Lexicon DC-1 User Manual download pdf (Page 59)

DC-1 Digital Controller

DC-1Effects

The Church Effect uses a reverberation algorithm, which differs from

ambience in that it does not simulate the reflections of specific halls, but

emphasizes rich, smooth reverberant decay in small and medium spaces. It

works well for simulating a space with a long reverberation time relative to

its size, such as a reverberant chamber, or a church.

Parameter Initial Value Range

MID RT 1.89 sec .89-13.42 sec

BASS RT 2.36 sec 0.7, 1.0, 1.25xMID RT

HALL SIZE 30 Meters 4-30 Meters

PRE-DELAY 24ms 0-88ms

ROLLOFF 2.6kHz 453Hz-20.0kHz

SPEECH DETECT ON ON/OFF

CENTER LEVEL 7 0-15

SUBWOOFER LVL +0dB -5 to +5dB

EFFECT LEVEL -01dB -30 to +05dB

CUSTOM

MID RT (midrange reverberation time) is the time required for midrange

sounds to decay 60dB in level.

BASS RT (low frequency reverberation time) depends on MID RT and is

expressed as a multiplier. BASS RT should be set to 1.0 x MID RT for a more

natural effect in smaller spaces.

HALL SIZE allows you to select hall sizes of lengths ranging from 4-30

meters (in increments of 2 meters).

PRE-DELAY increases the delay between the direct sound and the onset of

reverberation. Because some pre-delay is inherent in the program material,

a value of 0 is usually a good starting point. Increasing the pre-delay value

will make the hall sound larger.

ROLLOFF mimics the absorption of the air in the hall and, typically, should

begin with a low frequency when simulating larger spaces.

SPEECH DETECT activates a circuit that distinguishes monaural speech

from other inputs. Essentially, this control turns down the effect to make

speech clearer. Whenever stereo signals are present, the right and left input

channels 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 to the Church effect is reduced while the stereo

component is increased.

If the input signal is pure monaural speech the reverb is almost entirely

attenuated. SPEECH DETECT is a real benefit to some popular music

(where spoken voice, such as rap, occurs along with the music), stereo

television and early stereo movies. Any stereo material which was not

carefully mixed for surround is a good candidate for playing through the

Church effect with Speech Detect on.

Church

Church Parameters

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Lexicon DC-1 User Manual Page 59

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