CDs have a Power Calibration Area, used to calibrate the writing laser before and during recording. CDs contain two such areas: one close to the inner edge of the disc, for low speed calibration, and another on the outer edge on the disc, for high speed calibration. Real-life not accelerated aging tests have revealed that some CD-Rs degrade quickly even if stored normally.
According to research conducted by J. Perdereau, CD-Rs are expected to have an average life expectancy of 10 years. Instead they are sourced from different manufacturers of varying quality. For best results, the actual manufacturer and material components of each batch of discs should be verified. Burned CD-Rs suffer from material degradation, just like most writable media.
CD-R media have an internal layer of dye used to store data. In a CD-RW disc, the recording layer is made of an alloy of silver and other metals—indium, antimony, and tellurium. As well as degradation of the dye , failure of a CD-R can be due to the reflective surface. While silver is less expensive and more widely used, it is more prone to oxidation resulting in a non-reflecting surface. Gold on the other hand, although more expensive and no longer widely used, is an inert material, so gold-based CD-Rs do not suffer from this problem.
Manufacturers have estimated the longevity of gold-based CD-Rs to be as high as years. It is recommended if using adhesive-backed paper labels that the labels be specially made for CD-Rs.
A balanced CD vibrates only slightly when rotated at high speed. Bad or improperly made labels, or labels applied off-center, unbalance the CD and can cause it to vibrate when it spins, which causes read errors and even risks damaging the drive. A professional alternative to CD labels is pre-printed CDs using a 5-color silkscreen or offset press. Using a permanent marker pen is also a common practice. However, solvents from such pens can affect the dye layer.
Destroying the data requires physically destroying the disc or data layer. Heating the disc in a microwave oven for 10—15 seconds effectively destroys the data layer by causing arcing in the metal reflective layer, but this same arcing may cause damage or excessive wear to the microwave oven.
Many office paper shredders are also designed to shred CDs. Some recent burners Plextor, LiteOn support erase operations on -R media, by "overwriting" the stored data with strong laser power, although the erased area cannot be overwritten with new data. The polycarbonate material and possible gold or silver in the reflective layer would make CD-Rs highly recyclable. However, the polycarbonate is of very little value and the quantity of precious metals is so small that it is not profitable to recover them.
From Wikipedia, the free encyclopedia. Redirected from Music cd-r. From United Kingdom. Verified Purchase. I didn't knew Vektor so well before this album came out, i am more of an old school metal fan, but it got too many positive reviews on many metal forums and sites so i had to check it out. I was surprisingly enjoyed it much, the music is amazing all the way, the album is too long in my opinion but still not boring for one second.
Vocals are interesting, it's like listening to Chuck Schuldiner RIP, which was one my favorite extreme vocals. And with the music itself, thrash, black, prog metal like listening to a blend of Death, Coroner, Voivod, Kreator, Bathory and such. The one thing was complex for me was the lyrics, too much lyrics and it's hard to understand the meaning of them, i have no idea about fiction and such subjects, but the music really compensate and there is no boring moment in here. Artwork is interesting also and it's part of the music.
Clearly Vektor has many influences in here, but still they sound unique and not a copycat. I can't decide which songs are highlights because they are hard to digest, need to listen to this album a lot, but i think the whole album is a big highlight, no need to skip, enjoyable from the first second to the last second, a bit long but totally worth it, just push play and go into a journey, and watch your head.
In a meanwhile, i am going to fix my mistake and buy the previous albums of Vektor. There was a problem loading the comments at the moment. Showing 0 comments. Sort by: Newest Oldest. I got this album only a couple of weeks before seeing them live at which they were so confident of their new material that they played it from start to finish and even omitted songs from their set that could be considered some of their best.
The sound has changed slightly from their previous outing on Outer Isolation with a more epic storytelling feel and the consistency from the start is relentless all the way through. The sheer volume of material in each song is astonishing and provides a few accessible hooks to engage you while also providing various layers that extend the longevity of future listens. Nvidia has acquired Arm. What does this mean for the future of AI, edge….
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Säbeltanz - Khatchaturian* / Rimsky-Korssakoff* - Leningrader Philharmonie* / Orchestre Des Concerts, Winter Pageant - Various - Cafe Del Mar Volumen Siete (CD), Snaggletooth - Motörhead - No Remorse (CD), Carlos Francisco - Searching For Jack E.P (File, MP3)