XPost: alt.comp.os.windows-10, alt.home.repair, sci.electronics.design   
   From: clive@nowaytoday.co.uk   
      
   On 03/01/2023 02:30, Brian Gregory wrote:   
   > On 02/01/2023 13:48, Rink wrote:   
   >> If you change the wires of one speaker you get a 180 degree   
   >> difference on all audio frequencies.   
   >> If from two speakers at the some radio (left and right), one is wrong   
   >> connected, you can hear that at exactly the middle between the speakers   
   >> where there is a fase-out for all audio frequencies.   
   >   
   > I've never heard an audible null between out of phase speakers. It   
   > usually just ruins the stereo effect, makes it sound almost like two   
   > separate lots of music (or whatever).   
   >   
   With a mono source (ie both channels the same phase) you lose a lot of   
   bass in the centre.  Block one ear and the effect is clearer and at   
   higher frequencies too.   
      
   A long time ago, when stereo records were often mixed with the vocals in   
   the middle and other instruments to the sides, inverting one channel and   
   adding it to the other channel (ie subtracting it) could do a   
   not-too-bad job of removing the vocals for karaoke.   
      
   --   
   Cheers   
   Clive   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)