Sony NSZ-GT1 - Manual (Page 74)

Press Fn + 1 and select [Picture & sound] - [BD audio mix setting].
Note
Do not change settings while playing a Blu-ray disc.
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Dolby Digital (Optical)
Select the audio signals to be output when playing discs recorded with Dolby Digital audio.
Press Fn + 1 and select [Picture & sound] - [Dolby Digital (Optical)].
When the connected device does not have a built-in Dolby Digital decoder, select [Off (Downmix
PCM)].
Tip
The audio signals are output by Linear PCM if [Off (Downmix PCM)] is selected when
connected to a device without a built-in Dolby Digital decoder.
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Dolby Digital pass-through
Set whether or not to transmit Dolby Digital signals from the cable/satellite box to your audio
system via an HDMI or an optical digital cable connection.
Press Fn + 1 and select [Picture & sound] - [Dolby Digital pass-through].
Note
When [Dolby Digital pass-through] is set to [On] and the cable/satellite box outputs PCM
signals, PCM signals are transmitted to your audio system.
This setting has no effect when you use the PIP (Picture-in-Picture) function.
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On:
Outputs the audio obtained by mixing the
interactive and secondary audio to the primary
audio.
Off: Outputs the primary audio only. Select this to
output HD audio signals, such as Dolby TrueHD,
to an AV Receiver.
On:
Transmits Dolby Digital signals to your audio
system when the cable/satellite box outputs Dolby
Digital signals. When relaying Dolby Digital
signals, other audio signals cannot be
transmitted.
Off: Transmits only PCM signals from the
cable/satellite box to your audio system.
NSZ-GT1 74