Orban OPTIMOD 8685 User Manual

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OPERATION ORBAN MODEL 8685
Bx Compression Threshold
sets the compression threshold for each band in units
of dB. We recommend making small changes around the factory settings to preserve
the internal headroom built into the processing chain. These controls will affect the
spectral balance of the processing above threshold.
You can use the Bx S
PEECH COMPRESSION THRESHOLD control to set independent fre-
quency balances for music and speech in the 2.0 processing chain, (page 3-6). The Bx
C
ENTER COMPRESSION THRESHOLD control performs a similar function in the surround
processing. It is particularly useful when setting up the center channel to de-ess dia-
log. The S
PEECH and CENTER controls appear only in Advanced Control.
MB Gate Threshold
control determines the lowest input level that will be recog-
nized as program by OPTIMOD 8685; lower levels are considered to be noise or
background sounds and cause the AGC or multiband compressor to gate, effectively
freezing gain to prevent noise breathing.
The multiband gate only works appropriately when the K
NEE and RATIO controls of
all bands are set identically, which is typically true in broadcast applications. We rec-
ommend turning off the multiband gate if the individual K
NEE and RATIO settings
are unequal.
There are two independent gating circuits in the 8685. The first affects the AGC and
the second affects the multiband compressor. Each has its own threshold control.
The multiband silence gate causes the gain reduction in bands 2 and 3 of the multi-
band compressor to move quickly to the average gain reduction occurring in those
bands when the gate first turns on. This prevents obvious midrange coloration un-
MB Attack/Release/Threshold
Full Name Advanced Name Range
MB Release Multiband Release Slow, Slow2, Med, Med2, MFast, MFast2,
Fast
--- Speech Multiband Release Slow, Slow2, Med, Med2, MFast, MFast2,
Fast [2.0 only]
--- Center Multiband Release Slow, Slow2, Med, Med2, MFast, MFast2,
Fast [surround only]
Bx THR Bx Compression Threshold –16.00 … 0.0, Off
--- Bx Speech Compression Thresh –16.00 … 0.0, Off [2.0 only]
--- Bx Center Compression Thresh –16.00 … 0.0, Off [surround only]
--- Bx Attack 4.0 … 50.0 ms, Off
--- Bx Speech Attack 4.0 … 50.0 ms, Off [2.0 only]
--- Bx Center Attack 4.0 … 50.0 ms, Off [surround only]
--- Bx Limiter Attack 0 … 100%
--- Bx Delta Release –6 … 6
--- Bx Compression Ratio
1:1 … ∞:1
--- Bx Knee 0 … 50 dB
--- Bx Break 1 … 50 dB
--- Bx Main>Center Max +Delta GR 0…24 dB, Off
--- Bx Main>Center Max –Delta GR 0…24 dB, Off
--- Transient Enhance 0 … 10 ms
Table 3-9: MB Attack/Release Controls

Orban OPTIMOD 8685 Specifications

General

Brand	Orban
Model	OPTIMOD 8685
Category	Computer Hardware
Language	English