Sync connected clip audio to audio on timeline?

Hey!

I have a multiclip containing 2 camera angles from a live performance. I also have an audio file of the music. If I put the audio file into the multicam I can sync it (the audio is the same). But as far as I know I can then only have the audio from one angle at the time playing. I'd like at least two of the angles audio to be audible.

Or if it's possible to automativally sync them when the audio file is connected? Usually It's possible to do by eye but this time because the live audio (well, playback but you get the idea) was rather low so the audience sounds are too loud to get good view of waveform to visually sync them...

You can have multiple audio clips playing at the same time in a multicam clip.