DAC Converters.

[jjgolden]

In spite of the incredulity which abounds, 800 LPI vintage Scully feedscrews and Paul's 1k LPI land miser are all real. Furthermore, a high number of LPI was only half of the issue which is the actual topic of discussion - compensating attenuators, post console attenuation...

I personally didn't doubt that what you were saying was true. I think we just applied those statements to how useful/practical they are to our day to day cutting jobs.

and the actual topic at hand was D/A Converters in the preview path, no?...


JJG

[gold]

compensating attenuators, post console attenuation...

I can't speak to the LS76 but for the Neumann VMS66/70 this would not fully compensate for tweaking out the calibration with a different maximum base pitch. There are more and finer controls in the PS66 programmer.

[dietrich10]

My brain works in its own weird slightly logical system much like I have my VMS70 setup now...

I split my time cutting 15-25 minute LPs and loud electronic/dance cuts. My speed programmers are tweaked beyond and the initial LPI setting on my pitch box does not really match to what it reads. Where the meter hits when audio is playing is correct.

What I really need is a 2nd 33 rpm programmer so one can be set for loud 10-14 minute sides and the other for the LPs. going from a 26 minute rock record to a 14 minute loud as you can cut house record is an everyday task for me

[opcode66]

Or you need one of my All speed All diameter computer controlled boxes.... The plan is to be able to tweak the settings on screen (instead of trimmers). And, you'll be able to pull up different profiles, so if cutting one style you can pull up one set of values vs. your normal set of values. Interested yet? Also, you'll never have to pull out the programmer again. One programmer for all sizes and speeds!

[dietrich10]

get yours going like that and we talk!

[opcode66]

We are getting closer!

[Braddock]

We use crane song hedd for mod and the new mytek dsd for preview. Looking into the fred frosell D/A. anyone heard that one?

adi

[audadvnc]

I'm using an M-Audio Fast Track Pro. It may not be the highest of fi, but beats most of the original material I'm working with.

I'm confused about some folks' claims of high LPI's with available land. At 400 LPI, the groove spacing is 2.5 mils - subtract 2 mils for groove width and there's only a half mil land available. I've been cutting constant pitch, 4-5 mil groove spacing, and still have to dance around bass excursion issues.

[Serif]

...
I'm confused about some folks' claims of high LPI's with available land. At 400 LPI, the groove spacing is 2.5 mils - subtract 2 mils for groove width and there's only a half mil land available. I've been cutting constant pitch, 4-5 mil groove spacing, and still have to dance around bass excursion issues.

Hi audadvnc,

If your groove width is only 2 mils, isn't your groove depth only 1 mil? I am thinking here that the stylus tip is a vertex on a 45-degree tilted Isosceles right triangle, and the median from that vertex to the groove width's plane is half the length of the right triangle's hypotenuse, yes?

1.06 mils is the minimum groove depth recommended by Scully, fwiw, and this is not for anything but extremely subtle program situations.



- Andrew

[audadvnc]

Serif, of course you're correct. We normally shoot for groove width of 2.6 to 3.0 mil, and widen it further when dealing with program material that has phase angle issues (as seen on some client projects where left and right channel have separate bass tracks - what a headache!)