Choose the Formant option in the Multimode Filter Type menu.
Click the On button for the Delay plug-in and play a few notes to hear the effect.
Choose any preset from the File menu in the Delay effect interface. Drag the gray scroll bar at the bottom of the Effects section if the Delay effect isn’t visible.
Return to the performance controls, and adjust the Resonance and Cutoff knobs while playing both staccato and held notes.
Drag the blue control points in both XY Pads while striking a note to hear their impact.
Double-click both the Resonance and Cutoff knobs to set them to the zero position.
In Alchemy in Logic Pro, click the Global button toward the upper left to view sources A to D.
You can see that the Analog Bass Sequence preset uses four sources: A, B, C and D.
Click the source select field for both source A and source B, then choose Load VA > Simple > Triangle in each.
Play your keyboard to hear a more mellow synth type sound. Feel free to repeat this step with sources B and C, using different waveforms, or perhaps import a sample.
Double-click the source B Pan knob to center it.
In the central modulation section, make sure the Attack, Hold, and Decay knobs are set to zero, set Sustain to around 80%, and Release to around 0.032. You may also want to experiment with adjustments of the Decay and other knobs in the performance controls section to hear their impact.
Logic Pro Effects: PDF