Should a stereo soundstage be 3D or 2D?


I read several people talking about a “3D” soundstage. The main purpose of stereo is to provide left-right separation between different sounds in a recording (a “wide” soundstage). I understand that when properly set up, there is also front-back separation (a “deep” soundstage). So there are certainly two dimensions. Where is the third? Will a stereo system provide up-down separation as well? What is the technical explanation?

Thanks for the help!
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Showing 1 response by twoleftears

I'm not sure if stereophonic reproduction was ever conceived or designed to provide height cues, but well-set-up, good systems can give some, albeit not as pinpoint or extreme as breadth and depth.  Some speakers are reputed to "do" height better than others; I've had a hard time hearing that.  Find a recording of a flamenco dancer stamping her feet (zapateo) and clicking the castanets high over her head, and report back!!