It "worked" in an old version (that used a different audio library), but it was really difficult to pull off. You basically had to have perfect pitch. 
Hmm, not possible to latch onto certain thresholds to make it a bit easier? If you took out sharps and just kind of hovered around A,B,C,D,E,F etc. it might be a bit easier...
But then, is it really necessary? :p