i am sure that anyone that is a Foo Fighters fan already knows about this, but in case someone is reading this and hasn't watched. The documentary "Sound City" is one the BEST music documentaries I have ever seen, and it isn't even about a musical act, it's about a soundboard. Grohl & Co, give the history of it, then he sets out to save this soundboard so it can continue to be used to record music. Pretty cool movie.