Polyphonic Piano Audio to MIDI Transcription

For algorithm explanation see Python version:

https://github.com/BShakhovsky/PolyphonicPianoTranscription

The Python code from above is translated into pure C++ here, in order to make this C++ static library available from my 3D-piano application:

https://github.com/BShakhovsky/PianoTranscription_Windows

Python neural network is converted to C++ with the help of the following library:

https://github.com/Dobiasd/frugally-deep

C++ code related to spectrogram etc. is blindly coppied from the following Python-library:

https://github.com/librosa/librosa