Sound on both TV and Headset - How do I suppress the TV sound?
Q: I can hear the sounds on both the TV and in the headset. How do I suppress the sound on TV without affecting the sound in the headset?
A: This may sound silly, but the easiest solution for Xbox 360 and PS3 is to mute your TV or simply turn the TV volume down. This solution works for most Xbox 360 and PS3 configurations, whether you have an HDTV or a standard-definition TV.
Alternate Solution #1 (PS3 via HDMI only): If you want sound in your headset only, from the XMB, go to Settings > Sound Settings > Audio Multi-Output > Off. If you turn off Audio Multi-Output, every time you want to switch between headset and TV sound you will need to go to Settings > Sound Settings > Audio Output Settings > HDMI (for TV only) or Audio Input Connector / SCART / AV MULTI (for headset only).
The Audio Output device can only be changed from the start-up XMB; you cannot change this setting from the in-game XMB.
NOTE: If you have connected your headset to your TV's Output, muting or turning the TV volume down will also affect the headset.
Alternate Solution #2 (Xbox 360 or PS3 via standard RCA yellow/white/red AV cable): Link the headset's white and red connectors to the white and red plugs from your Xbox 360 or PS3 AV cable. But to prevent audio from playing through the TV, don't plug the white and red cables to the TV. Your headset will have a direct audio feed from the game console, but no audio will play from your TV.