Damien Chazelle’s testosterone-pumping Whiplash, released last month, is a musical coming-of-age story with the form of a boxing movie; never more so than in a pivotal ‘training montage’ in which the young hero, the talented but arrogant jazz drummer Andrew Neyman (Miles Teller), works to regain his lost first-stringer position. In a move obviously designed to provoke the music student, band conductor Terence Fletcher (J.K. Simmons), who rules his classroom with equal parts terror and humiliation, has replaced the ambitious Andrew with a drummer of lesser ability. Andrew channels his frustration and rage into a gruelling, cymbal-smashing practice session, applying…