“Composer Olga Bell’s last album, 2016’s Tempo, was in part an anthropological study of club culture. She embedded herself in dance nights throughout New York, moving to unfamiliar songs and IDing them with Shazam, and studied online forums to remake herself in the mold of a dance producer. Her new EP, America, is a companion piece to Tempo. Released on the Fourth of July, it picks up where the Tem”