[78-L] Multiple disc playback, was Removing hiss - yet another idea

[Doug Pomeroy]

Not to put too fine a point on it, but I wrote "signal common to both  
groove walls",
I did not refer to "noise".  Of course only noise which is out of  
phase will cancel
completely in the mono mix.

Doug

> Date: Sun, 14 Feb 2010 09:36:16 +0000 (GMT)
> From: Christopher Steward <chris.1picc at yahoo.co.uk>
> Subject: Re: [78-L] Multiple disc playback,	was  Removing hiss - yet
> 	another idea
> To: 78-L Mail List <78-l at klickitat.78online.com>
> Message-ID: <934858.12181.qm at web23605.mail.ird.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
>
> --- On Sun, 14/2/10, Doug Pomeroy <pomeroyaudio at att.net> wrote:
> From: Doug Pomeroy <pomeroyaudio at att.net>
> Subject: [78-L] Multiple disc playback, was Removing hiss - yet  
> another idea
> To: 78-l at klickitat.78online.com
> Date: Sunday, 14 February, 2010, 3:34
>
>
> The signal which is common to both groove walls is what you get
> when you make a (well-tuned) mono mix!? If it 's any more
> complicated that that, you will have to educate me.
> ---------------------------------------------------------------------- 
> ------------------------------------------------
>
> If only one groove wall has a click, the signal common to the two  
> walls is just the wanted signal, which is obviously desirable.? 
> However, mixing to mono will average out the click to the two  
> (equal) channels. Only if there are?disturbances to the signal in  
> each channel which are equal in intensity but out of phase will the  
> mono signal be 'clean'.
> Chris