title: Are there any open source software or c# libraries to extract piano chords from polyphonic music file?
body: <p>I'm new to this field, so kindly requesting your help. Are there any C# libraries that could extract piano chords from a polyphonic music file? I want to create a midi file using this piano chords. Is it possible? If you can point me to any open source software also fine.</p>
  
  <p>Thanks in advance.
  Shereen </p>