I'm an English major, and Victor Hugo once said: "Music expresses that which cannot be said and on which it is impossible to be silent."
There really isn't much more to be said. Music expresses what words fail to say. It is a universal language. Written word is a visual expression, but even spoken word is limited to the various combinations of 26 letters, jumbled and spewed in every which way. Music, on the other hand, is ever-changing, and does not require interpretation. Music is an almost direct tonal expression of emotion. Where words fail, music speaks.
Words are incapable of capturing the totality of a musical experience. If we could communicate everything with words alone, why would we have a need for music in the first place? Certainly the written word (visual) is a completely different sensory experience than listening; how could the two be remotely compatible? Perhaps the spoken word has a slightly better chance.