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On 3/27/2015 10:15 PM, John Haley wrote: > Paul is absolutely right about the curves. Students will never get this > right. It takes a good amount of skill and experience to get the phono-EQ > curve right. There is no research tool that will tell you what is "right." > You have to use your ears, guided by experience. There is no other way > for instantaneous discs. Even commercial discs sometimes involve a lot of > trial and error. > > I strongly recommend getting the KAB EQS MK12, which is an excellent > sounding preamp even apart from its curve settings, and I further recommend > getting the small mod you can buy with it, as I did (it's an extra card > inside), that allows you to input line level signals thru the EQ curve > section of the electronics. Otherwise you can only input the low levels > from a phono cartridge through it. That's impossible once you have > digitized something to a wav file. With this mod, you can do what Paul > says, which is do flat transfers of discs and then play the resulting wav > files thru the preamp to select the right curve, without further playing of > the record. It's also possible yo apply the curves uing, for example, Adobe Audition. A 20dB boost at 50.04Hz, for example, yields a 500.4Hz turnover, while you van do the treble e-emphasis with the Scientific Filters set to 1st order. > Also, if you digitize the records with the wrong curve, it is really, > really hard, maybe impossible, to reverse that to apply the right curve. > This is because you can't reverse the turnover point electronically--it is > not a matter of equalization (which the treble emphasis and de-emphasis > is). Getting the curve right often matters quite a lot in how something > sounds. It's not a small part of the process. > > Frankly, I would never trust a student with any of this. You will destroy > your collection and end up with garbage for transfers. Agreed, 100%. Peace, Paul --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com