[78-L] EQ - why bother? - was: stereo/mono and noise reduction

[neechevoneeznayou at gmail.com]

My understanding is that mono-ing a signal eliminates the vertical 
component, and all the noise therein (assuming a laterally recorded 
groove). It does not eliminate the lateral noise. The cartridge can be 
wired thru a switch that reverses polarity of the vertical component. 
This is handy for playing vertical records, you can eliminate all the 
lateral noise. Did I say that right?

I typically start a mono transfer in stereo, because there are other 
tricks to do in the computer to eliminate noise that require a stereo 
signal. In the example of a big click in one channel only, you can copy 
the other quiet channel to the other side. Sounds metaphysical.

joe salerno


On 11/7/2011 5:30 PM, bradc944 at comcast.net wrote:
> Actually, it was more a question of how to best achieve A+B, and I was looking for input&  suggestions on that front...right now the method I am using is mixing-down to mono in CoolEdit (and should I be running double-Y-adapters in the audio chain between the external phono preamp and the receiver instead)... I do have a cartridge set up for verticals that will play back well in stereo mode... is there a cartridge wiring scheme that would effectively make a lateral-only device?
>
> The tuner thing came as an add-on in one of the early responses.
>
> And, yes, with audio reproduction equipment, you will get different 'flavorings' of EQ. It was not so much different from the days of acoustic reproduction (witch-hat cone v floor-standing Opera horn)... it's the stuff of which Stereophile writers dream and drool, I swear...
>
> Brad (ducking and covering for I know the barrage about Stereophile Magazine drivel will be imminent!)
>
> ----- Original Message -----
> From: David London<jusmee123 at gmail.com>
> To: 78-L Mail List<78-l at klickitat.78online.com>
> Sent: Mon, 07 Nov 2011 23:02:11 -0000 (UTC)
> Subject: Re: [78-L] EQ - why bother? - was: stereo/mono and noise reduction
>
> I believe it cancels noise because noise mostly creates a pulses in one
> channel of the pickup cartridge in one direction, and  equal and opposite
> pulses in the other channel.  When you connect left and right channels
> together, the electrical pulses cancel each other.
>
>
>
> On Tue, Nov 8, 2011 at 7:52 AM, Rodger Holtin  wrote:
>
>>
>>
>>
>>
>>
>> The original question was how and why does A+B mono work to cancel noise,
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-- 
Joe Salerno