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Download at googlecode: [cfa.py](http://code.google.com/p/contextfreeaudio/source/browse/trunk/cfa.py) Just a quick prototype. Not very fast nor stable. Requires pyparsing for file loading. Features include pseudo-infinite recursion (to Nyquist), ADSR envelopes, external samples. Currently not very configurable nor documented. I wrote the first six versions in a week as a break from coding my senior design project. usage: cfa.py sourcefile.txt outfile.wav Syntax is very similar to Context Free Art. Significant differences include use of the pipe character for parallelization, rule declarations without first saying 'rule', parenthesis instead of curly braces, and choice of scaling or incrementing inherited variables. Configuration variables include frequency = float amplitude = float harmonic = int loop = time|count duration = float|int fill = new|clone|quiet a, d, s, r = float</pre> Variables are set by variable operation value Where operations is = assign * scale + increment
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