Toyota Lexusc Owner's Handbook Manual page 406

(i) Changing audio format
"
Controller button Screen switch
1 2
DVD audio only —
Push the "Audio" switch on the screen or the "AUDIO"
button on the controller and the changing audio format
screen will appear.
Each time you touch "Audio" switch, another audio
format stored on the disc is selected.
Push the "Back" switch to return to the previous screen.
AUDIO
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