34
The Editor View
small horizontal line when there is no assignment yet). This reveals a drop-down menu with a list
of possible destination parameters. These
range
knobs are used to specify the amount of allowed
modulation of the corresponding destination parameter. Their range varies between -100 % in their
leftmost position and 100 % in their rightmost position with a value of 0 % when in their center
position. This value represents the maximum possible percentage of variation of the destination
parameter, in terms of its range, around its current value. A value of 100 % therefore means that
the destination parameter can vary over its full range while a value of zero means that its value
will remain fixed. Negative values are used to invert the direction of the variation, in other words
decrease the value of the destination parameter when a positive modulation signal is received and
vice versa for negative modulation signals.
At the top of each macro module is an
Amount
knob which controls the amount of modulation
applied to the destination parameters associated with the macro. These controls are gain knobs
which behave exactly in the same way as those on the
Home
view and described in Chapter 2.3.1.
The range of these knobs vary from -1 in their leftmost position to 1 in their rightmost position
with a value of zero in their center position. The only exception is the the
Modulation
knob which
varies between 0 and 1.
The actual amount of modulation applied to a destination parameter is determined by the mul-
tiplication of the value of the
Amount
knob and that corresponding to the range of the destination
parameter. Since the value of the
Amount
knob varies between -1 and 1, it can be interpreted as a
fraction of the allowed range of the destination parameter. When set to a value of 1, the amount of
modulation applied to the destination parameter will be equal to value set by the range parameter,
when set to 0.5 it will be equal to half the value allowed by range knob , with a value of zero the
modulation will be nil and the value of destination parameter will remain unchanged. The effect
is the same for negative values but the modulation of the value of the destination parameter is in-
verted. Note that the value of the
Amount
know associated with the
Modulation
macro can only be
positive because it is assumed that a vibrato or amplitude modulation effect can only be added to a
sound.
In the case where the
Timbre
macro is mapped to the cutoff frequency of some filters, for
example, the total amount of variation of the cutoff frequency is determined by the value of the
corresponding
range
knob. If set to 0.25 for example, the maximum allowed amount of variation
will correspond to a quarter of the full range of this parameter. When the
Amount
knob is in its
zero position, the frequency remains unchanged but it starts to increase when the knob is turned
clockwise. When the
Amount
knob reaches a value of 1, the value of the cutoff frequency will
have been increased by a quarter of the parameter range, in other words a quarter of the maximum
possible value for this parameter. If the
Amount
knob is set to negative values, the cutoff frequency
will be reduced in a similar manner.
A good way to adjust these parameters is to set the
Amount
knob to its maximum value by
turning it fully clockwise and then adjusting the value of the range knobs to get the maximum
desired amount of modulation effect. The
Amount
knob is then set back to its zero position.
Note that there is a relationship between the
Amount
knobs of the
Macro
modules and those on
the
Home
view. The amount of modulation signal applied to a destination parameter corresponds
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