To measure and enter the physical distances to your speakers in the setup programm of your decoder
are necassary to "synchronise" the music to your listening position.
That means that the speaker array are timecorrected to your room, or in other words,
you have the same position as the recording engineer in the studio.
So for example (as you can play in "presets" in the setup programm for your controller)
--is the rear prologic signal are delayed with 20 ms--
then the sound from your rear speakers reaches your ear 20 ms later than your front speaker signal.
So when you enter the distances in setup, you get allways the correct information independent of the size
of your room.
With digital surround sources you dont need an extra delay,because the information are allready recorded
with the proper delay (time differences between front and rear music).


[This message has been edited by robert.w (edited 12-30-2001).]


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