Audio Processing Library
Since AS3 is a little slow for processing things like Fast Fourier Transforms in real-time, it'd be great to have an ANE to modify Tempo, Pitch and Playback Rate of audio files. Open-source C++ libraries already exist http://www.surina.net/soundtouch/, so it just needs to be converted into a native extension, which distriqt already does so well!
Another useful feature would be Pitch Detection, for music learning apps and instrument tuners.
I've been searching the internet for a possible Pitch Detection ANE and this is literally the ONLY result that had any relevance. If you guys build a Pitch Detection ANE i would literally buy it on day 1.