Piano Sheet Music
Piano sheet music for a thousand or so tangos is readily available at Todo Tango and Mandrágora Tango. When I use printed music for analysis I always go to these sources first. If I find what I’m looking for I enter the notes into MuseScore or Noteflight, to produce a crisp, clearly readable copy. More importantly, for the presentation of my analysis on this site, the tools can synchronize the sheet music and an audio file or YouTube clip. As the music is playing the sheet music is highlighted bar by bar or beat by beat.