3.5

587MainStage Instruments
A typical via modulation usage would be to increase a pitch sweep as you play at higher
velocities. The harder a key is played, the higher in pitch it sounds—which is ideal for
synthesized tom-tom sounds, for example. To create this routing, you would use an
envelope (Env) as the mod source for oscillator pitch, and Velocity (Vel) as the via source.
Consider the following example:
The default Cut (Cutoff) parameter value is 0.50. No modulation source has been chosen in
either the (blue) mod or (green) via pop-up menu. Both are Off in the image below.
When a modulation source is chosen from the mod pop-up menu (Env1 in the image
below), the ring around the knob is turned on. Drag in the ring to set a value (0.70 in the
example) for the Cut parameter—when affected by the mod source.
Note: Exact values are shown in the help tags when adjusting parameters.
As soon as a modulation source is chosen from the via pop-up menu (CtrlA in the image
below), a movable slider appears on the mod ring. Drag this slider to set the maximum
modulation value that can be reached through use of the via source (0.90 in this example).
The mod and via controls indicate the minimum and maximum values that the modulated
parameter can attain, in comparison to the default value.
In the example, the Cut(off) frequency of the filter is set to a default value of 0.50. The mod
source (Env1) drives the Cut value up from 0.50 to 0.70 during the sound attack phase and
back down to 0.50 during the decay phase.
When the via source (CtrlA) is introduced, the following occurs:when CtrlA is at its
minimum value, nothing changes; Cutoff continues to be modulated between values of
0.50 and 0.70 by the envelope (Env1). A maximum value for CtrlA causes the envelope
generator to vary the parameter between the values of 0.50 (the default Cut value) and
0.90 (the via amount).