surround and overwhelm. Check out his set — you will never hear a croaking frog the same way again.