There's numerous question on here about favourite examples of sound usage in a film, but what's everyone's favourite film about sound? I know it's a limited genre, but worthwhile compiling a list for everyone to draw from!
Last week, I got the opportunity to go to the premiere here in Dublin of the film Silence by Pat Collins. It's a docu-drama of sorts, about a sound recordist returning home to Ireland to record natural ambiance away from any man made noise.
It is hauntingly beautiful, with amazing cinematography and a wonderfully philosophical meditation on silence and the effect it has on people.
Site here: http://silencefilm.ie/