A ‣ Music, musical and musician 
Music is an uncountable noun. We do not use it in the plural.
The band played fantastic
music for more than two hours [NOT
fantastic musics].
Musical is an adjective.
There is a shop on King Street that sells musical instruments [NOT music instruments].
A musician (noun) is a person.
My brother is a very good musician. He plays three instruments.
B ‣ Musical instruments 

C ‣ Playing musical instruments 
Ava plays the clarinet. Her brother plays the drums.
Krishnan is learning the guitar. His friend, Isabella, has piano lessons.
Mia is a very good flute-player. She plays in an orchestra. Her friend, Nuria, is a good trumpet-player.
Lucas is an excellent violinist. His sister is a good pianist.
Can you play a musical instrument?
D ‣ Listening to music 
Charlotte loves classical music. (for example, Beethoven, Mozart) [NOT classic music]
Harper can’t stand opera [dislikes it very much]. She prefers pop music.
I like folk music, jazz and rock.
I often listen to music on the train.
I downloaded some new songs yesterday. Do you want to hear them?
Common mistakes
A band means a group of musicians.
Nuala had a really good band at her 21st birthday party. [NOT ‘a really good music band’]
A concert means an event with music.
We’re going to a concert tonight. [NOT ‘a music concert’]