A stereo is a device capable of amplifying sound, usually including speakers and amplifiers

It is widely used in various occasions such as homes, commercial places, and entertainment venues. The role of audio is not only to provide music or sound playback, it can also improve music appreciation experience, enhance audio-visual effects, increase the fun of social entertainment, etc. The high-quality sound quality and high-fidelity effect of the audio system make people more immersed in enjoying music, movies, games and other entertainment content. Audio is also an important part of home entertainment equipment, which can create a comfortable music atmosphere for the family and improve the quality of home life. In addition, audio is also widely used in commercial places, such as hotels, restaurants, shopping malls, etc., to provide customers with pleasant music background and enhance consumers' shopping experience. In general, audio is not only an entertainment device, but also an important tool that can improve the quality of life and entertainment experience.