This compilation/composition documents nearly a decade of work that began with the recording of dense sonic environments, both ‘natural’ and urban. Talking Drum is an interactive installation made with four networked laptop computers programmed to explore cyclical polyrhythms in large acoustic spaces. While the performance of the entire system is synchronized by one computer, each computer station generates independent results using genetic-programming algorithms which are affected by acoustic musicians’ performances. Each station in the space “grows” its own rhythmic response to the situation, like similar plants growing differently in adjustment to their locations in an environment. The musicians improvise with the rhythms, interacting with the response of the computers they play next to, and the whole is a quartet of these human-machine duets.