UI Update
Could you please add a next track and previous button to the player, it is a better use of ux as it stops me from having to press play on a track then scrub through the waveform then go back up to play the next song as this get tiring when scrolling through 1000s of tracks on a monthly basis,
The previous track button will work like the existing track restart button if clicked once and will go to the previous track if double clicked, then the volume slider icon can work as the existing mute button when clicked.