No audio or low audio with a home theater system.

• Press the (Quick Settings) button, then select [Speakers] — [Audio system].
• If the audio system is not compatible with Dolby Digital or DTS, set [Settings] — [BRAVIA Settings] — [Digital Audio Out] to [PCM].
• Check if the [Digital audio out volume] setting of the TV is at maximum.

  Press the (Quick Settings) button, then select [Sound settings] — [Advanced] — [Common] — [Digital audio out volume].

• When using HDMI input with Super Audio CD or DVD-Audio, DIGITAL AUDIO OUT (OPTICAL) may not provide an audio signal.