Here is a list of the different audio connections to complete the audio/video connection types guide.
1. RCA Connection – This is the most common audio input on TVs and many receivers. Signals are sent over two cables (stereo). Signals are analog and quality depends on the quality of the cable and the equipment.
2. Mini-Plug – (3.5mm) This is the most common output on PC sound cards. It is basically the same format as RCA except it is combined into one connector and cable. Some sets offer a 3.5mm input but it is more than likely that one will need a 3.5mm to RCA cable.
3. Coax Digital – This connection sends signals over a single 75OHM coaxial cable with RCA connectors. It is hard to beat a digital connection. It is the best way to go if you have a sound card with a digital output and a receiver with a coax input.
4. Optical (TosLink) – This connection sends signals over fiber-optic cable using light pulses. Audio quality is virtually identical between optical and coax connections. Optical signals can be sent over very long distances and it is usually cheaper than coax and repeaters.
For more details you may consult this video tutorial:
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