38 EnConfiguring playback settings for different playback sources (OPTION menu)■ Signal Info.Displays information about audio signal.ChoicesNoteTo switch the information on the front display, press the cursorkeys (/) repeatedly.■ Vol.Interlock (Volume interlock)Enables/disables volume controls from iTunes/iPhone viaAirPlay.SettingsFORMAT Audio format of the input signalSAMPLING The number of samples per second of the inputdigital signalOff Disables volume controls from iTunes/iPhone.Ltd(default)Enables volume controls from iTunes/iPhonewithin the limited range (1 to 60 and mute).Full Enables volume controls from iTunes/iPhone inthe full range.