Capture audio from movie being played back

  • Greetings

    So my company has asked me to make one of the videos of 30 people all singing together.  Those that work in my field have used either Logic Pro X or Adobe software to complete this goal.  For fun I decided to try it in Isadora.  I am using 2.6.1 at the moment.

    What I have been successful in is capturing the video part by using "capture stage to movie" actor.  And I have been having fun with that.  But what I can't figure out is how to make Isadora capture the audio from these movies.   To be fair I have never used "Live Capture" before. But I did figure out how to capture me and the things I have said.  But what I have not been able to do is figure out how to get the capture to take the audio from the movie and not from my mic.

    the questions are:

    is there a way to make this happen? and I have searched for 3 days on the internet and either I don't know the right word to search with.

    Is this pointless in Isadora and should I just go back to Adobe?