For those without a copy of the soundtrack but want to listen along, Disney Music has made the official soundtrack available for streaming on Youtube.
In a movie with so many callbacks to the original trilogy, John Williams made only a few, but very judicious, musical callbacks of his own. As you’d expect in a movie subtitled The Force Awakens, the Force theme (aka “Binary Sunset”) is heard throughout. Han and Leia’s love theme was very prominent, of course. As the Rebel Alliance is now the New Republic, the Rebel Fanfare is now associated with the Millennium Falcon. The First Order isn’t the Galactic Empire, so the “Imperial March” only played once, when Darth Vader’s helmet was revealed.
The new stuff, I agree is top-notch. In contrast to the other Star Wars themes, “Rey’s Theme” doesn’t hit you over the head with its motif from the opening bars. Rather, it develops quietly, slowly, almost tentatively, until it finally emerges triumphantly several bars later. As the movie progresses, and Rey’s character develops, you’ll hear her theme alternate with “The Force” theme. And if you waited until the very end of the credits, you’ll hear both themes played simultaneously.
The Ways of the Force
The Jedi Steps and Finale