////I'm not convinced those recordings are genuine. For example, why is Uranus stereo? It sounds like late 60s - early 70s Moog to me - I spent years making noises like that.////

To my knowledge, these are real. But a fake could be synthesized but yu'd probably not know the difference. The first Saturn clip was obviously fake. But many of these are available on CD to the public so they're not hard to get hold of.

As for stereo, go to the sferics link I posted and note that one of the examples of sferics recorded there is in stereo. We have the technology. We can record them louder. Crisper. Better than before. (that's from the 6 million dollar man in case you didn't know)