Two-channel sound, also known as STEREO, is a type of audio system that uses two separate channels to produce sound. It is the most common form of audio reproduction and is used in many consumer products such as televisions, radios, and home theater systems. STEREO sound creates a more immersive experience by allowing the listener to hear different sounds from different directions. This is achieved by having two speakers, one for each channel, which are placed at different distances from the listener.