10.6

33Logic Pro Instruments
The impulse requires its own envelope, separate from the master or any envelope you
have controlling the comb. The best settings for the envelope depend on the needs of
the sound, but a good rule of thumb is to start with zero attack, zero hold, a very short
decay, zero sustain, and zero release. This provides a quick spike that starts comb
movement and allows the remainder of sound generation be handled by the comb itself.
Tip: The chosen impulse can have a large impact on the tone so it is worthwhile
experimenting with different sound sources. One approach is to import a sample with a
strong initial attack using the Additive import method, then use the Additive Harmonic
effect knobs to adjust the tone. These controls plus comb filtering can provide
numerous fast and easy adjustments, letting you dramatically alter the perceived
hardness, material, and tone of your modeled sound. You can also import a drum loop
and set it to sustain with Continuous Loop mode. Because drum loops typically contain
short bursts of sound that vary in tone, they work well with comb filters.
7. Use the Damp control to reduce ringing or other artifacts in the sound, if required.
Logic Pro Alchemy source elements overview
Source components are shown only in advanced view. Click the Advanced button to switch
to advanced view, then click the A/B/C/D button to select the source you want to edit.
Each source can make use of multiple synthesis elements that operate on different
functional principles. You can use a synthesis method independently, or you can combine
multiple synthesis types by turning on all required elements. For example, you can combine
granular synthesis with virtual analog synthesis, or additive synthesis with spectral
synthesis. Each synthesis method has inherent strengths and weaknesses, making them
more suitable for certain sound types than other synthesis engines. If you are new to
synthesis or are unfamiliar with different synthesis approaches, see Synthesizer basics
overview.
The Additive, Spectral, Pitch, Formant, Granular, Sampler, and VA buttons on the source
subpage show synthesis engine parameters. Not all of these buttons are available for
use at any one time. The combination of active buttons updates to reflect the audio data
specified in the source select field and the import method used, if applicable. See Logic
Pro Alchemy Import browser.
See these sections for detailed information on parameters and functions.
• Logic Pro Alchemy additive element controls
• Logic Pro Alchemy additive element effects
• Logic Pro Alchemy spectral element controls
• Logic Pro Alchemy spectral element effects
• Logic Pro Alchemy pitch correction controls
• Logic Pro Alchemy formant filter controls
• Logic Pro Alchemy granular element controls
• Logic Pro Alchemy sampler element controls
• Logic Pro Alchemy VA element controls