Hi, I've just published a free software that can recognize notes recorded by an audio input device in real time. It's here : http://davidferaoun.free.fr/eric/zik/voice2midi.php This may interest users (it's can be used freely) and developers if they want to put it into a bigger audio program. There are 2 releases : signed applet and stand-alone. Both work on my PC, but sometimes it seems that the signed applet may cause a browser crash. The source code (in java) is available for download. ( Btw: I use a java FFT library from the online book http://www.cs.princeton.edu/introcs/97data/FFT.java.html but I don't know its license. Sorry ) Best regards, Eric