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Doc Q7.0
XFRMR MATCH
– Transformer Match is an extremely powerful parameter that sets the relative output
transformer primary impedance to determine how easily the power tubes are driven into clipping. Higher
MASTER
Volume settings result in a more pronounced effect. Increasing
XFRMR MATCH
causes power tubes to
clip
sooner
. Decreasing
XFRMR MATCH
causes power tubes to clip
later
and therefore the phase inverter and
grid clipping becomes more predominant. At higher settings, the resonance settings on the SPEAKER page of
the AMP block will be more pronounced. For optimum results bring up the
MASTER
until the desired amount
of power amp distortion is achieved, then adjust matching until the character of the distortion is as desired.
The various LF and HF resonance parameters interact strongly with this parameter so be sure to experiment
with those as well when crafting a tone.
XFRMR Grind
– Transformer Grind accurately simulates the effects of dynamic core losses and leakage
inductance in the virtual transformer. Higher values result in more high frequency response and a more
“open” sound. Very high values can yield a raspy, spitty tone common in vintage and/or low wattage amps.
Modern “big iron” amps tend to have low values. Note that the amount of grind you will hear is dependent
upon how hard the virtual power amp is driven and is more noticeable as the
MASTER
is increased. In real
amps this effect is highly dependent on the speaker. Some speaker/transformer combinations exhibit
significant high frequency dynamic boost while other combinations yield almost none. As always use your ears
as the final determinant of the settings that will work best for you.
OUT COMP
–The Output Compressor parameter controls the ratio of a compressor specifically tailored to
reduce the output dynamics of the Amp block. A bar graph beneath the knob shows gain reduction.
COMP TYPE
– (Output Comp Type) - Sets the type of Output compression. The “
Output
” type compresses the
block’s output. The “
Feedback
” type also applies dynamics to the input of the block, so you will get more
distortion as you play harder and less when you play softer or roll back the volume.
The Output Compressor also uses
OUT COMP THRESHOLD
and
OUT COMP CLARITY
in the Advanced menu.
Amp Preamp Dynamics Page (“PRE DYN”)
5.1.6
PREAMP COMP
(“Preamp Compression”) – Determines the amount of compression in the virtual cathode
follower. You can also set the attack time and ratio of this compressor (in the Advanced menu using the
CF
TIME
and
CF RATIO
parameters) or change its
TYPE
(below)
COMP TYPE
(“Preamp Compression Type”) – Selects between “Authentic”, which accurately models the
compression in a tube amp, and “Ideal”, which is an idealized distorting compressor. The idealized type is
more focused and has tighter bass whereas the authentic type is bolder and looser. High gain players may
prefer the ideal type due to its tight character.
DYNAMICS
– Sets the strength of an input dynamics processor that can be used to alter the response of the
amp. When set below zero the amp
resulting in a smoother, less dynamic sound. When set greater
than zero the amp
resulting in a punchier, crunchier and more dynamic sound. Note that extreme
values can have undesirable side-effects such as pumping and clipping.
CRUNCH
– Adds crunch, as in Cap’n...
