Planet Background Sound

[jefferiestubes8]

TOS sound FX on home video releases

By the time you get to the DVD, Paramount had already played enough with the original effect to completely change it.

According to ssosmcin and Indysolo the audio track's sound FX on TOS were changed for the home releases.
http://www.trekbbs.com/showpost.php?p=3976832&postcount=62