Stereo Enhancer Controls - Orban OPTIMOD 6300 Operating Manual

OPTIMOD 6300 DIGITAL
Highpass Filter determines if a sweepable 18 dB/octave highpass filter will be
placed in-circuit before other processing. This filter is useful for reducing low fre-
quency noise, particularly when the 6300 is being used for production or mastering.
Lowpass Filter control sets the bandwidth (and therefore the amount of high fre-
quency signal the 6300 passes) from 10 kHz to 20 kHz. The lowpass filter can replace
any anti-aliasing filters in downstream equipment. Set the filter to 20 kHz (full
bandwidth) for downstream equipment with sample rates of 44.1 or 48 kHz. Set the
filter to 15 kHz for 32 kHz sample rate. For other sample rates, set the filter so that
it is as close as possible to 45% of the sample rate without exceeding 45%.
This setting is unique to the preset in which it resides. Regardless of its
setting, the 6300 will not permit the system bandwidth to exceed the
bandwidth set by the M
Phase Rotator determines if the phase rotator will be in-circuit. The purpose of the
phase rotator is to make voice waveforms more symmetrical. Because it can slightly
reduce the clarity and definition of program material, we recommend leaving it O
unless program material is mainly speech, where it may result in cleaner sound be-
cause it can substantially reduce the amount of gain reduction that the 6300's look-
ahead limiter produces on speech waveforms.

Stereo Enhancer Controls

You can operate the stereo enhancer in one of two modes or "styles." The first is
called L–R E
XPAND
second mode, called D
turer that adds a delayed version of the L–R signal to the original L–R to create ste-
reo enhancement. (See Stereo Enhancement on page 3-9 for more information.)
Both modes have gating that operates under two conditions.

The two stereo channels are close to identical in magnitude and phase.
In this case, the enhancer assumes that the program material is actually
mono and thus suppresses enhancement to prevent the enhancement
from exaggerating the undesired channel imbalance.

The ratio of L–R / L+R of the enhanced signal tries to exceed the threshold set by
Stereo Enhancer Controls
Basic / Full Modify Name
DEPTH
DIFFUSION
ENH AMT
ENHANCER
RATIO LMT
STYLE
L
AX OWPASS
and emulates the Orban 222 analog stereo enhancer, while the
ELAY , emulates a popular enhancer from another manufac-
Advanced Name
Depth
Diffusion
Amount
In / Out
Ratio Lim
Style
Table 3-5: Stereo Enhancer Controls
F
parameter located I/O Setup.
ILTER
Range
0 ... 10
Off, 0.3 ... 10.0
0.0 ... 10.0
Out / In
70 ... 100%
L–R Expand / Delay
3-39
OPERATION
UT