Though his career included early flirtations with bubblegum and glam, Giorgio Moroder is best known as one of disco music's principal architects. In the '70s, with Donna Summer and Pete Bellotte, he crafted a sexy, fantastical version of disco defined by 1975's Love to Love You Baby and its hugely popular title track, plus other hits including 1977's "I Feel Love" and the following year's "Last Dance." As the disco era faded, Moroder translated his futuristic sound into highly distinctive film scores such as 1978's Oscar-winning Midnight Express and 1984's Flashdance and Metro...