Fishman AURA SPECTRUM DI User Manual page 24

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