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Front Panel Controls (cont’d)
Anti-Feedback Footswitch
Use this search-and-destroy anti-feedback lter in addition to the phase
switch to control feedback during a performance. Aura Spectrum’s
automatic anti-feedback lter can apply up to three separate notch
lters, which are essentially very precise tone controls that reduce only
a small piece of the audio band. When activated, the lter determines
where the offending resonances are and only reduces the frequencies on
which they are centered.
While the anti-feedback control is very effective, it’s best if you spend
some time while setting up before a performance and catch any issues
before you begin to play. With some practice, you’ll nd you can also use
it to “x” any resonant notes that may stand out in a particular venue.
Using the automatic anti-feedback control:
1. Press and hold anti-feedback footswitch for 2 seconds. The tuner
display will ash a “1” to indicate it is searching for the rst feedback.
2. Turn up your volume, then either dampen the strings while tapping
the body or play the troublesome note until the feedback begins. The
lter will automatically identify and eliminate the feedback. The “1” in
the display will light solid as will the “A-F” indicator.
3. At this point, you may continue to turn up your volume as in step 2
to catch up to two more problematic resonances. Each is indicated via a
ashing “2” or “3” during the search, turning to solid lit numerals when
the resonance has been identied.
4. You may tap the anti-feedback footswitch at any time to cancel the
search. The circuit will hold the offending frequenc(ies) in memory until
you repeat the process again.
You may also turn the lter on or off at any time by tapping the foot-
switch. When enabled, the “A-F” lights to indicate the lters are active
and the number of lters being applied will be briey displayed.
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