Talk:RIAA equalization

message: An article already existed at this page, created in September 2003 (by me). What happened to it? Where has all the history gone? Graham 02:29, 8 February 2006 (UTC)

message: I've removed a totally misleading section that claimed that some stereo records in Europe (i.e. Decca FFSS) and America (i.e. Columbia Stereo) were not cut using the RIAA curves. I've searching the internet for any claim that could support this, and the only ones come from this product:
AMR PH-77 phono equalizer FAQ
http://www.amr-audio.co.uk/html/faq_ph.html
There is no bona fide technical document that supports the claims (of stereo records not being cut conforming to RIAA) that are shown there. The other "source" of this claim is just a comment on DiscoGS:
http://www.discogs.com/Paganini-Michael-Rabin-Lovro-Von-Matacic-Philharmonia-Orchestra-The-Concert-Voor-Viool-En-Orkest-No-/release/2214757
"This LP is pressed with Decca (FFSS) EQ curve; in order to hear the full glory of this LP, it is best to use Decca EQ curve on the photo amplifier to replay it. If one uses the standard RIAA EQ curve to replay it, the body of the violin will be missing and will sound and edgy. "
I have years of experience with the LP medium (and over 3500 posts in vinylengine.com, mainly regarding technical considerations of LP playback), and have never ever heard about a Decca FFSS (stereo) curve. Known curves are here:
http://www.vinylengine.com/cartridge_database_record_equalization.php
The only non-RIAA curve used on stereo records is the TELDEC/DIN curve. I will add a paragraph regarding it soon.  — Preceding unsigned comment added by Flavio81 (talk • contribs) 20:28, 18 April 2011 (UTC)
thread_title:  Misleading claims about Stereo records 

message: Some years ago, I wanted to see the actual RIAA document that describes the characteristic. I went to the RIAA Web site, and was astonished to find that they (no longer) had such a document! The only info. they could provide was a National Semiconductor application note (for electronic circuit designers) showing how to use an IC op. amp. in a phono playback circuit that included RIAA equalization. While the reliability of that information was decent, it was definitely derivative, and the lack was surely no credit to the RIAA.
Nikevich 06:44, 1 March 2012 (UTC)
thread_title:  The RIAA was a poor source for info. about the curve 

message: About "This also reduces physical stresses on the stylus which might otherwise cause distortion or groove damage during playback.":  I'm suspicious of the source for this.  Actually, there is no stress on the playback stylus, aside from normal long-term wear.  There is a "pinch effect", better known as tracing distortion, that is made worse with increased amplitudes of higher frequencies.  The RIAA curve actually makes this WORSE, not better.  (With care during cutting, RIAA makes the high frequencies better overcome surface noise, without significant added distortion, and therefore is an overall benefit to the sound quality.)  So please find the source and fix this. Ohgddfp (talk) 17:38, 13 September 2012 (UTC)
thread_title:  Stress on Stylus 

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thread_title:  External links modified