As vividly as you can, pretend the song is playing. Try to focus your complete attention on the music you are listening to in your imagination. Practice this until it seems as if the music is really playing. Again, try for as much realism as possible. JH says when you can imagine the music clearly, the music can easily turn into the vibrations, and you can easily escape your body.
Some people are better at using their imaginations with sound rather than pictures.
Try both and see which works best for you.