I delivered a season of shows last June which required Pro Res files with 1 stereo track and 2 mono tracks of the same (no M&E, just mono print of the same stereo).
I originally created two separate audio clips of the final mix WAV in the timeline - one for the stereo and one for the mono channels.
But it occurred to me that I should be able to use roles to do the same thing as a multitrack Quicktime file. So I tried using just the stereo mix as the only role, and then made three iterations of it in the multitrack export pane:
This worked and gave me a proper 4 channel Pro Res file, but when I listened back in my DAW with a LUFS monitor active, the mono tracks were 3db louder than the stereo, when they should be -3db softer. Has anyone figured out a way to do this? FCP 7 always had an option to lower the mono tracks -3db...
Mac Pro 3 GHz 8-Core Intel Xeon E5, 32 GB Ram, AMD FireProD700
OSX 10.10.5, FCP 10.2.1