That instruction precedes The Last Waltz, a concert movie documenting the star-studded swan song of The Band. It’s good advice. You can’t fully appreciate the crackle of Robbie Robertson’s guitar or the wallop of drummer Levon Helm with the sound down low. Same goes for the guest singers. The growl of Muddy Waters, the moan of Emmylou Harris and the yawp of Dylan all benefit from volume.