Accurate monitoring of cuts

This is where record cutters raise questions about cutting, and trade wisdom and experiment results. We love Scully, Neumann, Presto, & Rek-O-Kut lathes and Wilcox-Gay Recordios (among others). We are excited by the various modern pro and semi-pro systems, too, in production and development. We use strange, extinct disc-based dictation machines. And other stuff, too.

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jjwharris
Posts: 191
Joined: Fri Jun 02, 2017 5:18 am

Accurate monitoring of cuts

Post: # 54170Unread post jjwharris
Tue Sep 24, 2019 2:45 am

Hey,

I've been working on and off trying to cut records over the last few years and one of the biggest obstacles I have found is trying to get a flat and reliable benchmark for the records I have cut.

At the moment I've been calibrating my playback turntable by EQing the white noise from a test record in Fabfilter to flat and using that as a comparison to the original input file. I'm still finding variances between turntables - This is to be expected but they sometimes seem wildly different. Is this the best way to be doing it or am I missing something? What are others using to monitor what they are cutting?
Record Lathe Embossing Supplies - http://www.supplies.johnnyelectric.co.nz/

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Aussie0zborn
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Re: Accurate monitoring of cuts

Post: # 54176Unread post Aussie0zborn
Wed Sep 25, 2019 8:24 am

You might need to specify what you're using - lathe, amps, cutterhead.

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jjwharris
Posts: 191
Joined: Fri Jun 02, 2017 5:18 am

Re: Accurate monitoring of cuts

Post: # 54182Unread post jjwharris
Wed Sep 25, 2019 3:17 pm

Hey, thanks for the reply, the cutting end is entirely custom/made myself eq'd with a daw and powered with a 500w power amp.

Playback is through a Stanton 150 + a generic riaa pre-amp and into a USB interface. I'm trying to figure out the best way to trust my playback really
Record Lathe Embossing Supplies - http://www.supplies.johnnyelectric.co.nz/

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gold
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Joined: Tue Apr 28, 2009 12:03 am
Location: Brooklyn

Re: Accurate monitoring of cuts

Post: # 54186Unread post gold
Thu Sep 26, 2019 5:48 pm

Do you have a cutterhead with electronic feedback? Can you set up a feedback monitor? You need to know what the cutterhead is doing before you can set up the playback. Comparing playback to the source file won't work because what's getting cut is different than the source file. If you don't have electronic feedback the best thing to do is to pick a cartridge which is known to be flat and hope for the best. I've never used a Stanton 150. A Stanton 681EEE was often used as a reference cartridge. The Shure M97E is another popular one these days. I use a Denon DL103. All are pretty flat frequency response wise.

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Greg Reierson
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Re: Accurate monitoring of cuts

Post: # 54195Unread post Greg Reierson
Sat Sep 28, 2019 8:35 am

Test with several carts and shoot for the best average. Don't worry about anything higher than about 15k. A test record like https://www.amazon.com/Ultimate-Analogue-Test-Lp/dp/B001GBA71Y will give you measurable results.
Greg Reierson
http://www.RareFormMastering.com
VMS70 :: SAL74B :: SX74

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