Advanced 5-Band Controls - Orban OPTIMOD 6300 Operating Manual

OPTIMOD 6300 DIGITAL

Advanced 5-band Controls

The following Advanced Multiband controls are available only from 6300 PC Remote
software.
B1-B5 Attack (Time); Speech B1-B5 Attack controls set the speed with which the
gain reduction in each band responds to level changes at the input to a given band's
compressor for music and speech respectively, following the 6300's automatic
speech/music detector. These controls are risky and difficult to adjust appropriately.
They affect the sound of the processor in many subtle ways. The main trade-off is
"punch" (achieved with slower attack times) versus distortion and/or pumping pro-
duced in the look-ahead limiter (because slower attack times increase overshoots
that the look-ahead limit must eliminate). The results are strongly program-
dependent and must be verified with listening tests to a wide variety of program
material.
Because there are separate controls for music and speech (page 3-5), you can set at-
tack times faster for speech (to minimize look-ahead limiter artifacts) and slower for
music (to maximize punch and transient definition).
The A time controls are calibrated in arbitrary units that very approximately
TTACK
correspond to milliseconds. Higher numbers correspond to slower attacks.
Limiter Attack controls allow you to set the limiter attack anywhere from 0 to
100% of normal in the 5-band compressor / limiters. Because the limiter and com-
pressor characteristics interact, you will usually get best audible results when you set
these controls in the range of 70% to 100%. Below 70%, you will usually hear
pumping because the compressor function is trying to create some of the gain re-
duction that the faster limiting function would have otherwise achieved. If you hear
pumping in a band and you still wish to adjust the limiter attack to a low setting,
you can sometimes ameliorate or eliminate the pumping by slowing down the com-
pressor attack time in that band.
Delta Release controls are differential controls. They allow you to vary the release
time in any band of the 5-band compressor/limiter by setting an offset between the
M R
ULTIBAND ELEASE
For example, if you set the M
GR control to –2, then the band 3 release time will be the same as if you had
3 D
ELTA
set the M
ULTIBAND
0. Thus, your settings automatically track any changes you make in the M
control. In our example, the release time in band 3 will always be two "click
R
ELEASE
stops" slower than the setting of the M
If your setting of a given D
slower than "slow" or faster than "fast" (the two end-stops of the M
control), the band in question will instead set its release time at the appro-
R
ELEASE
priate end-stop.
Bx Compression Ratio: See page 3-45.
setting and the actual release time you achieve in a given band.
R
ULTIBAND
control to medium and set the B
R
ELEASE
ULTIBAND
R
ELTA ELEASE
control to medium-fast and the B
ELEASE
AND
control.
R
ELEASE
control would otherwise create a release
OPERATION
AND
GR control to
3 D
ELTA
ULTIBAND
ULTIBAND
3-55