3-46
OPERATION ORBAN Model 8400
combination of fast release and independent operation of the bands provides the maxi-
mum loudness and density on small radios achievable by the Two-Band structure. But
such processing may fatigue listeners with high-quality receivers, and also requires you
to activate the AGC to control the average drive level into the two-band compressor, pre-
venting uncontrolled build-up of program density. Instead of operating the Two-Band
structure like this, you should almost always choose a Five-Band preset instead.
Advanced Two-Band Controls
The following Two-Band controls are found only in the Advanced Modify screen.
2B Master Comp Threshold
sets the level where gain reduction starts to occur in the
Master (above 200 Hz) band of the Two-Band Compressor.
2B Bass Comp Threshold
determines the compression threshold of the bass band in the
Two-Band Compressor. It can be used to set the target spectral balance of the Two-Band
Compressor.
As the Two-Band Compressor Bass Coupling control is moved towards
“100%,” the Two-Band Compressor
Bass Thresh control affects the sound
less and less.
2B Master Attack sets the attack time of the Two-Band Compressor master compressor
(above 200 Hz).
2B Bass Attack
sets the attack time of the Two-Band Compressor bass compressor (be-
low 200 Hz).
Lookahead
determines the lookahead time (in milliseconds) in the two-band compressor.
3.6 milliseconds give minimum overshoot for the factory preset attack time of 11.0. If
you adjust
Lookahead for less delay, you will get progressively more overshoot. This
will cause more voice distortion but will create more transient impact on percussion be-
cause transients will hit the clippers harder instead of being controlled inaudibly by the
lookahead compressor.)
2B Crossover
sets the structure of the 2-Band crossover to Linear or Linear with No De-
lay. See page 3-35 for more detail about these modes.
The relationship and interaction of the next four
controls is complicated and is best ap-
preciated by listening and experimenting:
2B Clipping
is a compression threshold control that equally affects the bass and master
bands. It sets the drive level to the high frequency limiting and multiband distortion-
controlling processing that precedes the final clipping section. The distortion-controlling
section uses a combination of distortion-cancelled clipping and look-ahead processing to
anticipate and prevent excessive clipping distortion in the final clipper.
MB Limit Threshold
determines the threshold of the lookahead clipping distortion con-
troller (measured in dB) with reference to the final clipper. In general, it should be set at
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