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Has there ever been a version of the RGB theme in all it's 80s glory without the intro sound effects?

I think Paul Rudoff might have some fan-made attempts:

https://www.theraffon.net/~spookcentral ... core-album

https://www.theraffon.net/~spookcentral ... imedia.htm

or there are some on YouTube who've tried like:

https://www.youtube.com/watch?v=1glCnR6Oiic

https://www.youtube.com/watch?v=grmnD6Nekzk

Good question, not sure if a 100% clean version ever surfaced...

There's a almost full-length sound-effects free version of the intro theme played during the end credits of The Halloween Door.

Beyond that though, no clean copy of the theme, either with or without John Smith's vocals has cropped up, only versions with sound effects, either from the broadcast episodes or the pilot when it was released on the Time Life set.

Doesn't the pilot have a full version of the cartoon's theme? http://www.ghostbusters.com/node/94

It does, but there's lots of audio effects laid over the lyrics and music.