brief introduction： RCA audio interface is lotus head, the use of RCA cable transmission analog signal is the most common way of audio connection. Each RCA cable is responsible for transmitting one channel of audio, so stereo signals require a pair of cables. For multi-channel systems, the actual number of channels should be matched with the same number of cables. Stereo RCA audio interface, the right channel is generally marked with red, the left channel is marked with blue or white. What are the common audio inte

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