Livecoding with impromptu
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This document provides an introduction to the Impromptu livecoding environment. It includes quick facts about Impromptu such as it being an OSX programming language and environment for composers, it using the Scheme programming language, and allowing for on-the-fly programming of audio and graphics. Useful resources for Impromptu like its website and mailing list are also listed. The document discusses Extempore, an open source version of Impromptu that builds on multiple platforms like OSX and Linux. Examples are provided of using Impromptu to play notes, generate chords, and create high notes for a Dmin7 chord.
Livecoding with impromptu
- 1. Introduction to the Impromptu livecoding environment 2011 Libre Software Meeting Strasbourg, France, 9/7/11 Michele Pasin Department of Digital Humanities Kings College, London michele.pasin@kcl.ac.uk www.michelepasin.org/
- 2. Quick Facts #1 1. OSx. Impromptu is an OSX programming language and environment for composers, sound artists, VJ's and graphic artists with an interest in live or interactive programming (developed by Andrew Sorensen, since 2006-7) 2. Scheme. Impromptu is a Scheme language environment, a member of the Lisp family of languages. 3. AudioUnits. Impromptu is a programmable AudioUnit host. Musical material can be precisely scheduled for performance by any AudioUnit instrument node and parameters, program changes and presets can be programmatically changed on-the-fly as well as directly via the AU's user interface.
- 3. Quick Facts #2 4. On-the-fly programming. Write, modify, compile and hot swap custom signal processing code - an ability that allows you to write low level sound synthesis code during live performance. This functionality is designed to interoperate with the AudioUnit signal graph allowing you to freely mix your favorite AudioUnits with custom synthesis code. 5. Graphics. Graphics routines can be applied with the same temporal accuracy as audio material allowing artists to tightly integrate audio and visual components. Eg OpenGL, live video processing, vector drawing routines, image rendering, CoreImage filters, text rendering and quicktime movie support 6. ObjC bridge. Impromptu also includes a bidirectional ObjC-Bridge allowing Scheme to instantiate and call ObjC objects and ObjC objects to call back into the Scheme interpreter.
- 4. Useful Resources :: the website 2. Approach. DJFacet, a multi-result dynamic taxonomies search system
- 5. Useful Resources :: other stuff - Mailing List - Wiki - Google Group
- 6. Extempore: opening up Impromptu - Open Source - Open Platform: Extempore currently builds on both OSX and Linux platforms and should easily port to any UNIX environment. The project intends to also extend to the Windows platform at some point in the not to distant future. - Very recent development.. get involved if interested!
- 7. Example: play a note
- 8. Example: a function that creates chords
- 9. Example: chords function.. with a touch of randomness
- 10. Example: generating high notes for Dmin7
- 11. ... thanks!