Select Settings > Sound.

Volume Mixer

Set the volume levels for different types of audio, such as media, navigation prompts, and phone calls. You can select to set the volume separately for each media source.

Audio Control

Sets the bass boost, balance, and fade.

Equalizer

Sets the equalizer setting (Changing the Equalizer Setting).

Subwoofer

Sets the low pass filter, output phase, and volume for the subwoofer. For more information about optimal settings for your subwoofer, see the owner's manual for your subwoofer.

Loudness

Boosts the bass and treble levels to create a fuller sound when listening at lower volumes.

Hard Key Sounds

Enables the device to play sounds when you touch hardware keys.

Touch sounds

Enables the device to play sounds when you touch some on-screen objects, such as the keyboard.