10.6

210Logic Pro Instruments
Use the Logic Pro ES1 modulation envelope
The modulation envelope can directly modulate the parameter chosen in the router. It
determines the time it takes for the modulation to fade in or fade out. At its center position
(click Full), modulation intensity is static—no fade-in or fade-out occurs. When set to its
full value, modulation intensity is at a constant level.
The modulation envelope allows you to set either a percussive type of decay envelope by
choosing low values or an attack type of envelope by choosing high values.
Modulation envelope parameters
• Form dial and field: Set a fade-in (attack) or fade-out (decay) time for the modulation.
When set to the full position, the modulation envelope is turned off.
• Int via Vel sliders: Set the top arrow to define the upper modulation envelope limit
for the hardest keystrike (velocity=127). The bottom arrow sets the lower limit for the
softest keystrike (velocity=1). The green bar between the arrows displays the impact of
velocity sensitivity on the intensity of the modulation envelope.
You can simultaneously adjust the modulation range and intensity by dragging the green
bar, thus moving both arrows at once. Note that as you do so, the arrows retain their
relative distance from each other.
Modulate a parameter with velocity
1. In Logic Pro, select a modulation target, such as Pulse Width, from the right column of
the router.
2. Set the Form slider to full, and adjust the Int via Vel parameter as needed.
This results in a velocity-sensitive modulation of the oscillator pulse width.
More interestingly, you can directly control the LFO level if you click the LFO
Amp(litude) button in the right column of the router.
Fade the LFO modulation in or out
• In Logic Pro, drag the Form slider to a positive value—toward attack to fade in the LFO
modulation. The higher the value, the longer it takes for you to hear the modulation.
• Drag the Form slider to a negative value—toward decay to fade out the LFO modulation.
The lower the value—closer to decay—the shorter the fade-out time is.
LFO control with envelopes is most often used for delayed vibrato, a technique many
instrumentalists and singers employ to intonate longer notes.