RE: Re: SOM1 relay board switching sound.

["Amar Nagi" <groups@xxxxxxx>]

i switched both + and -



      -----Original Message----- 
      From: PatrickLidstone
[mailto:patrickl@xxxxxxx] 
      Sent: Fri 23/08/2002 13:18 
      To: ukha_d@xxxxxxx 
      Cc: 
      Subject: [ukha_d] Re: SOM1 relay board
switching sound.
      
      

      Loudspeakers use an AC signal, not DC. There
is no concept of a
      common ground, so you can't switch it that
way.
      
      Patrick
      
      
      --- In ukha_d@y..., "Amar Nagi"
<groups@a...> wrote:
      > i think you need to switch the live
      > 
      >
      >      
-----Original Message-----
      >      
From: justin@g... [mailto:justin@g...]
      >      
Sent: Fri 23/08/2002 13:06
      >       To:
ukha_d
      >      
Cc:
      >      
Subject: [ukha_d] SOM1 relay board switching sound.
      >      
      >      
      >
      >       I
recently purchased a SOM1 relay board
      >       (http://www.phaedrusltd.co.uk/system/index.html)
      >       I
am running 2 sets of speakers connected to a soundcard over
      CAT5 and thought
      >       I
would try switching using the relay board (that's not why I
      bought it though)
      >      
      >       The
wiring uses 4 cores, orange = left, green = right, w/o &
      w/g = ground*.
      >      
When I switch the ground it just goes a bit quieter? Any
      ideas why this
      >      
happens? I thought it would just switch the sound off!
      >      
      >      
Cheers,
      >      
Justin.
      >      
      >       * I
think it probably isn't a great idea to use 2 cores for
      ground & 1 each for
      >      
left/right, but don't know why! I was thinking about
      shielding.
      >      
      >      
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