When we listen to music, electrical waves in our brains tend to synchronise to the tempo. In a recent study scientists recorded the brain waves of musicians and non-musicians as they listened to music. Although the brain waves of both groups synchronised to many rhythms, those of non-musicians did not synchronise to particularly slow music. The non-musicians reported that they could not keep track of the tempo in slow music. This shows that becoming a musician requires an innate tendency for the brain to synchronise to the tempo of any speed of music.