Select source A, then click the source select field and choose Import Audio from the pop-up menu.
In the Import browser window, click the Additive and Formant Import Mode buttons.
Navigate to the Guitars subfolder in the EXS Factory Samples folder, and choose a single guitar sample.
When loading is complete, click the Formant button to the right side of the source A window. Note that the upper Analyzed section is turned on.
Adjust the Shift knob to move resonances up or down in frequency and to change the timbre. Small amounts of Shift variation work well for subtle changes: try a few semitones in either direction.
Play some very low notes, then some very high notes. Gradually turn down the KTrack knob to reduce key tracking for the formant filter, and note the difference when you replay the high and low notes.
Adjust the Size knob value to change the apparent size of the guitar body. Also adjust the Center knob value, and note the effect it has on the tone of the resulting larger or smaller guitar body.
In Alchemy in Logic Pro, click the File button in the Name bar and choose Initialize Preset from the pop-up menu to reset all Alchemy parameters to default settings.
Important: Use of Initialize Preset automatically turns on wide unison mode. See PDF
Logic Pro Instruments: PDF