From what I have seen, many editors shy away from using Soundtrack Pro 2, as they feel that they have the same tools in Final Cut Pro, and it's one less step they have to go through, by mixing in their editing timeline. Let me say, if you think this way, you are missing out on one of the best “not so hidden” features of Soundtrack Pro 2, and that is Automation Mixing (AM). AM used to be reserved for the sound engineers who had mixing consoles hooked up to their Mac's, but not any more. You can use this excellent advanced technique for not only regular mixing, but 5.1 surround mixing as well.