Hi there,
I have just created a 3D / 2D sound spectrum engine for AS3 that is powered by Flint and PV3D called DingX. Makes it very easy to create a sound visualizer in 3 lines of code! Do visit / feel free to use it. DingX’s website can be found here: http://joeltong.org/dingx/. Thanks and do leave comments! xD
Rgds,
Joel Tong