
Alchemy source overview in Logic Pro for Mac
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Alchemy sound generating modules are called sources. Four independent sources are available in each preset (A, B, C, and D). Each source has an identical set of components.

Each source provides multiple sound generating elements based on different methods of synthesis. See Alchemy source elements overview in Logic Pro for Mac.
Elements can be turned on or off independently within each source, allowing you to combine synthesis methods. Some elements require a sample import or the creation or import of other content before they can be used.
There are a handful of restrictions on element combinations within a single source. You can circumvent such restrictions when creating your sound by using a different synthesis method (or combination of methods) for each of the four sources.
If you’re new to synthesizers and different synthesis methods, see Synthesizer basics overview.