How to bring music 21 library into JUCE environment

I’m a college student trying to develop a guitar plugin helping people to improvise.
Main algorithms are

  1. Find the key and chords of the pre-existed songs on th youtube.
  2. Show them on real time synched in youtube playbar
  3. mark the notes user playing on the display.
    And it seems music 21 has various functions i need, especially key and chord identification.
  • I’m a quite junior level developer.
    Thnak you