/System/Library/Frameworks/QuickLookUI.framework/Versions/A/PlugIns/Music.qldisplay/Contents/MacOS/Music
The binary is a part of QuickLookUI public framework.
/System/Applications/Music.app/Contents/MacOS/Music
Provides a listening experience that allows users to organize and listen to music, explore new genres, and follow all the latest trends. With the Music App, you can access all your music from Apple Music, iTunes Store, and the iCloud Music Library.