SPE API定义了很多不透明的数据类型，它们被用作各个api函数的参数。

The SPE API defines a number of opaque data types which are used as arguments to various API functions.

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Nyquist LISP功能强大、高效且可扩展，可为您提供一个良好的预定义数据结构集，用这些结构来表示音频流的各个可参数化的方面。

Nyquist LISP is powerful, efficient, and extensible, providing you with a good set of predefined data structures that represent various parametric aspects of the audio stream.

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