Tonfall audio library for Flash

Tonfall is “an Actionscript framework to get you started in audio dsp programming within the Flashplayer”. It is “focussed on readability and simplicity than performance optimizations”
http://code.google.com/p/tonfall/

Its author is Andre Michelle, one of the creators of the Popforge library, and of the recently redesigned AudioTool online music studio service: http://burn-studios.audiotool.com/