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CHAPTER 3: HOW TO USE X-FDBK
When to Use X-FDBK
X-FDBK is designed for “ringing out” monitor or PA speakers before soundcheck. We don’t recommend using the plugin’s SETUP
function during a live show. X-FDBK has the “smarts” to differentiate between complex harmonic sounds and actual feedback.
But it cannot distinguish between, let’s say, the electric guitar feedback that guitarists love so much, and undesired feedback
from a vocal mic. If the detection engine is active during the show, X-FDBK might be triggered by sounds that you do want
people to hear.
Basic Workflow
X-FDBK is usually inserted on the L/R Master OUT if used for FOH, and on AUX outs if used for monitors.
1. Set up the basic gain structure: Establish the proper relationship between microphone gain, aux send, channel fader,
master out, aux out, and amplifiers.
2. Set the microphone as loud as you can before the system begins to feed back.
3. Activate SETUP on X-FDBK. This activates the detection engine.
4. Boost X-FDBK’s GAIN OUT. Slowly. As you boost the volume, feedback will begin to occur at certain frequencies.
5. X-FDBK will start cutting the ringing frequencies by engaging filters.
6. Add 4-6 filters. Stop the detection engine and restore the GAIN OUT to its default position. Most likely your gain before Feedback
or Headroom will be increased by 3 to 5 dB.
7. Listen to your microphone chain and test it. From there, adjust to your liking.
You can add more filters by running SETUP again or clicking and holding the ADD button to activate the detection engine.
This adds a single filter to the existing curve. You can manually adjust a filter’s parameters — Cut, Frequency and Q — using the +/-
controls. You can also turn a filter On/Off or delete it altogether.