Michael Flores' pulsing brand of Spanish rock thrives on complex, unpredictable arrangements. Wailing guitar licks, heartfelt vocals, crashing drums and a dash of flamenco intermingle for an edgy, alt-rock sound. Despite the innovative mix, the heart of Flores' sound is steeped in tradition. Flores, who has spent his career singing and recording in English, released his first Spanish-language disc, Sangre del Tigre (Blood of the Tiger), in late 2005. He considers it his first "official" album, and he dedicated it to his grandparents.