some times I gat a cd with a raise circle on both sides. How can I tell the 
different?
----- Original Message ----- 
From: "Walter Ramage" <[EMAIL PROTECTED]>
To: "PC Audio Discussion List" <pc-audio@pc-audio.org>
Sent: Tuesday, September 11, 2007 4:06 AM
Subject: Identifying the playing surface and non playing surface of a CD


> Ok.  Here's the best way to identify the playing surface and non playing
> surface of a CD.  Braille readers will be able to use their finger tips 
> but
> for those who have sensitivity problems use your finger nail but very
> carefully.  Probably the easiest way to do this, if you are doing it for 
> the
> first time  is to place the disc in the case.  From the centre of the disc
> slowly run your finger nail towards the outer edge of the disc.  About 
> half
> an inch from the spindle hole you will find a deep groove, your finger 
> nail
> will pick this up.  This is the non playing surface.  Now if you turn the
> disc up the other way and again slowly and gently run your finger nail 
> from
> the centre towards the outer edge about half an inch from the centre you
> will find a ridge.  Depending on the brand of the disc the ridge will vary
> in how pronounced it is but it is there and It is a ridge.  This is the
> playing surface.  Once you get used to feeling it then you will know at a
> very brief touch which side is which.  Walter.
>
>
>
>
>
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