Fishman ACOUSTIC PERFORMER PRO Manual page 12

A C O U S T I C P E R F O R M E R P R O
F R O N T P A N E L
M A S T E R S E C T I O N
POWER LED
Whenever your Acoustic Performer Pro is turned on, this LED glows. If, for any reason, you encounter a problem with your
Acoustic Performer Pro (no sound, for instance), always check this LED. If it isn't glowing, then either the Acoustic Performer
Pro isn't turned on, plugged in, or connected to a working AC outlet. (Make sure the power cord is securely plugged in at both
ends. Check the outlet by plugging in something you know works.) If the LED isn't glowing, even if the outlet is okay and the
power switch is on, then turn the Acoustic Performer Pro off, unplug it, and consult your dealer or Fishman Customer Service.
EFFECTS
When you place an external signal processor (also called an effect, stomp box, etc.) into the Master section's Effects Loop, you
can blend the effect with the sounds from Channel 1 (including the Aux/Mic In) and Channel 2 combined. The Effects Loop runs
in parallel with your main signal for best sound quality and lowest noise. Regardless of whether other effects were used on
Channel 1 and Channel 2, the channels' combined sound can be processed by the Master's Effects Loop. Turning the knob
fully counter-clockwise to Dry eliminates any Master Effects Loop effect, while turning it fully clockwise to Wet sets the Effects
Loop's level at its maximum.
NOTE: For the best sound quality and lowest noise, adjust the signal processor's mix control (if it has one) so that its output
contains only a "wet" (effect-enhanced) signal.
LEVEL
Like the Level controls on Channel 1 and Channel 2, the Master section's Level sets volume. However, it sets the overall vol-
ume of everything going to the speakers. Therefore, while Channel 1's Level 1 and Level Aux and Channel 2's Level 2 set rel-
ative levels for those channels, the Master section's Level governs the combined signals, and therefore the overall loudness of
the Acoustic Performer Pro.
NOTCH FREQUENCY & NOTCH DEPTH
These two controls work together to control the Acoustic Performer Pro's Notch Filter. The Notch Filter selectively de-empha-
sizes or cuts a part of the frequency spectrum so that you can tame feedback or cut out other undesirable resonances.
Let's look at how the Notch Filter removes offensive feedback or resonance. Feedback occurs when a frequency is recycled
from the speaker back through the instrument and its pickup. It often creates a squealing or howling sound, and usually occurs
most prominently in one frequency range in any given instrument. Therefore, if you cut that frequency out, or at least bring its
volume down, you slice out the feedback. The same holds true for resonance; some instruments have one particular note that
seems much louder than others, due to the way it vibrates.
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