Entering Riz Ahmed in the disability cosplay sweepstakes as a young drummer coping with hearing loss, Darius Marder’s Sound of Metal originated as a lightly meta vehicle for husband-and-wife sludge-metal duo Jucifer to be directed by Derek Cianfrance, with whom Marder co-wrote The Place Beyond the Pines (2012). That the final result is more surprising than the rote uplift narrative suggested by its edifying logline is a testament to both Ahmed’s cagey intensity...