[mythtv-users] New system spec -- seeking comments.

Mark Greenwood fatgerman at ntlworld.com
Tue Jun 10 19:47:46 UTC 2008


On Tuesday 10 June 2008 19:27:13 Brad DerManouelian wrote:
> On Jun 10, 2008, at 8:24 AM, Robin Hill wrote:
> 
> > On Tue Jun 10, 2008 at 08:10:12AM -0700, Allen Edwards wrote:
> >
> >>> If you have the option for optical into your pre-processor, take it.
> >>> It will eliminate any possible interferrence (hum, hiss, whatever)
> >>> that may occur in the connection.
> >>>
> >>> Kevin
> >>> _______________________________________________
> >>
> >> Interesting input. I have used Coax S\PDIF inputs for years and never
> >> had a problem.  I don't really understand the benefit of optical and
> >> am not sure why people use it, to be honest.  You just need to be
> >> careful of your grounds, make sure they are all the same reference.
> >> You need to do this anyway as you are going to have video connections
> >> that are not optical.
> >>
> > Optical just eliminates any issues with interference over the
> > connection.  However, most systems use very cheap optical parts, so  
> > you
> > end up with added interference/errors in the electrical/optical  
> > conversion
> > process instead.  Overall I doubt there's much in it, unless you're
> > running the connection through a particularly noisy area.
> 
> Optical cables (TOSLink) are great for long runs. Not very common in  
> myth setups, but awfully common in recording studios which is where  
> many of my components once lived. Coax is just as good on short runs.  
> They should perform exactly the same.

Many audiophiles (me included) will tell you that coax usually sounds better than optical over a short run. Usually this is due to the poor quality of most optical cables and optical converters.

Mark

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