Lexicon Lexicon MC-12 manual Surr Rolloff, Surround DLY, Surround EX

MC-12

MODE ADJUST

SURR ROLLOFF 500Hz to 20.0kHz, OFF

Applies high-frequency attenuation control to the Main Zone audio output connectors labeled Side L/R and Rear L/R. This filter is only applied to output signals generated by the MC-12.

SURROUND DLY 0 to 15ms

Increases the perceived depth of the listening space by delaying the arrival time of signals from the side and rear speakers. It is recommended to increase the setting when a greater sense of depth is desired in the listening space.

SURROUND EX AUTO, ON, OFF

Controls the THX Surround EX decoding feature, which can be used to extract a rear channel from 5.1-channel Dolby Digital sources. When ON is selected, THX Surround EX decoding is engaged for all 5.1-channel Dolby Digital sources. When OFF is selected, THX Surround EX decoding is not engaged for all 5.1-channel Dolby Digital sources.

When AUTO is selected, THX Surround EX decoding is engaged when a flagged 5.1-channel Dolby Digital source with THX Surround EX encoding is detected. THX Surround EX decoding is not engaged when a non-flagged 5.1-channel Dolby Digital source with or without THX Surround EX encoding is detected.

Note:

The MC-12 cannot automatically detect THX Surround EX encoding in non-flagged 5.1-channel Dolby Digital sources. A non-flagged input source does not include information in the input signal that identifies THX Surround EX encoding.

THX Surround EX listening modes are available when Dolby Digital Surround EX decoding is engaged. THX or THX Ultra2 listening modes are available when THX Surround EX decoding is not

engaged. Refer to the 5.1 ULTRA2, 5.1 SurEX, & 5.1 listening mode descriptions that begin on page 5-17, the

ULTRA2 & listening mode descriptions that begin on

page 5-24, or the 5.1a ULTRA2, 5.1a SurEX, & 5.1a listening mode descriptions that begin on page 5-28 for more information.

Note the following:

•The SURROUND EX parameter AUTO setting is not available for the 5.1a THX listening modes.

•Toggling the SURROUND EX parameter setting produces low- level clicks in the front speakers.

•THX Surround EX decoding cannot be engaged unless both side and rear speakers are present.

•When the Shift command bank is activated, pressing the remote control THX button while a 5.1-channel Dolby Digital

source is present activates the 5.1 ULTRA2, 5.1 SurEX,

or 5.1 listening mode. Subsequent presses adjust the SURROUND EX parameter, cycling through the AUTO, ON, and OFF settings.

•When the Shift command bank is activated, pressing the remote control THX button while a 5.1-channel analog source

is present activates the 5.1a ULTRA2, 5.1a SurEX, or

5.1a listening mode. Subsequent presses toggle the SURROUND EX parameter between the ON and OFF settings.

. . . Listening Mode Menu Parameter Descriptions continues on page 5-42

5-41