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Linear Acoustic AERO.qc User Guide
For reference, the crossover frequencies are:
•
Band 1 (Low Bass): 20 Hz - 60 Hz
•
Band 2 (Mid Bass): 30 Hz - 200 Hz
•
Band 3 (Low Mid): 170 Hz - 1.15 kHz
•
Band 4 (High Mid): 950 Hz - 6.1 kHz
•
Band 5 (Brilliance): 5.2 kHz - 24 kHz
While the multiband AGC section allows the number of bands to be varied between four
and seven, five bands has been found to be a good match for television audio. More bands
can be selected if dense processing is desired, and four bands can be used when source
content reliably requires minimal processing.
Adjust Noise Reduction
This menu allows access to the multiband source noise reduction controls. Basically a mul-
tiband downward expander, source noise reduction can be helpful in situations where ag-
gressive processing is desired, but the source audio contains substantial background noise.
Most modern content does not require noise reduction and in general it is recommended
that it only be enabled if necessary. Adjustable parameters are:
•
Dwn Exp Rnge: 0dB to 24dB where 0dB equals no noise reduction. The default is 0dB.
•
B1-B5 Threshold (Band 1 - Band 5) - Adjusts the point at which 2:1 expansion takes
place, and is variable from -90dBFS to 0dBFS. The lower the setting (i.e. the closer to
-90), the earlier the expanders will "open" and stop gating noise. Nominal settings are:
Parametric Eq(ualization)
Three bands of parametric equalization are provided for fine tuning if necessary. None of
the factory-supplied presets use the parametric equalizers, but they are provided to create
notch filters or other effects if necessary. Each filter has a gain control with a +/-12dB
range, a center frequency control that varies from 20 Hz to 22.050 kHz, and a bandwidth
or "Q" control that varies between 0 and 10. Normal default settings for all bands are Gain
= 0dB, in other words bypassed.
• B1-B4: -40dBFS
• B5: -50dBFS
Presets & Processing Adjustment
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