Auracle is a networked sound instrument controlled by the voice. Users jam together over the Internet using only a microphone. Throughout the development process, the authors experimented with different approaches to interpreting vocal input and facilitating user interaction. This paper outlines some of the tools used to implement and evaluate those ideas, simulate the wide range of activities of Auracle users, and facilitate the development process. Categories and Subject Descriptors D.2.6 [Software Engineering]: Programming Environments – programmer workbench. General Terms Algorithms, Performance, Design, Experimentation, Human Factors. Keywords Auracle, Interactive Music Systems, Java, JSyn, Max/MSP, Network and Control, Open Sound Control, SuperCollider, Transjam, Voice Controlled Synthesis, Wire