How to enable "Voice Isolation" in Final Cut Pro 11 for a multicam edit on Mac Studio?

Dear Tom (our eternal helper), So good to hear from you again.

That worked! Thank you. You lowered my stress level!

Tom, on a different issue, if I leave Final Cut on for a while, but don't activate it, it freezes up. Sometimes it does it while I am working in it. Do you have a thought about why and how to avoid this happening? With thanks as always, Duncan

Tom, I need to back up here. After leaving the problem clilp and then returning to it, I tried the steps you outlined and which worked before. But now all that I can get to open under Audio Enhancements are 1) Audio analysis, 2) Pan, and 2) Mode.

What am I doing wrong? Thanks, Duncan

Tom, BenB (thanks for the screenshot) and Luis, First of all, thank you for your willingness to help me. I'll try to add two screenshots here: 1) the multicam timeline spot I want to try Voice Isolation on, and 2) the angle then activated in the Angle Editor.

But when I move my cursor next to "Audio Enhancements and open "Show", It still won't show me Voice Isolation. There must be something I'm doing wrong.

Thank you, Duncan

Luis, that makes a lot of sense to me. That kind of implies that "Voice Isolation" is built on being able to screen out one stereo track and raise the other as need be. That would seem to be different than the concept of being able to isolate all sound that is not human voice and let one work with the track that is voice.

I guess I'll have to go forward on that assumption and not be able to use Voice Isolation. Thanks so much for digging into this for me. Best wishes, Duncan

Thank you, Tom.

That must be the core problem. I'll select a single channel as Ben indicated.

Thanks to all for your helpful advice!

Duncan