Windows 10 has "Groove Music player" as default Music player. You can also change default music player to any other music player of your choice using below steps:

1. Open Windows 'Settings' App from start menu or by typing 'Settings' in cortana search box, and selecting 'Settings' Windows App.

   

2. In Settings App, select "System" to display System Settings screen.

   

3. In System Settings screen, select "Default apps".

   

4. In "Default apps" screen, click on current music player name below "Music Player" and select your new music player from "Choose an App" selection window.
   You can also search for new music player apps in Windows store by clicking on "Look for an app in the Store".