To get 6.1 channels, you need to have one more speaker for your rear center. Another thing is a Dolby Pro-logic receiver which you might already have for your old home theater system. Pay real close attention to which signals are digital, which are analog, which one got o the front speakers and which go to the surrounds. To get 6.1 channels, all you have to do is pertend that the two decoded DD surround channels are quasi- Dolby Surround analog signals and "decode" them to three channels using a Dolby Pro-logic circuit switched to its "3 stereo" mode.

To get everything work right, you'll have to follow the speaker-balancing routine that's a bit more complicate than with 5.1 channels.

-First step, set your Dolby Pro-logic receiver to 3 stereo mode and balance the levels of the three surround speakers using the test-tone generator and the channel level controls of the receiver. (To revert to standard 5.1 channel sound, just set the Pro-Logic receiver to normal stereo playback)

-Second, switch the Pro-Logic receiver to its CD input and set its volume control slightly higher than the setting you normally used when listening to the CDs. Don't touch any level control on this reciver again!

-Third, turn the Dolby DIgital preamp's test-tone generator and balance the three front and the sourround speakers using the control in the DD preamp. One more thing you need to know, you will get 6.1 channel only when you use with true 5.1-channel soundtracks or music. It won't produce good resutls with Dolby Pro=-Logic soundtracks. Finally, enjoy your 6.1 channels.

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