Playback controls should show currently playing track, allow a user to seek through the track, start/stop playback, change main playback settings (repeat mode, x-fade), switch to next/previous track in a queue, change volume, maybe change playback device.
Playback controls should show currently playing track, allow a user to seek through the track, start/stop playback, change main playback settings (repeat mode, x-fade), switch to next/previous track in a queue, change volume, maybe change playback device.