Lexicon CP-1 User Manual download pdf (Page 27)

Page 23

CP-1 Digital Audio Environment Processor

The Programs:

Ambience

ROLLOFF mimics the absorption of the air in the hall and its initial value is

therefore more pronounced (the rolloff begins at a lower frequency) the

larger the space.

Rolloff

PANORAMA EFFECT adjusts the strength of the signal used to expand the

stereo image outward from the front two speakers. It is only needed when

side speakers are absent.

Panorama Effect

LISTENER POS compensates for the relative distance of the two main

speakers from the prime listening area. It should be set for the value arrived

at in the Panorama set-up procedure on page 11.

Listener Position

SPEAKER ANGLE compensates for differing distances between your front

speakers. It affects only the Panorama Effect and is only needed when side

speakers are absent. The Speaker Angle can be set to the value reached in

the setup procedure on page 11, but the program may also work well at

lower values.

The image expansion will be strongest at the one location in the room for

which the program has been calibrated (See page 10). It will diminish

somewhat as you move forward or back from that location and more rapidly

as you move from side to side.

Speaker Angle

The Speech Detection circuit distinguishes monaural speech from other

inputs. Whenever stereo signals are present, the right and left input chan-

nels are used independently as inputs to the ambience synthesis. If there is

a strong monaural speaking voice present at the same time, this component

of the input is reduced while the stereo component is increased. If the input

signal is pure monaural speech the input is almost entirely attenuated.

SPEECH DETECTION is a real benefit to some popular music (where

spoken voice, such as rap, occurs along with music), stereo television, and

early stereo movies. Any stereo material which was not carefully mixed for

Surround is a good candidate for playing through Ambience with SPEECH

DETECTION On.

Speech Detection

The procedures for naming a new version of the program (SET PROGRAM

NAME) and storing it in one of the User registers (MEMORIZE PROGRAM)

are described on page 29.

Set Program Name/

Memorize Program

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Lexicon CP-1 User Manual Page 27