Doc Q7.0
45
PREAMP BIAS
– Sets the bias point of the last triode (not counting the cathode follower). Depending on the
bias points of the previous stages, increasing or decreasing this value can alter both harmonic content and
attack characteristics. Typically, if the previous stage has a
bias then increasing this value will be
more noticeable (and vice-versa). This value is set automatically when amp
TYPE
is changed, but can be
altered any time as desired.
HARMONICS
– Not the type you play with a soft touch, but the type that occur naturally inside an amp as
tubes interact. Higher values increase the interaction between virtual tubes, yielding “softer” distortion.
Amp Dynamic EQ Page (“DYNEQ”)
5.1.7
DYNAMIC PRESENCE
– This models output transformer leakage inductance that results in a brightening of
the tone when the power amp is pushed. This control is set to a default value when the model is selected
corresponding to the real amp, if applicable. Increasing this value results in a brighter response as the virtual
power amp is pushed. When playing softly or at lower gains, the influence of this control is lessened. Note that
this only affects the power amp modeling and is dependent on the degree of power amp overdrive. This
control can also be set negative to cause the tone to darken when playing hard. This control can also be used
to help “dial in” the sweet spot of an amp model. As the
MASTER
is increased an amp becomes more liquid,
compressed and easier to play. However, the highs may get overly compressed, causing the amp to sound too
dark. The Dynamic Presence control allows you to get the desired power amp drive and liquid feeling and then
bring the highs back without affecting the rest of the spectrum.
DYNAMIC DEPTH
– Analogous to the Dynamic Presence control, this increases low frequencies when the
virtual amp is being pushed. While real amps don’t display this behavior, it is a valuable tone-shaping tool .
CHARACTER TYPE, CHARACTER FREQ, CHARACTER Q, CHARACTER AMOUNT
– These
parameters control a powerful “inverse homomorphic” filter which adjusts tone dynamically in a very musical
way. When playing softly these dynamic filters have little effect on the sound. As the amount of distortion
increases, the influence of these filters increases.
CHARACTER FREQUENCY
and
Q
set the center frequency
and width of the filter, while
CHARACTER AMOUNT
sets how pronounced the effect is.
This control is similar to
DYNAMIC PRESENCE
and
DYNAMIC DEPTH
but the frequency is adjustable. For
example, for a tone that darkens when you play harder, set
CHARACTER FREQUENCY
to 10000 Hz and the
CHARACTER AMOUNT
to -5. For the reverse, set 5 and the tone will brighten when you play hard.
CHARACTER AMOUNT
defaults to zero whenever a new amp
TYPE
is selected.
CHARACTER TYPE
determines the type of filter type used, shelving, peaking or dynamic. The “Dynamic” type
can be used to fatten or scoop the tone as a function of picking strength. For example, set the
TYPE
to
Dynamic,
CHARACTER FREQUENCY
to 450.0,
CHARACTER Q
to 0.7 and
CHARACTER AMOUNT
to 4.0 for a tone
that gets fatter and thicker as you play hard but is not “honky” when you play soft.
