Johnson Amplification JM60 - Manual (Page 18)

JM120 Mod/Pitch Effects Group
The Modulation and Pitch Shifting effects group in the JM120 differs from that of the JM60. There are 9 effects to choose from in the JM120,
and there is one additional knob for adjusting parameters in the group. The Mod/Pitch effects group in the JM120 includes Chorus, Flange,
Phaser, Tremopan, Vibropan, Ring Modulator, Pitch, Detune, and Rotary Speaker Simulator. Like the Mod/Pitch effects group on the JM60,
only one of these effects can be used at a time. To select an effect from the Mod/Pitch group, press the Mod/Pitch Select button until the LED
next to the desired effect lights up. The effect indicated is now active. The Mod/Pitch effects may be bypassed by pressing an holding the
Select button down. To disengage the bypass, simply press the Select button again. All of the Mod/Pitch effects in the JM120 have three
parameters that may be edited. The following is a description of each of the Mod/Pitch effects and the available parameters:
Chorus, Flanger, and Phaser
Refer to JM60 Mod/Pitch effect section for information on Chorus, Flanger, and Phaser.
TremoPan
A tremolo is an effect that modulates the volume of the incoming signal at a steady, even pace. The incoming signal will go back and forth,
getting louder and softer. It would be kind of like having a motor on your guitars volume knob which increased and decreased the volume at
an even rate. The TremoPan incorporates an automatic panner with the tremolo effect. The panner shifts the signal back and forth from left
to right.
Speed - The speed knob adjusts how fast the volume will fluctuate.
Depth - The depth knob will adjust the intensity of the volume fluctuation
Level - The Level control adjusts the amount of panning incorporated with the tremolo effect. When the "Level" control is at "1",
this effect is a standard tremolo. As the "Level" control is turned up, the phase difference of the tremolo signal sent to the
two speakers is increased until at "10" the speakers turn on and off alternately creating a panner effect.
VibroPan
A vibrato is an effect that modulates the frequency, or pitch of the entire incoming signal. This will take the whole signal slightly in and out of
tune at a steady pace. The Vibropan incorporates an automatic panner with the vibrato effect. The panner shifts the signal back and forth
from left to right.
Speed - The speed knob adjusts how fast the signal is being modulated.
Depth - The depth knob adjusts the amount of pitch change.
Level - The Level control adjusts the amount of panning incorporated with the vibrato effect. When the "Level" control is at "1", this
effect is a standard vibrato. As the "Level" control is turned up, the phase difference of the vibrato signal sent to the two
speakers is changed so that a full stereo image is obtained at "10".
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Section 2 - Using the Marquis JM60/JM120