After normalization, we can't increase the volume on Audio 1 without distorting the audio, so to mix Audio 1 and Audio 2, we'll reduce the volume in Audio 2. However, I want to reduce the volume at the start of scene 2 (where guests arrive), not during the earlier establishing shots. Here's how we'll get that done.
Then move the Current Time Indicator a second or so backwards and click Add/Remove Keyframe again.
Preview and adjust as necessary.
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