I'm new to Chuck but am beginning to build out a toolset for future compositions. I'm a first year Phd student in computer music @ Stanford. I did my b.s. in computer science long ago... I'm attaching two code examples. The first is a sample for using chuck with 4-channel sound output. The second is a composition that uses this technique. The second example is less a composition, more a proof of concept. From it, I hope to create a fugue of engines (including a lawnmower, blowdryer, xbox360, hedge trimmer, and handmixer, and leafblower) . (If you require concrete sound files let me know). I find most composition by tape is arduous and suffers from too many dependencies among the various tools and iterations of output across those tools. As a contrast, I want to create sound-sculptures -- namely, a discrete entity (e.g. a single chuck program) that requires no pre or post processing. Changes to the entity affect the whole. Extensibility, however, becomes built into the structure. If you review the code, the extension to n-channel will seem reasonably straightforward. Jeff