Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 55)

Dolby Pro Logic II Support
Dolby ® DP570 Multichannel Audio Tool User’s Manual 39
Matrix is primarily for radio reception in cars. It is essentially the same as the original
passive Dolby Surround decoder without the directional steering provided by Pro Logic.
Matrix mode can also enhance mono programs, and can be used to try to clean up weak
radio signals in cars. You can apply Matrix to a mono input by selecting the Lo/Ro
downmix, and then Pro Logic II. Neither Pro Logic II nor Pro Logic is available in a mono
downmix.
Panorama mode sends the stereo signal to the surround speakers as well as the front Left
and Right. The Panorama setting is disregarded if the Pro Logic II mode is anything other
than Music.
Dimension adjusts the focus of the signal from the front speakers to the rear speakers. If
the Pro Logic II mode is anything other than Music, the Dimension setting is read as 0
(Center).
Center Width steers the Center output signal between the Center, Left, and Right outputs.
At –3, the Center output is sent 100 percent to the Center channel. L/R sends the center
output equally to Left and Right, with nothing sent to Center.