Fishman AURA User Manual download pdf (Page 16)

Why a Phase Switch on the Parameter Knob?

A Sound Image is created from an actual microphone in front of a guitar. So the distance of the mic from the instrument and the polarity of the mic

capsule will contribute to relative phase of the signal. Because the Aura blends a Sound Image signal with a pickup signal there is a 50% chance that the

two will clash. The clash will manifest itsef as a loss of bass response, shrill treble, and a generally anemic tone. The phase switch located on the

parameter knob simply lets you put the pickup and Sound Image into agreement. The method for setting the switch is simple: set the Parameter knob

to “Phase”, toggle the Data knob and listen. The “correct” position for the switch is the one that produces the strongest sound.

How to use the Phase switches:

1 Start with the Edit/Play switch in the Play position and select a program. Make note of the number of the program and move the switch

to the Edit position.

2 Turn the Parameter knob to Blend and turn the Data knob clockwise until the letter A (Aura effect only, no pickup) appears in the display.

3 Raise the Output Level.

4 Play your instrument and flip the Phase slide switch back and forth. The desirable position for the switch is the one where the

instrument and speaker work in agreement together and feedback is minimized. Note: If you change your position, you may also need

to change the position of the Phase switch to maintain the positive relationship between the instrument and the speaker.

5 Turn the Parameter knob back to Blend and adjust the Data knob counter-clockwise until the number 4 (50% Aura effect, 50% pickup)

appears in the display.

6 Turn the Parameter control to the Phase position (Pickup phase).

7 Play your instrument, turn the Data knob clockwise (1 on the LED Display), then counter-clockwise (0 on the LED Display). Listen to

the differences in sound quality and choose the position that sounds the most natural with the strongest bass.

8 Move the Edit/Play switch to the Play position to commit the pickup phase switch setting to the program.

Play Mode

Edit/Play Switch

Move the switch to Play and the numbers in the LED display will refer to the 50 program locations

available in the Aura's memory.

Programs

There are 50 available program locations in Play. To move through them, use the Program Change

footswitches or the Data knob. Any one of the program locations can be assigned to any of the

parameters in Edit. For demonstration purposes, we factory load the first 16 program slots (01-16)

in Play mode with the corresponding sequence of Aura/Pickup mixes from Edit- Parameter, Select

(P1-P4, 01-12). You can alter or edit any of these mixes at any time. Program locations 17-50 come

from the factory configured with the Select parameter set to “oF” which means that only the

unprocessed pickup signal appears in the “Aura” side of the blender.

Aura

™

Acoustic Imaging Blender

Inner Workings - continued

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Fishman AURA User Manual Page 16

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