Microphone to Sound Object

Im playing around with this soundmixer and bytesaray class in as3 which is really awesome by the way but the thing is it can only read the soundspectrum of a sound object. What i want to do is basicly make a visual f the soundspectrum of m microphone. Ive read some pots on several forums and they all say its not possible. So does someone already has a workaround for that or is it really really reall impossible?