Sound levels for different frequencies can be adjusted separately using this feature. To do so:

1. Press OK/MENU to access Audio settings and select Equalizer

2. Turn TUNE to select one of the frequencies and press OK/MENU.

3. Turn TUNE to adjust the sound setting and confirm the change by pressing OK/ MENU. Do the same for the other frequencies.

4. When you have finished making your settings, press EXIT to save.