I'm using the Channel EQ in Soundtrack Pro to correct a buzz we have in quite a few interviews. It works great. The parametric EQ's in FCP can't replicate what I'm doing, and the graphic GUI in Soundtrack Pro is great.
The thing is, it's such a pain to roundtrip just to lay in an EQ. Is there any way to use the Soundtrack Pro EQ directly in FCP? Are there any similar audio EQ pluggins that I can purchase that will work in FCP?
The Soundtrack Pro filters are not accessible in FCP. Audio Unit plugins are, with a caveat: no native UI's. Not very intuitive, especially when using a robust plugin. FCP-->>STP-->>FCP is your best option.