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Internet Message Format  |  1992-12-23  |  764 b 
  1. Path: sparky!uunet!paladin.american.edu!howland.reston.ans.net!zaphod.mps.ohio-state.edu!sdd.hp.com!col.hp.com!cab
  2. From: cab@col.hp.com (Chris Best)
  3. Newsgroups: sci.electronics
  4. Subject: Re: voice-suppression circuits,karaoke
  5. Date: 23 Dec 1992 15:52:32 GMT
  6. Organization: your service
  7. Lines: 8
  8. Message-ID: <1ha200INNls8@hp-col.col.hp.com>
  9. References: <1992Dec23.000104.10686@news.acns.nwu.edu>
  10. NNTP-Posting-Host: hpctdke.col.hp.com
  11.  
  12.  
  13. I can't help you find the company, but here's how they work
  14. (as it was explained to me): any signal common to both
  15. channels is removed, and signals that are different are
  16. left in.  So I guess the song has to be stereo.
  17.  
  18. Since vocals are typically centered in the image, that's
  19. what gets cut out.  Don't know what else does, though.
  20.