Paul, can't you do this on a mixer by using the pan knob for maximum music output? On the TDL
Restoration Preamp, this kind of adjustment can be done with the left-side controls.
-- Tom Fine
----- Original Message -----
From: "Paul Stamler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, October 11, 2012 4:04 PM
Subject: Re: [ARSCLIST] What's the best way to remove surface noise on Columbia Shellac (1930)?
> On 10/11/2012 10:36 AM, Doug Pomeroy wrote:
>> A carefully made mono mix (L and R exactly equal) will
>> cancel that part of the the vertical component which is the
>> same in both channels.
> A good way to accomplish this:
> 1. Highlight a representative section of audio and zoom in on it.
> 2. Reverse the polarity of ONE channel only.
> 3. Set up a mono mix and adjust (in preview mode) for MINIMUM signal. By ear is usually best; you
> want as little of the desired audio to be audible as possible. Ideally, you just hear noise.
> 4. Write down your settings, then undo the polarity reversal from Step 2.
> 5. Using the settings you wrote down, mix the whole piece down to mono.