Here are some relatively new references that might be relevant for your work:
Fedorenko, E., Patel, A., Casasanto, D., Winawer, J., & Gibson, E. (2009). Structural integration in language and music: Evidence for a shared system.Memory & cognition, 37(1), 1-9.
Meyer, L. B. (2008). Emotion and meaning in music. University of Chicago Press.
Patel, A. D. (2012). Language, music, and the brain: a resource-sharing framework. Language and music as cognitive systems, 204-223.
Tymoczko, D. (2011). A geometry of music: harmony and counterpoint in the extended common practice. Oxford University Press.
Zbikowski, L. M. (2009). Music, language, and multimodal metaphor.Multimodal metaphor, 359-381.
Rogalsky, C., Rong, F., Saberi, K., & Hickok, G. (2011). Functional anatomy of language and music perception: temporal and structural factors investigated using functional magnetic resonance imaging. The Journal of Neuroscience,31(10), 3843-3852.
Daltrozzo, J., & Schön, D. (2009). Conceptual processing in music as revealed by N400 effects on words and musical targets. Journal of Cognitive Neuroscience, 21(10), 1882-1892.