Wow. Holy shit. That was like Full Metal Jacket: The Musical. J.K. Simmons is electric as a hard-ass Jazz band conductor and, while I didn't like his character, Miles Teller really puts it all out there as his ambitious, young student.
Kind of like John Wick, if John Wick were Amish and couldn't drive. Or shoot. Or fight, really. Not sure what the point was of the main character not being able to speak, aside from giving more lines to Paul Rudd, who makes this movie slightly bearable.