Depends on what you are connecting to on each side of the converter and what you want to put through it (what type of audio content) and the resulting experience you want to get. In other words, ...

RCA cables started as single-channel connectors for audio, later evolving into stereo sound by adding a second cable. The iconic yellow RCA cable was created for composite video, used widely in VCRs, ...

It was once the most high-tech and futuristic feature you could find: Transmit sound -- with light! Lasers! A cable not of copper, but glass! Except, it was almost never glass, and was usually ...