PDF (adobe.com)

Mix audio when pasting

The Mix Paste command lets you mix audio from the clipboard with the current waveform.

  1. In the Editor panel, place the current-time indicator  where you want to start mixing audio. Or, select the audio you want to replace.
  2. Choose Edit > Mix Paste.
  3. Drag the sliders for Copied Audio and Existing Audio to adjust the ratio of each.
  4. Click Preview, and adjust the sliders as needed.
  5. Click OK to apply your changes.