On Friday, January 31, 2014 11:25:49 AM UTC-8, ScottW wrote:
"Scott" wrote in message=20
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On Thursday, January 30, 2014 7:08:55 PM UTC-8, ScottW wrote:
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On Thursday, January 30, 2014 3:50:43 PM UTC-8, Scott wrote:
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On Thursday, January 30, 2014 10:00:29 AM UTC-8, ScottW wrote:
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Which is irrelevant to my point that a clipped digital signal is one thi=
ng that=20
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would make a brick walled source signal particularly difficult to cut. Y=
ou=20
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still have yet to explain how a cutter filters such a signal.
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Ok...another reference though I'm beginning to wonder if it will matter.
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http://gottagrooverecords.com/vinyl-mastering/
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We work from the assumption that your master is "vinyl ready". We do not=
alter=20
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your audio without contacting you first. That being said, a couple of th=
ings=20
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generally happen when your audio is cut to a master disc. A low cut filte=
r is=20
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used at 40Hz to control and maintain the bass frequency information of th=
e=20
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audio. This keeps the grooves from slamming into one another and helps f=
it your=20
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audio into the space provided by the lacquer disc. A high cut filter is =
placed=20
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around 16Khz to help control high frequency information in the audio. Th=
e vinyl=20
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medium does not "like" a lot of high frequency information. Instruments =
such as=20
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hi-hats, cymbals and tambourines often cause distortion if all high end i=
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allowed to pass through to the cutting lathe. Vocals that contain a lot =
of=20
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"SSSS" sounds (sibilance) will also cause a distorted sound on your maste=
r=20
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recording if not properly treated.
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Our mastering chain is clean and simple, in order to provide the highest =
quality=20
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and least alteration of your sound. We use a classic Neumann VMS-70 cutt=
ing=20
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lathe, which has been an industry standard for over 35 years. All audio =
is=20
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loaded into a specially built computer system that uses professional leve=
l=20
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software and plug-ins. Audio out of the computer is converted to analog =
via a=20
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Lynx II soundcard/converter which supplies clean, uncolored audio for the=
lathe=20
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to cut. The audio is routed directly into the cutting lathe rack from th=
e=20
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soundcard. Our Neumann VG 74 B cutting rack includes a high frequency li=
miter=20
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that helps to reduce the possibility for distortion by compressing certai=
n high=20
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frequency material.
So you found one mastering facility out of how many that actually does "gen=
erally" roll the highs and lows. Still no mention of folding the bass to mo=
no. 1. Who is Gottagroove records? 2. So what? You found one facility that =
"generally" two out of the three things you were asserting is done to the v=
ast majority of records. The RTI webpage that you cited as a reference sure=
didn't support any of your assertions. Nothing at Bernie Grundman's webpag=
e to support them.
http://www.berniegrundmanmastering.c...nical/disc_cu=
t.html I don't see anything at Cohearant either.
http://www.berniegrundman=
mastering.com/technical/disc_cut.html How about Sterling?
http://sterling-=
sound.com/mastering/about/ Nothinin. Now you could talk to the cutting engi=
neers at these, the finest cutting facilities in the world and get their ta=
ke on these things. Or you can cherry pick one facility that was opened in =
2009 and has no track record in the industry.=20
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or a discussion board if you prefer.
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http://www.gearslutz.com/board/maste...astering-guid=
elines-2.html
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Most interesting point in that thread to me is the claim that vinyl can b=
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better than CD...it has to be no more than 6-9 min per side at 45 rpm.
Not even relevant much less a reliable source.=20
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It's clear you don't understand that to have a wave shape the cutter =
can't=20
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handle that wave must have frequency components or levels outside the r=
ange of=20
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the cutter. Levels are always adjusted in transfer from one media t=
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another and there will be at least two stages of filtering to eliminate=
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unacceptable frequency components before cutting.
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Sorry but you are just plain wrong about that. Ever heard of a square wa=
ve? Do=20
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tell me how a square wave has to have a component or level outside of th=
e range=20
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of a cutter? It's the geometry that makes it pretty much impossible to =
cut.=20
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Not the frequency and not the amplitude. So tell us how this sort of wav=
e is=20
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filtered by the cutter.
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The geometry of a sqaure wave is directly related to the frequency conten=
t.