3Com CP-1 Program Parameters contd Auto Azimuth, Balance, Bass Blend, Rear Effect, Calibrate

The Programs:

Surround

Lexicon

Program Parameters cont'd
Auto Azimuth/	The AUTO AZIMUTH/BAL parameter should be set to ON for films, OFF
Balance	for music. When it is on, special digital circuits continually monitor the
	dialog and adjust both the relative level and time offset of the two channels
	to keep the dialog properly centered. This automatic feature is why the CP-
	1 does not have or need a front-panel input balance control for Dolby
	Surround decoding.
Bass Blend	BASS BLEND takes the low bass from the center, where it is in many film
	and music mixes, and distributes it instead to the left and right front-
	channel speakers. Its initial value is 0 in the Stereo Logic program and 6 in
	Pro Logic. This is valuable because in many video installations the center
	speaker is smaller than the two main stereo speakers and is, therefore, less
	capable of handling the lowest frequencies.
Front Effect/ The essence of the Dolby PRO LOGIC circuit is that dialog, music and sound
Rear Effect	effects are dynamically directed to the output channels, a process called
	steering. The FRONT EFFECT and REAR EFFECT parameters in Stereo
	Logic allow you to adjust the amount of this steering. Both are preset for
	their maximum values in PRO LOGIC. In STEREO LOGIC, FRONT
	EFFECT has a default value of 8, which is equivalent to 6 dB of steering; at
	this level, central (monaural) sources are reduced in level by 6 dB in the main
	stereo speakers. With FRONT and REAR EFFECT both set to 0, STEREO
	LOGIC becomes the equivalent of a simple non-steered Dolby Surround
	decoder. If you have no rear speakers, REAR EFFECT should be set to 0. The
	CP-1 will set this parameter automatically when you specify a speaker
	configuration with no rear channels. (See page 13.)
Rear Noise Chip	Dolby Surround decoding specifications call for a special form of Dolby B-
	type noise reduction. Because STEREO LOGIC is also meant for music, the
	rear-channel sound has more flexibility, including REAR NOISE CHIP, a
	parameter that allows you to turn this Dolby NR circuit off.
Calibrate	The CALIBRATE mode in Stereo Logic and Pro Logic is for setting up and
	checking the levels of the channels in multi-speaker systems. Its use is
	covered in the section on Balancing Additional Channels on page 10.
Set Program Name/	The procedures for naming a new version of the program (SET PROGRAM
Memorize Program	NAME) and storing it in one of the User registers (MEMORIZE PROGRAM)
	are described on page 29.

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