Michael C here from Serious Film.
The opening moments of Paul Thomas Anderson's Punch-Drunk Love feature a prolonged stretch of silence broken by the crash of a truck doing flips down the street. In most movies this would be the cheapest trick in the book, giving the audience a jolt by hitting them with a loud noise out of nowhere. It doesn't feel that way here. The sound design in this scene, as in the rest of the movie, is wired to the off-kilter psyche of Adam Sandler's Barry Egan. He too harbors the constant threat of sudden violence under an ocean of surface calm.
The sound work on Punch-Drunk Love is a study in discomfort. It's not just a case of Jon Brion delivering yet another brilliantly original score, though there is no question he does that. It's the fact that the score doesn't behave according to any of the rules audiences have been trained to expect from years of movie watching. Punch's score comes and goes at right angles to the material, sneaking in unnoticed only to drop out suddenly giving the viewer a cold splash of silence.
In the early sequence when Barry is hounded by incessant, abusive phone calls from his seven sisters, the sound mix works with them as a team to drive Barry over the edge. The twitching, relentless score is layered over top, ratcheted up until it competes with the dialogue, so that we are having as hard a time focusing on work as Barry. The tension mounts steadily as the score gives way to the sound of his sisters' chatter. The wall of sound builds until Barry is forced to smash a glass door to get a few precious moments of peace. With barely any exposition we know all we need to know about Barry and his rage and repression issues. The sound design is as big a part of the story as the dialogue.
The sound design of Punch-Drunk Love incorporates all the story's elements into a seamless piece, from the gentle sliding motif of the harmonium through the sickeningly matter-of-fact realism of the violence. We feel like we know what Sandler is thinking or feeling at any given moment, since, whether we register it consciously or not, the sound has given us a map of Barry Egan's mind. It accomplishes without words what most other movies require a voice-over narration to do.