The way you describe music here sounds a lot like how Steve Pinker has described music: as a mental equivalent of cheesecake; something that just happens to trigger all the right reward systems (the ones based on our love of patterns and structure, and exploiting the same biological systems we use for language) but isn't necessarily nutritious itself.

However, all evidence points to him being wrong about this, making the mistake of starting with language as the centrepiece and explaining everything around it. Human music likely predates human speech by hundreds of thousands of years, and is strongly tied to social bonding, emotions and motor systems in ways that have nothing to do with the symbolic aspects of language.