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Converting Dolby 2-channel
audio to 5.1-channel surround sound If you have DVD movies that weren‘t
mastered for Dolby Digital 5.1 or music CDs in 2-channel stereo, you can up-convert
them to 5.1-channel surround sound through the Dolby® Pro Logic® IIx feature. Dolby®
Pro Logic® IIx is an audio expansion technology that delivers a clever surround
effect from any two-channel (stereo) sound source. In this tutorial, you
will learn how to easily convert your 2-channel stereo source to surround sound
5.1-channel. To convert Dolby 2-channel audio to 5.1-channel surround
sound: 1. Open WinDVD 9 and start playing your 2-channel stereo
movie or audio CD. 2. Click Audio and
select Playback Device to open the Enhance
Audio Panel. In the Playback Device tab,
you can select your audio output device, specify the audio technology, and adjust
the speaker gains. 
3.
In Device Selection, select 6 speakers. Note:
The Dolby® Pro Logic® IIx option is available if 4
speakers to 8 speakers is selected. 4.
In Technology, select Dolby ProLogic
IIx. 5. Select Movie or Music
as your listening mode. 6. Dimension creates
a sense of front to back soundstage depth. Use the sliders to adjust the depth
of your soundfield. 7. Adjust the Center
Width slider to control how the center channel sound mixes into the left
and right fronts.
8. Select Panorama to
creates a wraparound surround effect.
Try experimenting with these controls
until you achieve your desired sound quality. The ideal settings will of course depend on your audio content.
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