Reference Guide

TV tuners are mostly standalone, however some video cards also have built-in TV tuners. For more information on using TV tuners, see
the documentation for the TV tuner.
Speakers
Laptops and tablets have built-in speakers for audio output. Desktops also have a built-in speaker. However, they are used only to
produce beeps to indicate errors or failures.
You can also connect external speakers to your computer or tablet. Speakers may support 3.5 mm audio connector, USB, or wireless
connection to your computer.
Speakers are generally categorized by the number of audio channels they support such as; 2, 2.1, 5.1, 7.1, and so on. The digit before
the decimal point indicates the number of channels and the digit after the decimal indicates the sub-woofer.
NOTE: Your sound card and speakers must support 5.1/7.1 channels for producing 5.1/7.1 channel audio.
2.1 Audio
2.1 refers to a system with two speakers (left and right channel) and one subwoofer.
5.1 Audio
5.1 refers to the number of audio channels in most surround-sound configurations. A 5.1 audio system uses five main audio channels
(front left, front right, center, left surround, and right surround) and one low-frequency audio channel.
7.1 Audio
7.1 refers to the number of audio channels in high-end surround-sound configurations. A 7.1 audio system uses two additional
speakers (rear left and rear right) in combination with the 5.1 audio system. For more information on setting up audio, see
Setting up
audio.
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