raisin.com wurde im letzten Monat von mehr als 10.000 Nutzern besucht
Earn more interest. CD accounts on Raisin with just $1 min to open. CDs with no fees to open. Top rates from FDIC insured banks.
- Raisin FAQ
Read through our guide:
service, taxes, safety, rates&more
- View offers
Explore savings products!
Competitive rates.
- Raisin FAQ
The Official Site. Find Out How to Get a Free Custom Quote and Free Proof Today. Visit Bison Disc For All Your High Quality, Custom Made CD Manufacturing Orders
Suchergebnisse
Suchergebnisse:
18. Aug. 2022 · Auf eine Compact Disc passten plötzlich 74 Minuten Musik (wie es der Mythos so will, ausgerichtet an einem der berühmtesten Musikstücke der Klassikgeschichte, aber dazu in den Fakten mehr), die...
- Overview
- Physical characteristics
- Recording and replication
- Playback
compact disc (CD), a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Since its commercial introduction in 1982, the audio CD has almost completely replaced the phonograph disc (or record) for high-fidelity recorded music. Coinvented by Philips Electronics NV a...
A standard CD is 120 mm (4.75 inch) in diameter and 1.2 mm (0.05 inch) thick. It is composed of a clear polycarbonate plastic substrate, a reflective metallic layer, and a clear protective coating of acrylic plastic. The reflective metallic layer is where audio data is read in the form of minuscule (as short as 0.83 micrometre) depressions (pits) a...
The production of a CD begins with a digital tape master supplied by the recording studio (see also digital sound recording). The information on this tape is used to modulate a beam of light from a blue laser as it traces a spiral path on the surface of a spinning glass disc. The glass is coated with a photosensitive material that dissolves where it is exposed to laser pulses, forming the pits. This “glass master” is coated with a thin layer of nickel to form a “metal master,” and the metal master in turn is used to produce a number of “mothers.” Each mother serves as the master for several metal “stampers,” onto which molten polycarbonate is injected for molding into clear plastic discs. Each disc is exposed to a stream of vaporized or atomized aluminum, which forms the reflective layer, and is then coated with the protective acrylic layer. The entire production process is carried out under conditions of laboratory-like cleanliness and control.
By the mid-1990s, however, developments in computer technology advanced such that CD recording and replication could avoid the need for a digital tape master. High-quality sound recordings could be sent from the microphone or other device directly to computer programs whose digital files could be stored on the computer’s hard disk (or magnetic storage media) before being transferred to a CD.
Britannica Quiz
Electronics & Gadgets Quiz
When a disc is inserted into a CD player, the disc’s track is scanned by a low-intensity infrared laser with a 1-micrometre-diameter focal point. In order for the laser to maintain a constant scanning rate, the disc’s rotation rate decreases from 500 to 200 revolutions per minute as the light beam spirals out from the disc’s centre. (Some CD player...
- The Editors of Encyclopaedia Britannica
Making a compact disc involves first preparing a glass "disc master." This master is then encoded with the desired information and put through a series of electroforming steps. In electroforming, metal layers are deposited on the glass master using electric currents.
2. März 2023 · 35 Years Ago, Dire Straits Physically Changed How We Listen to Music. The band’s 1985 smash hit “Brothers In Arms” was the flag-bearer of the compact disc era. Produced by Neil Dorfsman (Bruce Hornsby, Sting), Brothers in Arms was one of the first albums recorded digitally, via Sony’s 24-track digital tape machine.
28. Mai 2015 · The compact disc, 1985-2015. Music. This article is more than 8 years old. How the compact disc lost its shine. It’s 30 years since Dire Straits’ Brothers in Arms began the CD boom. How did...
17. Aug. 2007 · The first compact disc was produced exactly 25 years ago in a factory in Germany after years of development by Philips and Sony. We take a look at the humble disc's history and how it...
7. Feb. 2018 · Born, as Sony states, nearly 100 years after the first phonograph player, the CDP-101 made its way to the U.S. (and across the globe) around six to seven months after its initial debut in 1983, and...