Using the equalizer, you can boost or reduce the levels of specific frequencies.
Step 1:
Select the audio clip that you want to edit. This can also be a built-in audio clip on the video track.
Step 2:
Click the Audio Properties button on the toolbar to open the audio tools. There, scroll down in the audio tools and click Equalizer.
Step 3:
Choose an equalizer preset (optional)
Step 4:
Drag the volume bars to adjust the frequencies to the necessary level.