Dolby Laboratories DP570 - Manual (Page 53)

Using the DP570 Features Dolby Pro Logic II Support
Dolby ® DP570 Multichannel Audio Tool User’s Manual 41
The master Volume slider allow you to raise or lower the volume of all the outputs
simultaneously.
4.21 Dolby Pro Logic II Support
The DP570 supports four Pro Logic II modes: Movie, Music, Pro Logic, and Matrix.
Panorama, Dimension, and Center Width offer a variety of settings activated in Music
mode.
Movie mode is the standard setting for programs with video. This decoding is based on the
original Pro Logic decoding scheme, but with the single Surround channel separated into
Left and Right Surround channels.
Music mode is the most versatile feature of Pro Logic II. The settings on the Panorama,
Dimension, and Center Width menus can help a consumer make a stereo (Lo/Ro)
recording into one that takes advantage of a multichannel listening environment.
Particularly attractive for automotive entertainment systems, this can be used in home
theaters as well.
Pro Logic is the Pro Logic II system reproduction of the original Pro Logic decoding
system. Because consumer decoders now offer Pro Logic II as the default Dolby Surround
decoding system, this emulation mode is available to reproduce the original Pro Logic
decoding if the consumer wishes to hear it. (This option is not available on all consumer
decoders made with Pro Logic II.)
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.
Figure 4-10
Master Trim Control Figure 4-11
Master Volume Control
Note: Movie is the recommended mode for professional monitoring. The wide range of
possible choices in Music mode make it too complex and unpredictable to
emulate.