Stereo to Mono - Premiere Pro
From Help Wiki
If you have a stereo audio file or a stereo audio track in a video file and you only want to use the left or right channel Premiere Pro has multiple ways of accomplishing this.
A common a example would be a stereo file with audio on the left channel and silence on the right channel.
Effects
- The Fill from Left or Fill form Right audio effects can be used to duplicate the audio from one channel to another.
- For example, if the file has narration on the left and silence on the right the Fill from Left effect would duplicate the left channel audio to the right channel.
- Select the audio clip in the Timeline.
- Open the Effects panel.
- Expand the Audio Effects folder.
- Drag the Fill Left or Fill Right effect on the clip in the Timeline.
- Fill Left duplicates the left channel onto the right channel.
- Fill Right duplicates the right channel onto the left channel.
- Now the audio will playback on both channels. The waveform display in the Timeline will only show audio on one channel.