IPB

Welcome Guest ( Log In | Register )

S-Sound distortion - what causes it?
slks
post Jun 6 2012, 09:15
Post #1





Group: Members
Posts: 391
Joined: 31-March 06
From: Houston, Texas
Member No.: 29046



This was originally going to be a reply to another topic, but I thought I'd make a new one instead of derailing someone else's. (In case you were wondering why I'm starting in the middle of things and seemingly pulling quotes from thin air!)

QUOTE (jamie_P84 @ Jan 25 2011, 18:19) *
QUOTE (ramicio @ Jan 25 2011, 20:22) *
One thing I noticed with this turntable is with newer records you will get horrible distortion whenever a microphone-kissing artist makes a hard sound like S, F, or T.


In my own collection, all the records made from 1979 onwards are digitally-sourced (apparently due to the introduction of digital cutting delays in the mastering chain). I only bother with vinyl if it was produced prior to this date.


I think that's a rather misguided notion, and here's why -

I've got original pressings of Elton John and Kinks albums (among others) from the 60s and 70s that have this "S"-sound distortion, that also occurs on certain cymbal hits, usually hi-hats. It's very ugly. (Some of my old records are fine, though.)

I also have albums that have been written, recorded and pressed in the digital age, many from the last few years (2008 - 2011). None of them have this distortion.

The newer records were all bought new by me, and have been in my sole possession. The older ones changed hands God knows how many times before they ended up in my collection. This leads me to believe that the S-sound distortion comes from the records being damaged in some way - played on bad/misconfigured equipment, maybe something like the tracking force or stylus angle being grossly off from what it should be? Maybe simply from being played too many times?

I've been wondering since I started collecting what causes records to become distorted in this way. So if someone who knows what they're talking about could tell me, definitively, what causes this type of distortion, I would be very grateful.


--------------------
http://www.last.fm/user/sls/
Go to the top of the page
+Quote Post
 
Start new topic
Replies
cliveb
post Jun 7 2012, 08:22
Post #2


WaveRepair developer


Group: Developer
Posts: 838
Joined: 28-July 04
Member No.: 15845



QUOTE (slks @ Jun 6 2012, 09:15) *
I've been wondering since I started collecting what causes records to become distorted in this way. So if someone who knows what they're talking about could tell me, definitively, what causes this type of distortion, I would be very grateful.

Since you're only hearing this distortion on secondhand LPs, the overwhelming liklihood is that it is groove damage caused by previous mistracking. Mistracking happens when the cartridge setup is wrong (geometry, tracking force, anti-skating, or any combination of the three) and/or the pickup arm bearings are sub-standard and/or the cartridge simply isn't good enough. Many (most?) inexpensive turntables exhibit some degree of mistracking, and when it happens, the stylus loses contact with the groove wall and bounces around uncontrollably, in the process gouging fragments out of the groove wall and thereby damaging it permanently.
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 20th August 2014 - 18:09