Operation Manual

Chapter 4: Configuration
83
analog interfaces, designed by the Sony and Philips
corporations. To enjoy true 6 speaker output quality, you must
have an external Dolby Digital/DTS decoder along with a SPDIF-
compliant sound card to make this selection available.
Note: If the SPDIF audio output is enabled, the volume control for CyberLink
PowerDVD Ultra will be disabled as your decoder assumes the task.
•The 4 Speaker selection is for computers equipped with sound
cards which support 4-ch output.
•The 6 Speaker selection (a.k.a. 5.1 channels) is for computers
equipped with sound cards which support 6-ch output and is
optimal for DVD Video titles that feature multichannels encoding
such as Dolby Digital 5.1 or DTS 5.1.
•The 7 Speaker and 8 Speaker options are available for users
who have multiple speakers and wish to output audio to each of
them.
2. The following selections will only be available depending on your
selection in the Speaker Environment section.
• The major difference between Dolby Surround Compatible
Downmix and Stereo is that Dolby Surround uses the Dolby
Surround downmixing algorithm and the possibility exists of
connecting an analogue Pro Logic decoder to the sound card so
as to enable 4-ch surround sound (left, right, center, surround)
for Dolby Surround. Otherwise, both are relatively similar in 2-
channel output. For more information, see "Miscellaneous" on
page 85.
• Dolby Headphone is a post-processing effect designed to create
a virtual surround sound experience particularly for a
headphone environment but is suitable also for both notebook
and desktop environments. For more information, see "Dolby
Headphone" on page 88.
•The CyberLink Headphone option uses technology developed
by CyberLink to improve the quality of audio output from a
notebook over headphones. The Advanced options simulate the
very different experiences of listening to sound in a well-damped
Living Room, a small Theater, or a large Stadium. For more
information, see "CL Headphone (Optional)" on page 89.