This is similar to the production process used for CED's, wherein positive mothers were used to make negative stampers, which were then used to press the consumer discs. The Voyager records are actually gold-plated copper mothers of regular 33 RPM audio LP's, designed to spin at half speed to double the play back time with a slight loss in fidelity. This might superficially sound like the metal-plated CED's RCA was still experimenting with when the Voyager 1 and 2 spacecraft were launched in 1977, but those early CED's only played 1 hour per disc, and the metal coating was aluminum, with the CED base material still being plastic.
#VOYAGER DISK MAP HOW TO#
Each record was accompanied by a stylus and a cartridge, and most importantly, a set of instructions on how to play it."
"All the information was encoded onto discs which were coated in copper and gold to protect them through the ages. A multimedia presentation for the ages.". a two hour metal record containing images, music, and other sounds and greetings. I've gotten several inquiries lately asking if this disc is an early form of the CED, possibly because the History Channel has recently started broadcasting a segment about it on their History's Lost & Found series where it is described as: ". By comparison, a CED has a frequency range of 3 MHz, spins at 450 RPM, and will play back 360 video frames in the span of 12 seconds. But the Voyager record is not a CED, as all the information on the disc is recorded in the audio frequency range, and the disc is designed to spin at only 16 2/3 RPM requiring 12 seconds to play back a color image. I've always been fascinated with the Voyager Interstellar Record, perhaps because it's somewhat similar to a CED in being a grooved record containing nearly two hours of analog recordings of images and sounds of Earth. The Voyager Spacecraft Interstellar Record
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