Automatic synthesizer programming is the field of research focused on using algorithmic techniques to generate parameter settings and patch connections for a sound synthesizer. In this paper, we present the Synthesizer Programming with Intelligent Exploration, Generation, and Evaluation Library (spiegelib), an open-source, object oriented software library to support continued development, collaboration, and reproducibility within this field. spiegelib is designed to be extensible, providing an API with classes for conducting automatic synthesizer programming research. The name spiegelib was chosen to pay homage to Laurie Spiegel, an early pioneer in electronic music. In this paper we review the algorithms currently implemented in spiegelib, and provide an example case to illustrate an application of spiegelib in automatic synthesizer programming research.
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