It looks like your clips are currently using a 5.1 audio channel format, even if they only contain two channels. To use Enhance Speech in the Essential Sound panel, the audio must be set to either mono or stereo.
Here’s how to update the audio format:
- Select the clips in the Project panel (not from the timeline).
- Go to Clip > Modify > Audio Channels.
- Set the Clip Channel Format to Mono or Stereo, depending on your needs.
- For Stereo, set the Number of Audio Clips to 1, for Mono, set it to 2 (one for each channel).
- Click OK to apply the changes.
After modifying the clip’s audio format:
- Drag the updated clips into a sequence that uses Standard audio tracks (not 5.1).
- Select the clips in the timeline.
- Open the Essential Sound panel, assign a type (e.g., Dialogue), and click Enhance to apply Enhance Speech.