Press SOUND to access the audio settings menu. Turn TUNE to scroll to Equalizer and press OK/MENU.
Select wavelength by turning TUNE and confirm with OK/MENU.
Adjust the audio setting by turning TUNE and confirm with OK/MENU or undo the command using EXIT. Continue in the same way with other wavelengths to be changed.
When the audio setting is complete, press EXIT button to confirm and return to normal view.