Audio is a simplified everyday word, which is the abbreviation of audio system, that is, a set of equipment that can restore and play audio signals. With the progress of society, people yearn for a more colorful life. Song and dance, as a form of entertainment spread for thousands of years, has penetrated into the lives of people of all ethnic groups.

Key functions of audio

Audio keys vary according to different functions, such as the main power switch button and the volume button. The volume is divided into left and right channels, high and low buttons, frequency division adjustment buttons, bass and treble midrange adjustment, and some stereos also have built-in scene sound effects, such as auditoriums, concert halls, squares and so on.

However, with the development of science and technology, people have higher and higher requirements for the performance forms and venues of song and dance, and the sound system has been constantly improved and perfected with people's needs, from meeting the needs of tens of thousands of people to playing musical instruments and karaoke songs at the concert site.