Every time a song touches me, I visualize the sounds.
Sounds and images are so well connected and they have both a strong impact on me that it is almost impossible not to have picutres in my head while listening to music.
That's why the cover of a new album or single is so essential that is has to tranpsort the message and the feeling of those tracks without listening to it yet. Visualizing a track or an album that i love is the best way to describe my feelings when listening to it.
It's also a great way to get people interested in the music, tell them visually what they're going to expect and the people who are interested in the pictures (their style, the colors, the meaning...) will probably be interested in the music, because the transformation of sound into image is done right.