From: owner-basia-digest@smoe.org (basia-digest) To: basia-digest@smoe.org Subject: basia-digest V8 #190 Reply-To: basia@smoe.org Sender: owner-basia-digest@smoe.org Errors-To: owner-basia-digest@smoe.org Precedence: bulk X-To-Unsubscribe: Send mail to "basia-digest-request@smoe.org" X-To-Unsubscribe: with "unsubscribe" as the body. basia-digest Sunday, November 30 2003 Volume 08 : Number 190 Today's Subjects: ----------------- Re: CDs ["Paxety Pages" ] Laser Vinyl Turntable [Lipman_Larry ] Re: Laser Vinyl Turntable [greyfell@gns2000.com] ---------------------------------------------------------------------- Date: Sat, 29 Nov 2003 10:56:53 -0500 From: "Paxety Pages" Subject: Re: CDs I lived in eastern North Carolina in the early 90s - it's the most humid place I've ever been. I have several CDs that I bought when I lived there that have the mold problem. None of the CDs I've bought while living in other places, including here in Florida, have it. I guess either the CDs made in the early 90s were defective, or extremely high humidity caused the problem. So far, it has not affected playing the CDs, only the looks. un abrazo, juan *********** REPLY SEPARATOR *********** On 11/27/03 at 6:25 PM Lipman_Larry wrote: >Happy Thanksgiving all! >CDs don't really "wear out" as vinyl did. However, there has been some >discussion of "laser rot" whereby the repeated "heat" of the laser might >deform the pits and lands which reflect the laser light and create the >pattern of "1s" and "0s" that are translated into audio. There has also >been some discussion of mold creeping into the "pancake" of layers in >discs not manufactured properly, though I haven't heard of either in a >long, long, long time. Discs made in a factory are fairly safe for >archival purposes, and I believe home-burn CDs should last 50 years if >handled properly. (NARAS and AES can accurately answer those questions >for sure.) What is likely happening is that the abrasion from sliding >the CD across the jewel case/player load edge/etc is causing damage. >I've also had some home-burn CDs rendered into coasters because the >"business" ("silver") layer stuck to the inside of a non-tyvek sleeve. > LL > >At 12:15 AM 11/26/2003, you wrote: > > From: "JC" > ...I just bought a duplicate set of Basia cds because > a couple of mine are showing signs of extreme wear. Whoever said cds > don't > wear out was incorrect... > > jan ------------------------------ Date: Sat, 29 Nov 2003 15:19:50 -0600 From: Lipman_Larry Subject: Laser Vinyl Turntable Actually, the laser-vinyl turntable technology has been around for awhile. I remember sharing the information with my classes over a decade ago. Apparently, a laser is aimed at the grooves in a vinyl album and depending on how the light is reflected, can interpret that back as audio. I think the Smithsonian or Library of Congress was looking at the technology at one time for archival and preservation purposes. Here is a link to one company that makes this stuff - there may be others: http://www.elpj.com/ LL At 12:15 AM 11/29/2003, you wrote: Date: Fri, 28 Nov 2003 07:45:54 -0600 From: "tom,kelly&jordan" Subject: off topic Hi, I do not know the company name but at the Consumer Electronic Show there will be an unveiling of laser based record player. Hmmm. No direct contact with the disc. how the hell??????? Tom ------------------------------ Date: Sat, 29 Nov 2003 13:53:26 -0741 From: greyfell@gns2000.com Subject: Re: Laser Vinyl Turntable An engineer for Lockheed told me about this technology in 1977. It appears = = laser compact disk technology got to market quicker. Stephen - ----- Original Message ----- *From:* Lipman_Larry *To:* basia@smoe.org *Sent:* Sat, 29 Nov 2003 15:19:50 -0600 *Subject:* Laser Vinyl Turntable Actually, the laser-vinyl turntable technology has been around for awhile. I remember sharing the information with my classes over a decade ago. Apparently, a laser is aimed at the grooves in a vinyl album and depending on how the light is reflected, can interpret that back as audio. I think the Smithsonian or Library of Congress was looking at the technology at one time for archival and preservation purposes. Here is a link to one company that makes this stuff - there may be others: http://www.elpj.com/ LL At 12:15 AM 11/29/2003, you wrote: Date: Fri, 28 Nov 2003 07:45:54 -0600 From: "tom,kelly&jordan" Subject: off topic Hi, I do not know the company name but at the Consumer Electronic Show there will be an unveiling of laser based record player. Hmmm. No direct contact with the disc. how the hell??????? Tom - ---------------------------------------------------------------------------= = - ------------------------- This email was brought to you by GNS2000.COM! ------------------------------ End of basia-digest V8 #190 ***************************