Zte LIGHT V9 User Manual page 306

If you want to adjust the notification volume together with ringer volume,
select the Use incoming call volume for notifications check box.
Enable the touch tones
You can set your LIGHT to play tones when touching the keys of Dialer.
Select the Audible touch tones check box in the Feedback section.
Enable the screen selection tones
You can set your LIGHT to play sound while making a selection by
touching the screen.
Select the Audible selection check box in the Feedback section.
Enable Dolby Mobile
You can enable Dolby Mobile for better sound quality.
When Dolby Mobile is on, you can tap the Menu Key > Dolby Mobile
Settings to select a music mode when playing the music track.
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