This chapter will discuss the key aspects of instrument development that fall into the category of source-filter models. Commonly placed under the general label of subtractive synthesis, these methods include different ways to define sound generation sources, with different spectral characteristics, and the many types of filters that can shape these. The text starts by looking at various types of broadband generators for periodic and noise signals, followed by an exploration of dynamic parameter shaping. The next section discusses filters in terms of their fundamental characteristics and their application in spectral modification. The chapter concludes with instrument examples demonstrating source-filter synthesis.
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