You’ll probably export it to some sort of 10 bit uncompressed flavor of FCP quicktime. Ask the post house what they prefer. Rather than using quicktime conversion, create a new sequence in the format you’re delivering in and copy and past you video into the new sequence. That way you can take a look at how it renders and make any adjustments if you need to.
There is a “broadcast safe” filter in the color correction folder, but I wouldn’t recommend it. Open up the video scope tool and get it as close as you can. Then ask the post house doing the master to fine tune it as they need to.
There is bars and tone in FCP. You’ll just need to set the tone to -20 since you’re going to digibeta.
-12 seems a little low for your audio levels. Depending on the place I’ve mastered closer to -8 or -10.
I’d recommend setting up a FCP project for you post house to use rather than just a self contained quicktime. That way you can set up the time line with you self contained qt on video 1, a wav or aif of your music and voice on 1&2 and a wav or aif of your music and fx on 3&4. You’re post house will have to route tacks 3&4 from your timeline to the digibeta by right clicking on the speaker icon on your timeline and choosing “audio outputs” and selecting 3&4. Typically, I have master a full mix on 1&2 and music and fx on 3&4. Are you sure about your specs?
Good Luck!
JC