Orban OPTIMOD-FM 8700, Operating Manual

Page: 195 / 390

OPTIMOD-FM DIGITAL OPERATION
3-25
The remaining three preset types (listed below) are identical to their counterparts in
Optimod-FM 8500:

If the preset has “UL” in its name, it uses the Ultra-Low Latency Five-Band struc-
ture. “UL” presets are not as competitive as other presets and should only be
used if you absolutely need the low delay (for off-air cueing of finicky talent, for
example).

Presets with LL in their names use the Hard LL bass clipper mode to achieve 13 ms
input-output delay.

Presets without MX, LL, or UL designators in their names have “optimum delay”
for an 8500-style preset. This delay is approximately 18 ms delay (5-band) and
21 ms delay (2-band).
PROTECTION-0DB:
P
ROTECTION
-0
DB
is a two-band preset with a high amount of band
coupling. It is intended for use below threshold most of the time (i.e., with 0 dB gain
reduction), to provide protection limiting in the highest quality applications such as
serious classical music intended for an attentive audience. Its
L
ESS
-M
ORE
control de-
termines the normal amount of gain reduction but does not increase distortion or
other processing artifacts when turned up.
CLASSICAL, CLASSICAL MX: The 8700i offers 8500-style and MX variants of all classical
presets. The MX versions provide less preemphasis limiting, lower distortion, and
higher transient impact than the non-MX versions and are therefore recommended
if their longer delay is acceptable.
As their names imply, the
CLASSICAL 5-BAND
and
CLASSICAL 2-BAND
presets are
optimized for classical music, gracefully handling recordings with very wide dynamic
range and sudden shifts in dynamics. The Five-Band version uses heavy inter-band
coupling to prevent large amounts of automatic re-equalization, which could oth-
erwise cause unnatural stridency and brightness in strings and horns and which
could pump up very low frequency rumble in live recording venues.
The Five-Band preset defeats the AGC, using only the multiband compressor for gain
reduction. It also defeats phase rotation to ensure the most transparent Five-Band
sound available.
Even more transparent, “purist” classical processing is available from the
CLASSICAL
2-BAND
preset, which is phase-linear and which preserves the spectral balance of the
original material as much as possible. However, if you need a bit more automatic re-
equalization than the
CLASSICAL 2-BAND
preset provides, use the
CLASSICAL 5-
BAND
preset.
CLASSICAL-5B+AGC
uses the AGC set for 2:1 compression ratio. Because of the
AGC, it affects more of the total dynamic range of the recording than does the
CLASSICAL-5 BAND
preset. However, the AGC provides extremely smooth and un-
obtrusive compression because of the gentle ratio and window gating. This preset
uses the Five-Band compressor very lightly with a fast release time as a peak limiter.
The AGC does almost all of the compression.