Some colleagues of mine are running an experiment to find out what you can deduce about a television programme from its signature tune. The experiment is described in more detail in the BBC R&D Blog.
I had a go myself earlier - you have to listen to a number of theme tunes and then answer questions about each one. The questions change from tune to tune - quite a clever piece of experimental design, in that it prevents you from getting into a rut where you're calculating your answers before the music's finished. Hopefully, it will enable my colleagues to train an AI to recognise genre and mood from theme music.
PS - sorry for the lack of posts recently.