XPost: alt.engineering.electrical, sci.electronics.design, sci.e   
   ectronics.repair   
   From: spam@spam.com   
      
   On Thu, 27 Oct 2011 11:12:00 -0700, DaveC  wrote:   
      
   >>> is it OK to connect 2 computers' sound cards' grounds together?   
   >   
   >> No. You will certainly create a ground loop which will result in mains   
   >> hum.   
   >> d   
   >   
   >This kinda kills the project, doesn't it? (At least, the straightforward   
   >solution.)   
   >   
   >The alternative is...?   
   >   
      
   Transformers. You can buy decent ones in Maplin for use in car audio.   
   Capacitors have been suggested, but they don't help. If they are big   
   enough to pass bass, the ground loop is still there. It doesn't   
   require a DC connection to function.   
      
   d   
      
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