HDMI combines video and audio interfaces into one connection, which simplifies the installation process of a home-entertainment system. The digital cable also substantially improves the quality of the picture and sound for everyone by providing the first standardized compact interface for transmitting this digital data in an uncompressed format.Inside HDMI cables are conductors for both the audio and visual components. Both audio and visual components also have an audio return channel, which increases the speed and efficiency of their signals. Most conductors and the solder used to meld the conductors and connectors together are composed oxygen-free, high-purity copper, although some use silver as a solder. The best HDMI cables are future-proofed for technologies just on the horizon. The cables have standardized the uncompressed, audio-visual digital connection. They are used by many electronics devices today and have improved the picture and sound experience for everyone.