Operation Manual

4.1 General Functioning of the Interface 29
4.1.4 Inverting a Signal
The different modulation signals acting on the String, Excitator, Body, Termination, and Filter
modules can easily be inverted by clicking on the small button appearing on the upper right of the
corresponding gain knob. The signal is inverted when the button is on (LED lit on and value of 1).
4.1.5 Bypassing a Module
The different modules of String Studio can be turned on or off by clicking on the button appearing
on the right of the module label. A module is active when the button is in its on position or in other
words when it is lit and has a value of 1. Note that when a module is not activated, calculations
associated with this module are not performed, reducing CPU usage.
4.1.6 Resetting a Module and Copying Settings
The modules of String Studio can be reset to their default value by clicking on the down pointing
triangle appearing on the left of the module label and selecting the Default Settings command.
4.1.7 Modulation Signals
Different parameters can be modulated with signals from the Keyboard, LFO or Filter Env
modules. Modulation signals are controlled with gray knobs located below the black knobs corre-
sponding to the modulated parameter. These knobs are in fact gain knobs that are used to multiply
the modulation signal by a certain factor. When these knobs are in their leftmost position, the mod-
ulation signals are multiplied by zero which has the effect of turning off the modulation source.
Turning the knobs clockwise increases the gain factor and therefore the influence of the correspond-
ing modulation source. The modulation signal can be inverted by clicking on the LED located on
the right at just above the knob.
Each modulation knob can control multiple modulation signals. The source of the modulation
signal is selected by clicking on one of the green LEDs located on the right of the line of gray
knobs. The sources are labeled Kbd (Keyboard), LFO, and Env (Filter Env). Each time a new
source is selected, the knobs revert to the setting corresponding to this source.
The Kbd modulation signal is used to vary the value of a parameter as a function of the pitch of
the note played. When the modulation source is turned off (knob in its leftmost position), the value
of the parameter is constant over the whole range of the keyboard and equal to the value determined
by the corresponding parameter knob. Turning the modulation knob clockwise will increase the
value of the parameter in the high frequencies while lowering its value for the low notes. This
modulation is applied relative to the middle C (C3) which always keeps the value fixed by the
parameter knob. For example, choosing a hammer as an excitator, and modulating its stiffness with
the pitch signal from the keyboard (Kbd) will make the hammer stiffer for high notes and softer for