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3-42
OPERATION
If less gain reduction is used, loudness can be lost. For classical formats, operating
with 0-10 dB of gain reduction (with the gain riding AGC set to O
sense of dynamic range while still controlling levels effectively. Because OPTIMOD-
PC's density gently increases between 0 and 10 dB of compression, 10 dB of com-
pression sounds very natural, even on classical music.
2B REL ("2B Release") control determines how fast the two-band compressor re-
leases (and therefore how quickly loudness increases) when the level of the program
material decreases. This release time only applies when the silence gate does not
gate the Two-Band Compressor.
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 R
control and the dynamics and level of the program material determine
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the actual release time of the compressor. In general, you should use faster release
times for mass-appeal pop or rock formats oriented toward younger audiences, and
slower release times for more conservative, adult-oriented formats (particularly if
women are an important part of your target audience).
We expect that the Two-Band structure will be rarely used for pop music
formats because the Five-Band structure gives better results in almost all
cases.
The action of the 2B R
Its setting is critical to sound quality—listen carefully as you adjust it. There is a point
beyond which increasing density (with faster settings of the 2B R
longer yield more loudness, and will simply degrade the punch and definition of the
sound.
When the 2B R
control is set between 8 and 1 dB/second (the slowest settings), the
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amount of gain reduction is surprisingly non-critical. Gating prevents noise from be-
ing brought up during short pauses and pumping does not occur at high levels of
gain reduction. Therefore, the primary danger of using large amounts of gain reduc-
tion is that the level of quiet passages in input material with wide dynamic range
Two-Band Controls
Advanced Name
2B Drive
2B Release
2B Release Shape
2B Gate Threshold
2B Bass Coupling
Bass Clip Threshold
2B Master Compression Threshold
2B Bass Compression Threshold
2B Master Attack
2B Bass Attack
control has been optimized for resolution and adjustability.
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Table 3-8: Two-Band Controls
ORBAN MODEL 1101
) maintains a
FF
control) will no
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Range
–10 ... 25 dB
0.5 ... 20 dB / S
Linear, Exponential
Off, –44 ... –15 dB
0 ... 100 %
-6.0 ... 0.0 dB
–15 ... 0, Off
-10.0 ... 5.0 dB, Off
4 ... 50, Off
4 ... 50, Off
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