| CPC H04N 21/4396 (2013.01) [G06F 3/165 (2013.01); H04N 21/431 (2013.01)] | 20 Claims |

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7. A display apparatus, comprising:
a display configured to display an image from a broadcast system or network and/or a user interface, wherein an external audio output device is in connection with the display apparatus;
a memory configured to store computer instructions and data associated with the display; and
a processor in connection with the display and the memory, and configured to execute the computer instructions to cause the display apparatus to perform:
determining that the external audio output device supports multiple sound systems, and controlling the display to present a system configuration interface for the user to select a user's sound system configuration;
receiving the user's sound system configuration;
in response to the multiple sound systems supported by the external audio output device not including a sound system same as a sound system configured by the user's sound system configuration, selecting one of the multiple sound systems of the external audio output device and adjusting the user's sound system configuration to use the selected sound system;
determining whether an operation for switching between enabling and disabling states of corresponding sound channels is needed for the selected sound system, by comparing the selected sound system with a preset sound system, wherein the preset sound system is a sound system last used by the external audio output device connected to the display apparatus; and
in response to the selected sound system being not same as the preset sound system, enabling one or more sound channels and disabling one or more sound channels according to the selected sound system; and
after a completion of the enabling and disabling of the sound channels according to the selected sound system, outputting the audio data to the one or more enabled sound channels.
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