3-50
OPERATION ORBAN MODEL 8685
The control can be adjusted from 0.5 dB/second (slow) to 20 dB/second (fast). Set-
tings toward 20 dB/second result in a more consistently loud output, while settings
toward 0.5 dB/second allow a wider variation of dynamic range. Both the setting of
the 2B
RELEASE control and the dynamics and level of the program material deter-
mine the actual release time of the compressor.
With faster 2B
RELEASE control settings (above 8 dB/second), the sound will change
substantially with the amount of gain reduction in the two-band compressor. This
means that you should activate the gain-riding AGC to ensure that the two-band
compressor is always driven at the level that produces the amount of gain reduction
desired. Decide based on listening tests how much gain reduction gives you the den-
sity that you want without creating a feeling of over-compression and fatigue. For
most applications, we recommend using slower release rates because applications
that could use faster Two-Band release rates are usually better suited to five-band
processing. Five-band processing minimizes the undesirable artifacts that fast release
rates can produce.
The release rate (in dB/second) in the two-band compressor automatically becomes
faster as more gain reduction occurs. This makes the program progressively denser,
Two-Band
Intermediate Name Advanced Name Range
2B Bass Coupling 2B Bass Coupling 0 … 100 %
2B Drive 2B Drive –10 … 25 dB
2B Gate 2B Gate Threshold Off, –44 … –5 dB
2B Release 2B Release 0.5 … 20 dB/second
2B Rel Shape 2B Release Shape Linear, Exponential
Loudness Threshold Loudness Controller Threshold Off, 0.0 … -24.0 dB
Loudness Attack Loudness Controller Attack 0…100%
Loudness Bass Couple Loudness Controller Bass Couple 0…12 dB, Off
--- 2B Master Knee 0 … 50 dB
--- 2B Bass Knee 0 … 50 dB
--- 2B Master Ratio 1:1 … infinity:1
--- 2B Bass Ratio 1:1 … infinity:1
--- 2B Master Break(point) 1 … 50 dB
--- 2B Bass Break(point) 1 … 50 dB
--- 2B Master Compression Threshold –15 … 0 dB, Off
--- 2B Bass Compression Threshold -10.0 … 5.0 dB, Off
--- 2B Master Attack 4 … 50, Off
--- 2B Bass Attack 4 … 50, Off
--- 2B Master Comp Ratio
1:1 … ∞:1
--- 2B Bass Comp Ratio
1:1 … ∞:1
--- 2B Master Knee 0 … 50 dB
--- 2B Bass Knee 0 … 50 dB
--- LFE Threshold –10…+5 dB, Off
--- LFE Attack 4…50 ms
--- Bass>LFE Couple 12…0 dB, Off
--- Master Main>Center Max +Delta GR 0…24 dB, Off
--- Master Main>Center Max -Delta GR 0…24 dB, Off
--- Bass Main>Center Max +Delta GR 0…24 dB, Off
--- Bass Main>Center Max -Delta GR 0…24 dB, Off
Table 3-7: Two-Band Controls
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