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From: Patent Tactics, George Brock-Nannestad

Hello,

Lou Judson wrote:

> I had a similar thought at the recent mention of a "vinyl cutting  
> lathe" - you canot cut on vinyl! Duh.

----- well, you can. You can cut most plastic materials and metals. It is a 
matter of adjusting your lathe correctly, correct speed and angle. If your 
speed is tied - as it is in recording, then your vertical cutting angle 
becomes very critical. The best example of cutting metal is the DMM or Direct 
Metal Mastering. However, in reality the cutting stylus chatters--at the 
intended frequency of ca. 70kHz when you cut copper. I tried it on my 78rpm 
lathe, using an original DMM master, and my steel cutting stylus chattered at 
ca. 7kHz - completely useless under the circumstances. I have cut a CD with 
success.

> 
> But in the Princeton piece, I have a feeling it is sloppy writing and  
> editing, not the prof's words. But she should have been able to vet  
> it and make corrections!

----- I agree completely!

Kind regards,


George

> 
> <L>
> Lou Judson o Intuitive Audio
> 415-883-2689
> 
> 
> On May 4, 2009, at 2:10 PM, George Brock-Nannestad wrote:
> 
> > ----- now, has prof. Thompson really had access to a vinyl pressing  
> > of this
> > record? Or is it just one more example of the sloppy notion that  
> > everything
> > black must be vinyl - that's what our parents had.