Just a quick note: I took a short piece shot on RED and sent the FCP edit into Soundtrack Pro. I found to my dismay that I was unable to apply almost any processing to most of the clips: no noise reduction, no add-on processing (as shown in the image). A bit of investigation followed:

• Clips with one audio channel worked as expected, and accepted all processing.
• Clips with two audio channels worked as expected, and accepted all processing.
• Clips with three audio channels allowed only “Mac OS” processing filters and the “Soundtrack Pro Autofilter”.
• Clips with four audio channels worked as expected, and accepted all processing.

Guess how many channels of audio most of my footage had?

The morals of the story?

• Test your entire workflow on a short before launching off on a feature. This 30-second spot is being done primarily as a testbed, specifically so we can uncover this sort of weirdness before we shoot hours of feature footage.
• Until further notice, avoid recording three channels of RED audio if you’re posting in STP. One, two, or four channels are fine; if you want to post your RED sound in Soundtrack Pro, and you need to record three channels of audio, enable the fourth channel , too.

It’s just one of those crazy things… who knew?