Orban OPTIMOD-FM 8600Si, Operating Manual

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OPERATION ORBAN MODEL 8600Si
If the
M
ULTIBAND
R
ELEASE
control is set to its faster settings, the distortion produced
by the back-end clipping system will increase as the
M
ULTIBAND
D
RIVE
control is ad-
vanced. The
F
INAL
C
LIP
D
RIVE
and/or the
MB L
IMIT
T
HR
(Multiband Limit Threshold)
controls may have to be turned down to compensate. To best understand how to
make loudness/distortion trade-offs, perhaps the wisest thing to do is to recall a fac-
tory multiband preset and then to adjust the
L
ESS
-M
ORE
control to several settings
throughout its range. At each setting of the
L
ESS
-M
ORE
control, examine the set-
tings of the
M
ULTIBAND
D
RIVE
and
MB L
IMIT
T
HR
controls. This way, you can see how
the factory programmers made the trade-offs between the settings of the various
distortion-determining controls at various levels of processing.
The 8600Si’s multiband clipping and distortion control system works to help prevent
audible distortion in the final clipper. As factory programmers, we prefer to adjust
the
F
INAL
C
LIP
D
RIVE
control over a very narrow range (typically –0.5 dB to –1.0 dB)
and to determine almost all of the loudness/distortion trade-off by the setting of the
M
ULTIBAND
C
LIPPING
control.
The final clipper operates at 256 kHz sample rate and is fully anti-aliased.
Advanced 8500-Style Peak Limiter Controls
The following Peak limiter controls are available only from 8600Si PC Remote soft-
ware.
Overshoot Drive (Overshoot Compensation Drive) sets the drive into the overshoot
compensator with reference to the final clip threshold, in units of dB. The normal
Figure 3-3: Bass Clipper Input/Output Transfer Curves as Bass Clip Shape Control is
Varied from 0.0 (Hard) to 10.0 (Soft)