Is music a concrete noun or a abstract noun?

This Word can be difficult to categorize on whether its a concrete noun or an abstract noun. Certainly Musical Instruments are physical objects we can perceive with our senses making them concrete nouns. But as for 'music' itself, it is a concrete noun when it is written or printed on sheets of paper as well as when it is heard. But music as an art form is definitely an abstract noun since art is a human activity conveying a sense of beauty. And music certainly conveys a sense of beauty when it is heard.