Chapter 4: Settings
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S/PDIF Output Modes
The following output modes are available during the playback of Blu-
ray Disc titles when S/PDIF is selected as the speaker environment. The
mode that you should select depends on the external decoder (AV
Receiver) connected to your computer.
• Only primary audio: this mode only outputs the audio from the
primary video (e.g. no sound will be available for Picture-in-
Picture, secondary video streams or director commentaries). The
compressed audio format is passed-through to the external
decoder unit (AV Receiver).
Note: If the primary audio format is another format besides Dolby Digital,
DD+, DTS or DTS-HD, CyberLink PowerDVD will decode it and output both
audio signals simultaneously.
• Dolby Digital mixing: this mode outputs both primary video
sound and secondary video sound simultaneously by mixing
both audio and encodes into a Dolby Digital bitstream. Select
this option if your external decoder unit (AV Receiver) supports
Dolby Digital.
• DTS mixing: this mode outputs both primary video sound and
secondary video sound simultaneously by mixing both audio
and encodes into a DTS bitstream. Select this option if your
external decoder unit (AV Receiver) supports DTS.
HDMI Output Modes
The following output modes are available when an external decoder
(AV Receiver) is connected with an HDMI connector under Windows
Vista. The mode that you should select depends on the external
decoder (AV Receiver) connected to your computer.
• PCM decoded by PowerDVD: this mode creates a digital
representation of an analog signal. Select this option if your
external decoder (AV receiver) does not support Dolby Digital or
DTS to produce a digital sounding output for your audio.
• Non-decoded Dolby Digital/DTS audio to external device: this
mode passes compressed audio through to your external
decoder (AV receiver). Select this option if your amplifier/receiver
