10.6

168Logic Pro Instruments
Modulate position with an LFO in Alchemy
1. In Logic Pro, Control-click the Position knob and choose Add Modulation > LFO > LFO1
from the shortcut menu.
This assigns LFO 1 to control the Position knob, and the central modulation section
automatically updates to display the controls for LFO 1.
2. Switch the LFO shape from Sine to Ramp Up, and set the Rate to 2 (measures) to match
the length of the Apple Loop.
Tip: Changing the LFO shape to Ramp Down plays the loop backward by starting the
Position at 100% and moving back to 0%.
3. Click the Bipolar button to turn it off.
When Bipolar is active, the LFO outputs both negative and positive values in each
cycle (from -50% to 50%). When off, only positive values are output (from 0% to
100%). If you play and hold a note on your keyboard, a small dot around the Position
knob indicates its values changing from 0% to 100%. Bipolar is useful for controlling
parameters like pan where 0 is in the midpoint of the knob’s rotation and you want the
value to oscillate around the center.
4. Play C3 to hear the loop at its native pitch but at a tempo that matches the project (110
BPM).
Explore further loop manipulation options in Alchemy
In Logic Pro, explore these additional options with the same loop to get a feel for Alchemy’s
loop manipulation capabilities.
• Turn off Trigger mode to hear the loop position continue to move through the file
only when you play a note. This allows you to create gating and stuttering effects by
rhythmically triggering notes. Try playing a series of very short 8th notes over this loop
to change its feel.