If a disc error occurs, you may see the following error messages.

USB Commands
USB play
USB play track # (#: 1 to 30)
USB skip forward
USB skip back
USB track random*
USB track repeat*
USB track scan*
USB folder up
USB folder down
USB folder random*
USB folder repeat*
...
Audio System
You can play music from a wide array of media sources. You can also control
the audio system using voice commands. ...