About impromptu
An OS X programming environment for composers, sound artists, VJ’s and graphic artists with an interest in live or interactive programming. Impromptu is a Scheme language environment, a member of the Lisp family of languages. Time plays a major role in the Impromptu environment allowing accurate real-time scheduling of events and code. Impromptu is a dynamic environment designed for the creation and manipulation of running programs in live performance.

Impromptu is a programmable AudioUnit host. A powerful environment for creating AudioUnit graphs of arbitrary complexity with precise programmatic control over individual AU nodes. 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. Many more features.

What’s New in this Version
- Over 150 new vDSP,vImage and veclib functions for direct data processing
- New functions for interoperating with binary data more easily and efficiently (objc:data:*)
- Movie performance has been improved and now supports all QT formats.
- iChat Theater support for remote AV performance (simply drag and drop impromptu into your ichat session for live AV streaming).
- Improved CoreImage filter support (gfx:make-filter gfx:apply-filter and gfx:set-filter-param).
- New opengl functionality (lots of things :-)
- New text rendering support
- New channel mapping AU.