Final Cut Pro: Copy and Paste Audio Levels From A1 to A2 in the Same Clip
I dragged a clip to the Timeline. I have set some audio level keyframes in Audio Channel 1 (A1) of the clip. If I Copy Attributes from A1 and Paste Attributes into A2 in the same clip, nothing happens.
This situation can occur if you are pasting audio levels from one channel of audio in one clip to another channel of audio in the same slip, if you have not opened the clip in the Viewer at some point.
If you have dragged a clip that has Channel 1 plus Channel 2 audio directly from the Finder to the Timeline, or from the Browser to the Timeline, open the clip in the viewer at least once to enable Paste Attributes.