TV Matrix Parameters

DC-1 Effects

Lexicon

TV Matrix

The TV Matrix effect provides surround effects for television viewing of monaural, stereo, and stereo synthesized programs.

Parameter	Initial Value	Range
AUTO AZIMUTH	ON	ON/OFF
FRONT STEERING	FULL	1/4, 1/2, Full, Off
REAR ROLLOFF	8.2kHz	453Hz-20.0kHz
DOLBY B NR	OFF	ON/OFF
RE-EQUALIZER	OFF	ON/OFF
SIDE ASSIGN	SIDE	Front/Side, Front/Rear*
SURROUND LEVEL	+0dB	-5 to +5dB
SUBWOOFER LVL	0dB	-5 to +5dB
EFFECT LEVEL	+00dB	-30 to +05dB
CUSTOM

* Dependent on speaker configuration

AUTO AZIMUTH is short for auto azimuth error correction/automatic input balance. Auto Azimuth should be set to ON for films, and OFF for music. When ON, special patented algorithms continually monitor the input signal and adjust both the relative level and time offset of the two channels to keep the dialog properly centered and special effects properly localized. This automatic feature is the reason the unit does not need an input balance control for Dolby Surround decoding.

FRONT STEERING The essence of the TV MATRIX Effect is that dialog, music, and surround effects are dynamically directed to the output chan- nels, a process called steering. The FRONT STEERING control allows you to adjust the amount of steering in the front channels. When this control is set to FULL, the steering is identical to Dolby Pro Logic. At 1/2, steering is reduced to accommodate the wide range of television programming. Select- ing OFF will steer the center signal to both the left and right channels. This parameter is automatically set to OFF for systems configured without a center speaker.

REAR ROLLOFF sets the cutoff frequency of a low pass filter in the rear- channel. Frequencies above this setting are attenuated. This control should be set high enough to give presence and airiness to the rear sound without placing distracting instrumental overtones or other sounds behind you. In systems configured without rear speakers, the settings affect the side out- puts.

DOLBY B NR is used in Pro Logic and THX effects for the surround channels according to Dolby specifications. Because Dolby Surround encoded pro- gram material is generally listened to with the unit set for Pro Logic or THX, this parameter is normally off.

RE-EQUALIZER equalizes the left, center, and right channel outputs to match the overall frequency balance of the original recording. Without this re-equalization, many films and some television programs will sound too bright.