The language for the audio1 . This 5-character language string is formatted as three letters followed by two numbers. The 2-digit number represents the order of the 3-letter language in the service, e.g., eng01 denotes the second English component that is carried in the active service. The unit processes the default language when the preferred language setting is def(in this case. string is 3 letters wide). Note that the language string is converted to lower case automatically when this configuration is to be applied