Threshold Concepts 5 Music evolves over time. Our notions of what is good and bad music are constantly shifting. The ‘rules’ of music change E.g. atonality. Music is partly a reflection of social norms, tastes, fashions and changing cultural conditions. Music is influenced by other art forms, sometimes relying on them for support E.g. opera, contemporary dance, music videos, film soundtracks etc. New music is often challenging and alienating but, over time, comes to be accepted into the mainstream. Classical music has also been edgy at some point in history.