| Modifying RIAA playback for 78 rpm/45rpm - Click HERE for Original Thread |
| ashok |
I keep reading that it is possible to get better results with a variable RIAA playback curve for 78 rpm records. What do they really adjust ? I guess it must be the corner frequencies but by how much ?
Is this also applicable to 45 rpm plaback ?
Anyone on this forum who does these things ? Any sites that I can check out with such information ?
Thanks.
Ashok. |
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| sreten |
33 RPM and 45RPM RIAA eq is the same.
78's used lots of different curves.
A MM fitted with a 78 stylus will not be right through a MM input.
Sometimes I think for 78's a ceramic cartridge that does
not require any EQ at all would be the easiest option.
:) sreten. |
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| ashok |
Hi Havoc and Sreten,
Thanks for the info. I think that all I wanted.
It has everything that I was looking for.
Thanks again.
Ashok. |
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| dvautier |
I run the ceramic 78 RPM output right into my sound card. Then I equalize as needed. when I say "as needed" I mean it. The records are wildly different depending on make, model, year and condition.
I have some web pages on this subject. The discussion under technical page may help. hope so.
http://dvautier.home.comcast.net/records/records.htm
:) |
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| hagtech |
| quote: | | What do they really adjust ? |
We adjust the corners and turn frequencies, just as you thought. 78s were recorded with many (dozens) of equalization curves. There are three main inflection points, one at a low frequency (50Hz for modern RIAA), a mid-band (500Hz), and upper (2122Hz). More info here:
www.hagtech.com/equalization.html
and
www.hagtech.com/pdf/riaa.pdf
I don't believe 45s have this problem, they don't go back as far. But don't quote me on that.
jh |
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