/System/Library/Frameworks/MediaPlayer.framework/Versions/A/MediaPlayer
Use the Media Player framework, which is part of MusicKit, to control playback of the user's media from your app. If your app incorporates music, you can use this framework to search for audio content, such as songs, podcasts, and books, in the user's library. You can then play that content directly or ask the system Music app to play it. For example, a game might give users the option to play their own music while completing a particular game level.