Doc Q7.0
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pF
: Picofarads. You’ll only see it on one parameter, the amp’s BRIGHT CAP value, where it affects treble response.
Phantom Power
: By leveraging an unused pair of copper wires inside of a MIDI or other cable, the Phantom Power
system allows a single cable to carry both MIDI data and power between the Axe-Fx II and a connected floor unit.
Phase
: This term is used to describe the position of one waveform relative to another. When two similar waves are
in phase, their peaks and valleys will line up exactly, reinforcing one another. Waves that are out of phase have
their peaks and valleys in opposition, so while one is headed up, the other is headed down. An LFO Phase control
settings allows left and right sweeps to be either synchronized or offset from one another. An Audio Phase control,
(such as the one in the Enhancer block or the PHASE REVERSE parameters of the Delay, Chorus, Flanger, and other
effects) flips the polarity of an audio signal. (Some might say this turns the waveform upside down.) Combining
two identical audio signals of opposite phase results in complete silence, explaining why you need to be careful
when summing to mono any preset with blocks that invert phase or shift time alignment.
Resonance
: Resonance is an increase in amplitude around certain frequencies. It results in the intensification or
prolongation of certain components of a sound. In the Axe-Fx II, it is most commonly used in descriptions of the
“Q” parameter of a filter or parametric equalizer. At lower values, Q determines the slope of the effect, and at
higher settings, Q impacts the width and height of a peak that forms around the cutoff or center frequency.
RJ45:
RJ45 is a type of standard connector cable end used in computer networking. Both Ethernet and its
ruggedized counterpart EtherCON utilize RJ45 plugs and jacks.
S/PDIF:
S
ony/
P
hilips
D
igital
I
nter
F
ace
Semitones/Cents (“ct” or “cts”):
Used to measure musical pitch. A semitone is one half-step, a.k.a. 1/12th of an
octave—the difference heard from one guitar fret to the next. A cent is 1/100th of a semitone—extremely small in
terms of your ability to hear a difference. You’ll see these units on the Axe-Fx II Pitch Shifter and Synthesizer.
SysEx:
Short for System Exclusive. A type of MIDI data that can be understood only by the particular make and
model of MIDI device that created it. On the Axe-Fx II, it is used for presets, banks, system backups, and User Cab
IR files, and to allow real-time control of the unit via a connected MFC-101 or computer running Axe-Edit (q.v.).
