EmissionControl2 (EC2) is a precision tool that provides a versatile and expressive platform for granular synthesis education, research, performance, and studio composition. It is available as a free download on all major operating systems.

In this article, we describe the theoretical underpinnings of the software and expose the design choices made in creating this instrument. We present a brief historical overview and cover the main features of EC2, with an emphasis on per-grain processing, which renders each grain as a unique particle of sound. We discuss the graphical user interface design choices, the theory of operation, and intended use cases that guided these choices. We describe the architecture of the real-time per-grain granular engine, which emits grains in synchronous or asynchronous streams. We conclude with an evaluation of the software.

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