10.6

Table Of Contents
99Logic Pro Instruments
Logic Pro Alchemy LFO controls
Modulation components are shown only in advanced view. Click the Advanced button to
switch to advanced view.
The LFO module provides a standard Low Frequency Oscillator, such as you might find in
any conventional synthesizer or sampler. There are one or two unusual features, however.
Note: The LFO module has no depth control. The modulation depth is adjusted using the
Depth knob alongside the slot in the modulation rack.
LFO controls
Current LFO pop-up menu and field: Access each LFO control panel by selecting a
number from the pop-up menu or with the Previous and Next arrows. Alchemy provides
up to 16 LFOs—one by default, but more if you create them when assigning modulators.
File button: Open a pop-up menu with a number of LFO-related commands.
Preset submenu: Choose a preset LFO shape. This can be used as is, or as a starting
point for your own shapes.
Save: Save the current LFO settings. A dialog opens in which you can name and save
the file (*.lfo). The new LFO name appears at the bottom of the Preset submenu.
Copy/Paste: Use these commands to copy parameter settings between LFOs.
Clear: Initialize the LFO.
Trigger pop-up menu: Choose On to retrigger the LFO (start from zero) with each
new played note. Off makes the LFO run freely (song start trigger). Voice On/FX Off
modulates voice parameters only, not effects. Also see the Delay, Attack, and Phase
knob descriptions.
Note: Settings from earlier application versions may not behave as expected, because
of the additional trigger option. Change to VoiceOn/FX Off to match the former version
behavior, then resave the setting.
Bipolar button: When on, the LFO outputs negative and positive values per cycle (-50%
to 50%). When off, only positive values are output (0% to 100%).
Shape pop-up menu and field: Choose an LFO waveform from several categories. You
can also step through the available waveforms with the Previous and Next buttons (the
arrows). The chosen LFO shape is shown in the waveform window.
Basic: Common waveforms such as RampUp, RampDown, Sine, Square, and Triangle,
along with two random choices. RandGlide is a constantly fluctuating random
modulator that moves smoothly between random values at a speed set with the
Rate control. RandHold is a stepped random modulator that jumps between random
values at a speed set with the Rate control, holding each value until the next jump
occurs.