The fact that Gregor wishes to enjoy the violin music Grete plays symbolizes his love of music. This is one of the human pleasures and feelings that Gregor still possesses. He has others, such as the desire to be loved, and that of not wanting to be a nuisance. However, many other things have changed. For example, Gregor does not enjoy the same food he enjoyed before. This shows that Gregor's transformation is not only physical, but psychological.
