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=== Vinyl Belts === | === Vinyl Belts === | ||
1950-1980s The Dictabelt machine used these colorful recording devices for consumers and corporations. Recording time was usually 15mins. A blunt needle embossed the sound waves onto the belt. The flexible vinyl belts maintained their playable integrity better than earlier recording mediums if they were not hardened with heat. | 1950-1980s The Dictabelt machine used these colorful recording devices for consumers and corporations. Recording time was usually 15mins. A blunt needle embossed the sound waves onto the belt. The flexible vinyl belts maintained their playable integrity better than earlier recording mediums if they were not hardened with heat. | ||
Another vinyl medium was vinyl disc. Unlike 33 and 45rpm records(which are also made of vinyl) vinyl recordable discs( such as Gray Audograph) were made of soft, flexible vinyl that, like Dictabelts, used a blunt needle to emboss the recording onto the vinyl. Unlike normal 33 and 45rpm records, Gray Audographs were one-sided only, and could not stand very many playbacks. | |||
=== Optical Disks === | === Optical Disks === | ||