mapping audio channels on multicam clips

Question

I am syncing three cameras, all of which recorded 5 channels of sound, with two channels of audio recorded by the on-set sound mixer (one lav, one boom). In the multicam clips, I believe the editor/director only wants the two channels recorded by the on-set sound mixer.

For whatever reason, Premiere made the multicam clips with audio mapped to different # of channels: some to 5 Mono, some to 3 Mono, some to 2 Mono.

Should I Modify all the multicam clips so they're mapped only to 2 channels of audio? When I cut one with 5 channel mono into a sequence, it brings in 3 silent channels. It won't cause problems when it comes time to deliver to our color vendor, will it? (ex. in a way similar to how proxies can only be attached if the audio mapping matches)

Is there a way to "map" audio for poly WAV clips (where the on-set sound mixer has a separate channel for each person's lavalier, etc..)? I noticed that if I map something to "Channel 3", I can't hear it on headphones (is this mapping it to a surround sound channel?).

KazuTa · Accepted Answer

To ensure the right channel from the B-cam is included, follow these steps based on the screenshots you provided:

In the Project panel, select the multi-camera sequences.
Go to Clip > Modify > Audio Channels (or press Shift + G).
Set the Number of Audio Clips to 4.

Note: This will not update any edits already placed in a timeline. Those clips will need to be replaced with the updated multi-camera sequences.

In this instance, to ensure proper AAF export, you’ll need to flatten the multi-camera sequences before sending them.

Whew, that's WAY easier than what I was thinking! So, I only have to select the multicam clip and right-click / Modify # of audio channels to 4 Mono. Here's the multicam clip Open in Timeline (I changed the # of audio channels in the Track Mixer to 4 also):

Then, when I cut it into a sequence, the two channels of Cam B sound (on A3 above) will show up as A3 & A4, below:

How does one flatten multicams before exporting an AAF? Simplify Sequence?

PaulMurphy · Answer

If you’re creating a multicam sequence and want to use only your separate audio files (like external recordings) without including the audio from your camera media, make sure to set the Audio Sequence Settings to Camera 1 in the Create Multi-Camera Source Sequence window.

For a helpful breakdown of how Premiere Pro handles audio channels and their layout in multicam sequences, check out this video: https://youtu.be/M89zzmK_qcc.

If you’ve already created your multicam sequence and need to adjust the audio channel configuration, you can do this without starting over:

In the Project panel, select your multicam sequences.
Go to Clip > Modify > Audio Channels.
Here, you can set the Clip Channel Format, Number of Audio Clips, and choose which channels to include. Based on your example, you want to:
- Set Clip Channel Format to Mono.
- Set Number of Audio Clips to 2.
- Tick the columns corresponding to your external audio tracks (these columns match the audio tracks in your multicam sequence).

If you’re having trouble hearing audio beyond channels 1 and 2, it’s likely because you’re monitoring one channel per speaker. To monitor all channels, hold Shift and click the “bow ties” icon at the bottom of the Audio Meters.

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