dbx DriveRack Studio User Manual page 20

Section 1
• These types pertain to the Q, sensitivity, and algorithm type. The filter is established by using
• You are now prompted to raise the output gain of the mixer to the level of the performance.
• To return to program mode, simply press the <PROGRAM> or <NEXT PG> button. For
DriveRack Studio User Manual
10
Getting Started
the formula: Q= Freq divided by Bandwidth. This means that a higher Q will produce a fil-
ter that is more narrow. Values are: Speech (Bandwidth = 1/5 octave and Q=7.25) Music
Low (Narrow notch filter, Bandwidth = 1/10 octave and Q=14.5), Music Medium (Very
Narrow notch filter, Bandwidth = 1/20 octave and Q=29) Music High (Ultra Narrow notch fil-
ter, Bandwidth = 1/80 octave and Q=116). To guarantee that feedback is suppressed at
lower frequencies, the AFS may place wider notch filters at these lower frequencies (below
700 Hz). Once the desired fixed type has been selected, press the <NEXT PG> button and
the display will read:
Slowly Increase the
mixer gain to
desired level.
F F F F F F L L L L L L
Note that you are raising the mixer gain without an input signal running through the mixer.
Once the desired level has been set and all of the fixed filters have been assigned, the unit
will automatically move you to the page that indicates the fixed filter setup has been com-
pleted. If you have reached the performance level setting and all of the fixed filters have not
been used, you may want to return to the page that selects the number of fixed filters and
re-adjust the number of fixed in order to provide you with additional live filters. Regardless,
once you have completed the setup, the display will read:
AFS
Fixed Filter Setup
Done
F F F F F F
more information regarding feedback elimination, please see the AFS parameters of the
Detailed parameters section.
DriveRack
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Studio
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