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Assigning the Wah
As you can see, assigning the Expression Pedal to control a parameter is a very simple process. The most common mistake made when
assigning the expression pedal is failing to access the specific parameter before pressing the Assign button. If for instance you want to assign
the pedal to control the Wah, Step number 1 listed above is to press the Preamp button until you have accessed the Wah effect module. Step
number two can be omitted because there is only one page of Wah parameters. Step number three would be pressing the number 2
parameter button to access the Wah pedal position parameter. Then continue with steps 4 through 7.
Assigning the Morph or Volume
Assigning the Expression pedal to control volume, or to morph between Tube and Solid State Distortion types uses the steps listed above as
well, but you will find the Morph parameter on page two of the Configuration page. So, step 1 is pressing the Effects button which will access
the Configuration page. Step is pressing the Next Page button to access page 2 of 2. Step 3 is to use the number 3 parameter button to access
the pedal function. There are three possibilities for this parameter:
Pre Digital - When the Expression Pedal is set to control Volume, this selection will control the volume before the Digital Effects.
Post Digital - When the Expression Pedal is set to control Volume, this selection will control the volume after the Digital Effects.
Morphing - This selection will allow you to Morph between the Tube and Solid State Distortions of the Preamp.
Rotate the Data Wheel to make your selection. Then follow steps 4 through 7 listed above.
The Digital Effect configuration will make a difference in the way that the morphing function responds in relation to the Digital Effects. The
following block diagrams show the signal flow for each type of configuration when morphing is assigned to the Expression Pedal.
Series
In the Series configuration, the left and right outputs of the Tube and Solid State Distortions get summed together at the output of the
morphing section. A monaural signal is then fed into the Digital Effects which will provide the stereo imagine.
L
R
TUBE
PREAMP
MORPH
DIST
PREAMP
L
L
R
R
+
L
R
TUBE
PREAMP
MORPH
DIST
PREAMP
L
L
R
R
+
FX 1 FX 2
L/R OUTPUT
L/R OUTPUT
FX 1 FX 2
FX 1 FX 2
L
R
TUBE
PREAMP
MORPH
DIST
PREAMP
L
L
R
R
L/R OUTPUT
FX 1 FX 2
L/R OUTPUT
FX 1 FX 2
+
+
L
R
L
R
L
R
Series Configuration
Parallel Configuration
Split/Parallel Configuration
50
RP21D User’s Guide Section Three - Advanced Topics