10.6

50Logic Pro Instruments
Modify formants in a resynthesized additive guitar sound
1. In Logic Pro, from the Name bar, click the File button and choose Initialize Preset from
the pop-up menu to reset all Alchemy parameters to default settings.
2. Select source A, then click the source select field and choose Import Audio from the
pop-up menu.
3. In the Import browser window, click the Additive and Formant Import Mode buttons.
4. Navigate to the Guitars subfolder in the Factory samples folder, and choose a single
guitar sample.
5. 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.
6. 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.
7. 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.
8. 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.
Modify formants in a resynthesized spectral drum loop
1. In Logic Pro, from the Name bar, click the File button and choose Initialize Preset from
the pop-up menu to reset all Alchemy parameters to default settings.
2. Select source A, then click the source select field and choose Import Audio from the
pop-up menu.
3. In the Import browser window, click the Spectral and Formant Import Mode buttons.
4. Navigate to the Loops subfolder in the Factory samples folder, and choose a drum loop.
5. When loading is complete, click the Formant button to the right of the source A window.
Note that the upper Analyzed section is turned on.
6. Adjust the Size knob value to make the drums seem bigger or smaller.
7. Adjust the Smooth knob value to alter the rate of change for the formant filter. Higher
values smear the timbre of one drum into the next. Lower values exaggerate changes
and create an unusual distortion near the bottom of the knob range.
Create a talking additive sound with synthesized vowel formants
1. In Logic Pro, from the Name bar, click the File button and choose Initialize Preset from
the pop-up menu to reset all Alchemy parameters to default settings.
2. Select source A, then turn off the oscillator in the VA section to the right.
3. Click the Additive button, and turn on the additive section. You will hear an additive
sawtooth sound if you play some notes.
4. As an option, increase the Num Partials value. This helps to prevent the sound
becoming dull if played in lower registers.