First, you can write a note which avoids the awkwardness of in-person conversation. If the note doesn’t work, you can knock on the door and politely ask whether they can turn down the music. Then, you can try to contact the leasing office or any other third-party management company to deal with the situation. Further, you can call the police if they still go on and on playing loud music. The last resort is breaking the lease and moving to a quiet community or an apartment with noise and sound ordinances.
The information in this answer is general in nature and is not legal or insurance advice for your specific situation. Policy language varies carrier by carrier; your declarations page is the final word. If you're unsure, call your agent before you need to file.