"Ghod" <ghod@[EMAIL PROTECTED]
> wrote in message
news:fqi1h00aov@[EMAIL PROTECTED]
> "Vinyl Rules!" <timbritt@[EMAIL PROTECTED]
> wrote in message
> news:fotrl202kdv@[EMAIL PROTECTED]
>> On Feb 9, 11:17 am, squirr...@[EMAIL PROTECTED]
wrote:
>>> I've just acquired a Pro-ject Debut III and Pro-ject Speed Box whose
>>> sole purpose will be to sit near a PC for digitizing purposes. I need
>>> a not-too-expensive RIAA preamp to connect the turntable to the M-
>>> Audio card in the PC.
>>>
>>> The leaders in the clubhouse are the Project Phono Box II (~$125) and
>>> the TDL Tech 403/409 (~$200). I'm leaning toward the TDL because the
>>> (fixed) gain in the newest Phono Box may be a little too high for
>>> recording purposes.
>>>
>>> Any comments on either of these devices or recommendations for
>>> alternatives?
>>
>> I like the idea of a used vintage pre-amp as you can incor****ate it
>> into your stereo or A/V system if needed and likely have a much better
>> preamp than comes in most A/V receiver today.
>>
>> However, since you are going to archive your vinyl, please let me
>> gently suggest you DO NOT ARCHIVE on CR-R or CD-RW media: Archive on
>> an external hard drive, and keep your vinyl in climate controlled
>> storage.
>
> Archive? I'd expect that anyone going to the effort of transferring
vinyl
> to a digital medium isn't doing so to "archive" the vinyl...the vinyl
> itself
> is far and away the best means to "archive" that audio. The real point
to
> this transfer is to allow playback on ****table devices (iPod, ferex),
not
> as
> an archive.
>
>> Why? Because virtually all consumer CR-R's and CR-RW's use a "dye-
>> sublimation" process to burn the pits into the disc.
>
> I don't wish to seem rude here, but it really bothers me when someone
> displays their ignorance in such an egregious manner.
>
> JFGI.
>
> http://www.imation.com/products/cd-r_media/la_cdrw_technology.html
"In
a
> CD-R, the recording layer is made with organic dyes - greenish cyanine
> dye,
> golden phthalocyanine dye, or silver-blue azo dye, depending on the disc
> manufacturer. While there are differences among the dyes, the
differences
> are probably most im****tant to chemists, not to CD-R users. Each dye's
> quality is such that which dye is used makes no difference for disc use
> and
> life.
> The laser of your CD-R/CD-RW drive heats the dye to a temperature of
about
> 200° C, irreversibly melting a pitted pattern into the recording layer.
A
> plastic layer alongside the dye expands into the newly available space,
> creating a pit pattern similar to that of a conventional CD. Your CD
> player
> reads this highly reflective pattern for playback. Because the plastic
> layer
> melts into the dye layer to set the pattern, CD-R discs cannot be
> re-recorded.
>
> CD-RW Technology
> Unlike CD-R discs, a CD-RW disc can be reused - in fact, up to 1,000
times
> with current discs, and perhaps even more with upcoming media
> improvements.
> However, older computer CD drives and audio CD players cannot read CD-RW
> media.
>
> In a CD-RW disc, the recording layer is made of an alloy of silver and
> other
> metals - indium, antimony, and tellurium. Out of the case, this layer
has
> a
> polycrystalline structure. When you record to the CD-RW, your CD-RW
> drive's
> laser selectively heats tiny areas of the recording track to a
temperature
> above the layer's melting point (500 - 700° C) - a much higher heat than
> the
> laser in a CD-R recorder can reach.
>
> The energy delivered by the laser beam melts the crystals in the heated
> areas into a non-crystalline phase - also known as "pits." These pits
> reflect less light than the remaining crystalline areas, creating the
> playback pattern for your Multi-Read CD-ROM drive or specialized audio
CD
> player."
>
>> This means the
>> laser is burning pits into a coloured dye substrate layer, not a
>> metallic aluminum substrate layer that is used in commercial CD's and
>> DVD's.
>>
>> No computer CD or DVD burner has a laser powerful enough to burn pits
>> into aluminum, so the industry adapted the "dye-sublimation" process
>> for the low-power lasers used in consumer burners to burn pits into a
>> layer of coloured dye.
>>
>> But, and this is a BIG BUT, this dye, over time, will run back
>> together and the pits you have burned in your disc will disappear. The
>> Smithsonian Institute was one of the first to get bitten by this when
>> they began archiving crumbling wax cylinder and shellac disc media
>> some years back onto regular consumer CD-R's. Now, virtually all of
>> these CD-R's are unplayable, and in some cases the media they were
>> recorded from was damaged beyond repair during the recording process.
>>
>> Some manufacturers claim to sell 100 year archival CD-R's, but I would
>> take their claims with a grain of salt. As old as the vinyl format is,
>> no one has yet to develop a longer-lasting format if the LP's are kept
>> clean, dry, and in a low-humidity environment. And commercial CD's and
>> DVD's made with an aluminum substrate layer also probably have a long
>> life-expentency.
>>
>> So were I to undertake such a project, I would not even bother with
>> the CR-R's or DVD's you can buy in any of the office stores - I would
>> look for an external big hard drive to use to archive onto, and I
>> would then back up it's information on another external HD just to be
>> safe. And I would keep my original media.
IIRC early on and simply put, I read that recording onto CD-R caused
_chemical_ changes, whereas CD-RW involved _physical_ changes and that the
life expectancy of a CD-RW recording was orders of magnitude greater than
that for a CD-R, (in case anyone's concerned that they might outlive their
CD-Rs). Additionally it is known that CD-R recordings are degraded by
exposure to sun light, however I do not know if this is true of CD-RW.
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