You can play and control music in the Music app on your iPhone.
While a song is playing, tap the MiniPlayer to open the Now Playing screen.
Do any of the following:
Adjust the volume: Drag the volume slider.
You can also use the volume buttons on the side of iPhone.
Scrub to any point in a song: Drag the playhead.
Navigate to the artist, album, or playlist: Tap the artist name below the song title, then choose an option.
Turn animated album cover art on or off: Go to Settings Adjust the sound in Music on iPhoneUse Siri to play music on iPhone