● Extract audio directly.
If you have finished video where you’ve applied edits, you can extract the audio as a whole with a few simple clicks. Use the Extract Audio feature to extract audio from video clips and generate new audio master clips in a project. This preserves the original audio of the master clips. Any source channel mappings, gain, speed, duration, and interpret footage adjustments in the original master clips are applied to the new, extracted audio clips.
In the Project panel in Premiere Pro, select one or more clips containing audio. Choose Clip › Audio Options › Extract Audio. Premiere Pro generates new audio files containing the extracted audio and even adds “Extracted” to the end of the filenames.
● Separate the audio from video and export it.
Sometimes you may only want part of the audio from a video, like a live concert recording where you want the music but not all the onstage commentary. In this case, you can unlink the audio from the video and edit the track before you export it.