DigiTech RP21D Modifiers, Dynamic Filters, Low Frequency Oscillators, Midi Continuous Controllers

RP21D User’s Guide Section Three - Advanced Topics

Parallel

In a Parallel configuration, the left and right outputs of the Tube and Solid State Distortions are summed together at the output of the morphing section. A monaural signal is then fed into both of the Digital Effects chains. The Digital Effects will provide the stereo imagine.

Split/Parallel

In a Split Parallel configuration, the left and right outputs of the Tube and Solid State Distortions are kept discrete. The left outputs of both are fed into the top Effects chain, and the right outputs are fed into the bottom Effects chain. Each chain will provide stereo outputs. The left outputs of both chains are summed together, and the right outputs of both chains are summer together.

See the Preamp Master section on page 19 for more information on panning assignments of the Tube and Solid State Distortions, and the Effect Configuration section on page 24 for more information on selecting a Digital Effect configuration.

Modifiers

A Modifier is a way of varying the value of a parameter automatically through the use of a Dynamic Filters and Low Frequency Oscillators, or remotely through the use of MIDI Continuous Controllers. This can dramtically alter your sound and create some interesting effects. The RP21D includes two dynamic filters, and two low frequency oscillators (LFO’s) which can be asssigned to modify any parameter of any effect. It is also capable of responding to any MIDI Continuous Controller.

Dynamic Filters

A Dynamic Filter will vary the value of the parameter it has been assigned to based on the amplitude of the incoming signal. In other words, you can change the value of an effects parameter simply by how hard or soft you strike the strings. For example, you could assign the Dynamic Filter of a Program to control a chorus level. As the dynamics of the music increase, the chorus becomes less apparent. Ease up on the string attack a little and the chorus increases. ALL IN REAL TIME!

Low Frequency Oscillators

An LFO will vary the value of any assigned parameter, between two pre-determined stop points automatically. An LFO will continuously cycle back and forth between two points at a speed that you designate. In other words, you could assign the Chorus Level to an LFO and the LFO would fade the Chorus in and out continuously. The speed that you set the LFO to operate at will determine whether the Chorus fades in and out gradually, or rapidly.

MIDI Continuous Controllers

A MIDI CC can be anything from an external expression pedal to the mod wheel of a MIDI synthesizer. A value will be transmitted on a specific MIDI CC number (between 1 and 127 and channel pressure). Any parameter within the RP21D that has been assigned to that same MIDI CC number will change its value as the MIDI CC changes value. In other words, you could assign the Chorus Effect Level to a MIDI CC number and your Chorus Level could be controlled by a MIDI sequencer or keyboard.

Assigning a Modifier to a Parameter

The Procedure for assigning a parameter to either type of modifier is as follows:

1.Use the Preamp or Effects buttons to select the effect that contains the parameter you wish to assign. In our example, we want to assign the Chorus Level to a modifier so, press the Effects button until you have reached the Chorus Effect (chorus must be an effect within the Program).

2.Select the parameter that you want to assign. Since the Effect Level of the Chorus is on the second page of Chorus parameters, press the Next Page button to access page two. The Effect Level is preceeded by the number 1 icon so, press the number 1 button to select the FX Level

3.Press the Assign button twice and the display appears something like this:

Avail Link for: FX:Lvl

	2	1	%kHz
			OFF￿msdB
		LINK CHANGED		LINK CHANGED	LINK CHANGED	LINK CHANGED
			COMP	WAH TUBE	EQ GATE
							L/R OUTS
FACTORY USER					#
BANK	5 OF 19 b
PAGE							L/R OUTS

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