User Guide

24 Chapter 1 Amp Modeling
 Master knob: Sets the output volume of the amplifier (going to the speaker).
Typically, for tube amplifiers, increasing the Master level produces a more
compressed and saturated sound, resulting in a more distorted and powerful (louder)
signal. High settings can produce an extremely loud output. In Guitar Amp Pro, the
Master parameter modifies the sonic character, and the final output level is set using
the Output parameter below the FX section. (see below for information).
Effects Section
The Effects section contains Reverb, Tremolo, and Vibrato effects. You can choose either
Tremolo (which modulates the amplitude or volume of the sound) or Vibrato (which
modulates the pitch), and use Reverb together with either one, or separately.
Before you can use or adjust an effect, you must first turn it on by clicking its On button
(with a power on icon). The On button lights when the effect is turned on. The FX and
Reverb On buttons are located to the left of the controls for each effect.
Note: The Effects section is placed before the Master control in the signal flow, and
therefore receives the preamplified (pre-Master) signal.
FX Parameters
 FX pop-up menu: Choose either Tremolo or Vibrato from the menu.
 Depth knob: Sets the intensity of the modulation.
 Speed knob: Sets the speed of the modulation (in Hz). Lower settings produce a
smooth and floating sound, while higher settings produce a rotor-like effect.
 Sync button: When turned on, the Speed is synchronized to the project tempo. When
Sync is activate, adjusting the Speed parameter lets you select different musical note
values. Set the Speed parameter to the desired value, and whichever effect you have
chosen will be perfectly synchronized to the project tempo.
Reverb Parameters
 Reverb pop-up menu: Choose one of the three types of spring reverb.
 Level knob: Sets the amount of reverb applied to the pre-amplified amp signal.
Microphone Position and Microphone Type Sections
After choosing a speaker from the Speaker menu, you can set the type of microphone
emulated, and where the microphone is placed in relation to the speaker.
Microphone Position Parameters
 Centered button: When selected, places the microphone in the center of the speaker
cone, also called on-axis. This placement produces a fuller, more powerful sound,
suitable for blues or jazz guitar tones.
 Off-Center button: When selected, places the microphone on the edge of the speaker,
also referred to as off-axis. This placement produces signal a tone that is brighter and
sharper, but also thinner, suitable for cutting rock or rhythm and blues guitar tones.