Advanced Features
31
ENGLISH
MODE
FEATURES
DELAY TIME RANGE
DOLBY PRO LOGIC
Dolby Pro Logic is the standard mode for surround sound decoding. It uses information
15 ms – 30 ms
encoded in a two channel stereo recording to produce four distinct channels:
Initial Setting = 20 ms
Left, Center, Right and Surround. Use this mode for accurate reproduction of programs
bearing the Dolby Surround, DTS Stereo, UltraStereo or other “Surround” logos.
Surround encoded programs include videocassette and LD movies, TV and
cable programs, radio programs and audio CDs. Dolby Pro Logic processing
may also be used to provide a pleasing surround effect with some source material that
does not carry surround encoding.
THX CINEMA
THX Cinema is a patented process developed by Lucasfilm Ltd. as an enhancement
15 ms – 30 ms
to surround processing. It includes additional enhancements that greatly improve
Initial Setting = 20 ms
the spectral and spatial realism of motion pictures that are recorded with the same
usual surround encoding as for DOLBY PRO LOGIC. THX Cinema’s exclusive
processing is designed to overcome the differences in acoustics between movie
theaters and home listening rooms so that movie sound tracks will sound the same
way at home as they did in the mixing room where they were created.
DOLBY 3 STEREO
Dolby 3 Stereo uses the information contained in a surround encoded or stereophonic
No Surround Channels
program to create center channel information. In addition, the information that is
normally sent to the rear channel surround speakers is carefully mixed in with the front
left and right channels for increased realism. Use this mode when you have a center
channel speaker, but no surround speakers.
MOVIE SURROUND
Movie Surround uses decoding similar to Pro Logic, but it permits delay
10 ms – 90 ms
times up to 90 ms. Use this mode instead of Pro Logic or THX to experiment with
Initial Setting = 20 ms
surround times above 30 ms, or if the delay time formula suggests a
larger time delay for your room.
HALL SURROUND
This mode is designed for use with stereo recordings. It provides a sound field effect that
10 ms – 90 ms
simulates the complex combination of direct and reflected sounds that create
Initial Setting = 20 ms
the rich reverberant atmosphere of a medium sized circular concert hall.
MATRIX SURROUND
This mode is designed for use with sports broadcasts, live concerts or other programs
10 ms – 90 ms
where the feeling of a wide surround effect is desired.
Initial Setting = 20 ms
MONO
This mode is intended for use with old music or movies, televisions shows and other
No Surround Channels
programs that have only monaural sound track. All sound will be reproduced through
the center channel speaker, if installed. If there is no center channel speaker,
monaural sound is reproduced from the front left and right speakers.
STEREO
This mode turns off all surround processing and presents the pure left and right
No Surround Channels
channel presentation of two channel stereo programs.
Surround Mode Chart
AVR80 manual 11/01/98 13:01 Side 31
