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Two different ways of marking cut-out records on LP jackets. When LPs were the primary medium for the commercial distribution of sound recordings, manufacturers would cut the corner, punch a hole, or add a notch to the spine of the jacket of unsold records returned from retailers; these "cut-outs" might then be re-sold to record retailers or other sales outlets for sale at a discounted price.
A CD can be used to store audio, video, and data in various standardized formats defined in the Rainbow Books. CDs are usually manufactured in a class 100 (ISO 5) or better clean room, to avoid contamination which would result in data corruption. They can be manufactured to strict manufacturing tolerances for only a few US cents per disk.
A gold CD in a lift-lock case. A gold compact disc is one in which gold is utilized in place of the high-purity aluminium or silver commonly used as the reflective coating on ordinary CDs and CD-Rs respectively. Gold disks are available as both CDs and CD-Rs as well, and are compatible with standard players and recorders.
Several other formats were further derived, both pre-pressed and blank user writable, including write-once audio and data storage , rewritable media , Video CD (VCD), Super Video CD (SVCD), Photo CD, Picture CD, Compact Disc-Interactive , Enhanced Music CD, and Super Audio CD (SACD) which may have a CD-DA layer.
Flimsier cases may cause the CD to become loose, or even fall out. Also, since the jewel case is made of plastic, it is sturdier compared to cardboard, paper, or foams. When pressure is applied to the CD jewel case, the case will break first before the CD. If the case is made of thin cardboard, there is a greater chance that the CD would break ...
The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data. While optical discs are generally more reliable and durable than older media types, (magnetic tape, LPs and other records) environmental conditions and/or poor handling can result in lost information.
But in the past year, the S&P 500 has gained 33.69%. $10,000 invested in the S&P 500 index one year ago would be worth about $13,369 today, while a 4.70% APY CD would only be worth $10,470. That's ...
Acetates are usually made by dubbing from a master recording in another medium, such as magnetic tape.In the vinyl record manufacturing process, a lacquer master disc is cut and electroforming is used to make negative metal molds from it; certain molds are converted into stampers, can be used to press thousands of vinyl copies of the master.
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