Within Audacity it is possible to import a sound file and add label tracks to that file. The example below is a track from Il Gattopardo by Nino Rota: the finale.

A .zip file of the Audacity-project (project file and directory with data) can be downloaded with this link: rota il gattopardo finale

il gattopardo audacity chord analysis

There are two label tracks added: one with chord symbols, one with degrees.

Positions can be inserted during playing with CTRL-dot[.] or CMD-dot[.] or on the position of the cursor with CTRL-b or Cmd-b.