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Appendix- 113 -
5-2-3 Enabling the Dolby Home Theater Function
Before Dolby Home Theater is enabled, you get only 2-channel playback output (from the
front speakers) when playing 2-channel stereo sources. You must play 4-, 5.1-, or 7.1-
channel content to get 4-, 5.1-, or 7.1- channel audio effects. With Dolby Home Theater
enabled, 2-channel stereo content will be transformed into multi-channel audio, creating a
virtual surround sound environment
(Note)
.
Dolby Home Theater Control Buttons
1. : This button provides you with more controls over the onboard audio.
2. DOLBY HEADPHONE:
Click this button to enable or disable the Dolby Headphone function. Enabling Dolby Headphone
allows 2-channel stereo content to be heard as surround sound from any set of headphones.
3. DOLBY PRO LOGIC II:
Click this button to enable or disable the Dolby Pro Logic II function.
Enabling Dolby Pro Logic II allows 2-channel stereo content to be processed into 4- or 5.1- channel
surround sound, depending on your speaker configurations.
4. DOLBY VIRTUAL SPEAKER:
Click this button to enable or disable the Dolby Virtual Speaker function. Enabling Dolby Virtual
Speaker allows 2-channel stereo content to be heard as surround sound from two speakers.
5. DOLBY DIGITAL LIVE:
If your surround sound system is connected via an external decoder, click the Audio I/O tab in
the Audio Control Panel. Either click Dolby Digital 5.1 in the upper left list or click the DOLBY
DIGITAL LIVE button at the center bottom of the Audio Control Panel. And click the DOLBY PRO
LOGIC II button. The system will then simulate 5.1 channel surround sound playback from two-
channel content.
After installing the audio driver, at the center bottom of the Audio
Control Panel, you should find the Dolby Home Theater control but-
tons as shown below:
A. Windows XP
(Note) When Dolby Digital Live is enabled, only digital audio output (S/PDIF) is working, and you will
not hear any sound from analog speakers or headphone.
B. Windows Vista
1. : Click Dolby Pro Logic IIx.
The system will expand 2-channel audio for a 7.1-channel
surround sound playback.
2. : Click Natural Bass to enable
speaker bass effect.
Install the Dolby GUI Software driver from the motherboard driver disk. Click the Start icon . Point
to All Programs, Dolby Control Center to access the utility.
(The following illustration demonstrates a 7.1-speaker configuration as an example.)