Overtone is an open source audio environment being created to explore musical ideas from synthesis and sampling to instrument building, live-coding and collaborative jamming.

In this video Sam Aaron gives a fast-paced introduction to a number of key live programming techniques such as triggering instruments, scheduling future events and synth design. Finally, the viewer is shown how a simple musical sequence may be composed and then converted into an intricate Reich phase. The main body of the video was recorded in one take and features an Emacs buffer (using the Live Coding Config (is.gd/‚Äčlive_coding_emacs) for editing text and communicating with Overtone (is.gd/‚Äčovertone), an expressive Clojure front-end to SuperCollider. Clojure is a state-of-the-art functional lisp emphasising immutability and concurrency (clojure.org).