Spotify

Spotify Uses a Simplistic UI Design when it comes to the ui on thier player with the bigger icons being the main Playback controls:

• Play/Pause
• Shuffle
• Next
• Previous
• Repeat

Then they use smaller icons for additional features such as:

• Volume
• Lyrics
• Device
• Queue

Apple Music

Looking at Apple Music's player for iOS devices it is very simplistic with very minimal controls with:

• Play/Pause
• Previous
• Next