WEBVOICE, MUTE, GAME & VOICE BALANCE ASTRO A30 WIRELESS 10 Mute/Unmute Toggle to mute on/mute off, you will hear a tone when you mute on/off. When muted, you will see a red indicator. Volume Control Control your volume using the joystick. To increase volume, move the joystick up. At max volume, you will hear a tone.