See also:

Deleting device
1. Select the “DELETE AUDIO” (type C audio)/“Delete Audio Player” (type D audio) menu. If no devices are registered, “EMPTY” is displayed and the mode changes to the Bluetooth® audio setting ...

Electrical system
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BEEP setting
A beep sound (operation sound) that occurs when the audio system is operated can be set ON/OFF. The initial setting is ON. ...