Long fascinated by the crossover between music and language, I was delighted to come across a dissertation by Jonathan Pearl entitled Music and Language: The Notebooks of Leoš Janáček. The Czech (or more accurately Moravian) composer was taken by the idea that character was manifest in prosody and strove to come up with melodies for his operatic characters which were true to the music of their speech.
Jonathan Pearl does a much better job of explaining it – either here in the full-length dissertation or here in a shorter version (look for Eavesdropping with a Master: Leos Janácek and the Music of Speech). Very interesting reading!
Illustrating this idea with a single YouTube clip is tricky so instead let me embed a clip of one of Janáček’s most famous non-operatic works – the final movement of his Sinfonietta, conducted here by Pierre Boulez. Listen out for great trumpet section work at 5:00:[kml_flashembed movie="http://www.youtube.com/v/d5QBSMjdIFI?rel=0" width="425" height="350" wmode="transparent" /]