I'm planning to quit my job because of the music they play at the office.
What will you do after you quit your job?
I'm going to study musical instruments. I love music.
The music they play at the office may bother you but you took on the responsibility of working there. Try to wear earplugs so that the music won't bother you as much.
I just want to quit. I don't want to listen to them anymore.
If the music is that bad, then you should probably talk to your boss about it. Quitting your job seems like such a drastic step when you could try to communicate your problems and find a solution.