Fishman ACOUSTIC PERFORMER PRO Manual page 13

A C O U S T I C P E R F O R M E R P R O
FRONT PANEL - MASTER SECTION Continued
NOTCH FREQUENCY & NOTCH DEPTH Continued
To get rid of feedback, plug your instrument in, and turn up the Acoustic Performer Pro's Channel and Master Levels until feed-
back starts. Move the instrument away from the speaker. Turn the Notch Depth control fully counterclockwise to the deepest
notch (the "V" setting). Now move the instrument closer to the speaker. When feedback begins, turn the Notch Frequency knob
slowly until the feedback disappears. Turn up the Master Level a bit more. If feedback starts up again, turn the Notch
Frequency a little bit clockwise and counterclockwise until the feedback diminishes again. Set the instrument further from the
Acoustic Performer Pro, preferably several feet away. Turn the Notch Depth control clockwise until the feedback starts again,
and then turn it back a little bit counterclockwise to make the feedback disappear. Now the Notch Filter is properly set to
remove the feedback with as little disturbance to your overall tone as possible.
To get rid of a resonance, plug your instrument in, and turn up the Acoustic Performer Pro's Channel and Master Levels to
slightly higher than normal settings. Play chromatically up and down until you find the note that jumps out. Once you find it, turn
the Notch Depth fully counterclockwise to its "V" position. Now play the resonating note repeatedly or let it sustain, while you
turn the Notch Frequency knob slowly from one end to the other. When the volume of your resonating note drops, you've
zeroed in on it. Turn the Frequency knob a few degrees in both directions to make sure you've really got it in range. Play a few
notes above and below the one that was resonating, and check whether you've cut that one pitch too much. Then turn the
Depth control clockwise to make the notch shallower and bring that note up to an even level with the others. Keep checking
that note against ones above and below it.
Even if you don't have a particular note that jumps out on your instrument, a resonance may occur when you tap the top (espe-
cially on acoustic guitars). Follow the same instructions for getting rid of a resonance, but instead of sustaining a note, thump
your knuckle on the instrument's top.1
R E A R P A N E L - C H A N N E L 1
INST MIC IN
If your instrument is equipped with an on-board microphone, plug it into this input for opti-
mum sound. You can also plug a magnetic pickup into this jack if it has sufficient output
power. Phantom power is available at this input jack. See the section on Phantom Power
for instructions on turning it on.
NOTE: When a plug is inserted into the 1+2 Blend In jack, the Inst Mic In jack and the
Pick-Up In jack are disconnected.
TRIM
If your on-board microphone or pickup delivers an exceptionally high-level signal, requir-
ing that you turn down the front panel Level 1 control to its lowest setting, or if there is a
disparity between the signal strength reaching Channel 1 and Channel 2, then you can
adjust this Trim control to bring down the level of the signal presented to the Channel 1
input circuitry. Turn the knob counter-clockwise to decrease the intensity, and clockwise
to increase it. If you are simultaneously using an on-board mic and a pickup (or two pick-
ups) and are using both Channel 1 and Channel 2, try setting the Trim controls for both
channels in this way:
1. Set the Master section's Level control low (9 o'clock to 7 o'clock). If this isn't loud enough, turn it up as loud as necessary.
2. Set Level 1 and Level 2 to their midpoints (12 o'clock).
3. Play a note or chord on your instrument and adjust the Channel 1 and Channel 2 Trim controls until their outputs are equal,
or are balanced to suit your taste.
ACOUSTIC PERFORMER PRO OWNER'S MANUAL
13