Chapter 10. Expressions

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Music is math.

—Michael Sandison and Marcus Eoin (Boards of Canada)

Expressions are cool. You can use them to create amazing procedural effects that would otherwise be impossible (or at least impractical). You can also use them to create complex relationships between various parameters. Unfortunately, many After Effects users are afraid of expressions. Don’t be.

The fact that you’re reading this chapter indicates that you are at least curious about expressions. That’s a good start. By the end of the chapter, you’ll see how expressions can open new doors for you, and I hope you’ll have the confidence to give them a try. ...

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