DTV Audio LevelScreen Menu > Sound > Additional Settings > DTV Audio Level Try Now(Digital channels only)The TV cannot freely control the volume of the digital audio that it sends to the AV receiver. Use thisto set the digital audio volume at a comfortable level." According to the type of broadcast signal, MPEG / HE-AAC can be adjusted between -10dB and 0dB." To increase or decrease the volume, adjust between the range 0 and -10 respectively.Digital Audio OutScreen Menu > Sound > Additional Settings > Digital Audio Out Try NowThis SMART TV is SPDIF-enabled. The Sony Philips Digital Interface (SPDIF) provides digital audiooutput to speakers and various digital devices, including A/V Receivers and home theatres. This featurereduces interference and distortion.● Audio FormatSelects the Digital Audio output (SPDIF) format. The available Digital Audio output (SPDIF)formats may vary depending on the input source.● Audio DelayThis setting helps correct timing mismatches between the audio and video tracks when watchingTV and listening to audio through a digital audio device. Enabling the feature displays a slide barthat you can use to adjust the delay by up to 250ms.