Lexicon SDP-40 - Manual (Page 84)

5-10
The MODE ADJUST Menu
JBL
5.1 THX SURROUND EX or 5.1 THX
The SURROUND EX parameter activates and deactivates the 5.1
THX SURROUND EX listening mode, provided both side and rear
speakers are selected (see page 3-18). The default value of this
parameter is ON, which activates the 5.1 THX SURROUND EX
listening mode. When set to OFF, the 5.1 THX SURROUND EX
listening mode becomes 5.1 THX. Toggling the setting of the
SURROUND EX parameter produces low-level clicks in the front
speakers.
5.1 THX SURROUND EX
• Designed for playback of Dolby Digital Surround EX encoded
sources.
• Similar to 5.1 THX, but utilizes Dolby Pro Logic to decode three
surround channels from Dolby Digital Surround EX-encoded
input types.
• Applies re-equalization and timbre matching. Re-equalization
simulates the high-frequency rolloff that occurs in a movie the-
ater as sound travels from the speakers to the listeners. Most
films are mixed for movie theaters, and may sound too bright
when played back in a home theater without re-equalization.
Timbre matching helps minimize the timbre differences
between the front and side channels, which results in smoother
sound movements between these channels.
• Recommended for Dolby Digital Surround EX encoded
sources.
5.1 THX
• Designed for playback of 5.1-channel Dolby Digital encoded
sources.
• Utilizes Dolby Digital to decode 5.1 discrete channels from 5.1
Dolby Digital encoded input types.
• Applies re-equalization, timbre matching, and adaptive
decorrelation. Re-equalization simulates the high-frequency
rolloff that occurs in a movie theater as sound travels from the
front speakers to the listeners. Most films are mixed for movie
theaters, and may sound too bright when played back in a
home theater without re-equalization. Timbre matching helps
minimize the timbre differences between the front and side
channels, which results in smoother sound movements
between these channels.
Adaptive decorrelation increases the perceived width of the
listening space. Since movie theaters utilize surround speaker
arrays and most home theaters do not, decorrelation of the
mono surround channel increases the perceived width of the
surround field in a home theater.
• Recommended for Dolby Digital encoded sources.
Default
Parameter Value Values
RE-EQUALIZER ON ON, OFF
SURROUND EX ON ON, OFF
COMPRESSION OFF AUTO, ON, OFF
LFE MIX +0.0dB -10.0 to +0.0dB
OUTPUT LEVELS See page 5-17 for more information
CUSTOM See page 5-17 for more information
An alphabetical listing of parameter descriptions begins on page 5-20.
5.1 SUR EX MODE ADJUST