...Latest source and releases: https://github.com/kichiki/WaoN
The files here are version 0.10 and are no longer updated.
There is now also a native app for iPhone, iPad and Mac — わおん — Music Transcriber: https://haidoroya.com/waon/
WaoN is a Wave-to-Notes transcriber (converts audio file into midi file) and some utility tools such as gWaoN, graphical visualization of the spectra, and phase vocoder for time-stretching and pitch-shifting.