If you listen closely, you can hear the thump of a heartbeat throughout the song. Bass and keyboards are gradually incorporated with digitally broken lyrics that are replaced mid-song with acoustic guitar sounds and drum beats. Guitar strings soften the song as they are gradually blended in with bass, which reverberates in a steady beat. It's definitely a new sound for Madonna and it works well in Music, although it's not original enough to distinguish itself from Air's tunes. For what I never had.
Music covers a spectrum of styles and is definitely worth purchasing.
It is one of Madonna's best albums yet, if not the best, as it attests to her chameleon-like ability to create remarkable new sounds.