The transition from good singer to fantastic singer is often to do with learning to hear everything that is actually happening in the music and one's voice. Many good singers, riding on large amounts of natural ability, cannot offer their audience the something extra which comes with understanding. For that matter, not all audience members appreciate higher quality either. But studying music formally is expensive, and requires time and effort, so not everyone gets the opportunity. But for those who do, there are a wide range of aural exercises to do with clapping rhythms, identifying intervals, analysing melodies, hearing chord progressions, which will bring out more of their sensitivity and comprehension of music. This will lead to interesting phrasing, variety in colour, ability to harmonise and staying in tune, even when the performer is tired.