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2. Record restoration - Wikipedia

   en.wikipedia.org/wiki/Record_restoration

   Record restoration, a particular kind of audio restoration, is the process of converting the analog signal stored on gramophone records (either 78 rpm shellac, or 45 and 33⅓ rpm vinyl) into digital audio files that can then be edited with computer software and eventually stored on a hard-drive, recorded to digital tape, or burned to a CD or DVD.

3. LP record - Wikipedia

   en.wikipedia.org/wiki/LP_record

   The LP (from long playing [2] or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33 + 1 ⁄ 3 rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk.

4. Comparison of analog and digital recording - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_analog_and...

   CDs became available in the early 1980s. At this time analog sound reproduction was a mature technology. There was a mixed critical response to early digital recordings released on CD. Compared to vinyl record, it was noticed that CD was far more revealing of the acoustics and ambient background noise of the recording environment. [37]

5. Timeline of audio formats - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_audio_formats

   Quadraphonic Vinyl Record (CD-4) (SQ Matrix) An SQ quadraphonic record Analog, introduced by CBS Records for matrix and RCA / JVC for CD-4 Recorded two tracks on both stereo channels, requiring a decoder to hear all four tracks. Despite this, the format is playable on any LP turntable. 1971 HiPac

6. Direct-to-disc recording - Wikipedia

   en.wikipedia.org/wiki/Direct-to-disc_recording

   Most sound recordings for records before the 1950s were made by cutting directly to a master disc. Recording via magnetic tape became the industry standard around the time of the creation of the LP format in 1948, and these two technological advances are often seen as being joined, although 78 rpm records cut from tape masters continued to be manufactured for another decade.

7. Liner notes - Wikipedia

   en.wikipedia.org/wiki/Liner_notes

   Liner notes are descended from the program notes for musical concerts, and developed into notes that were printed on the outer album jacket or the inner sleeve used to protect a traditional 12-inch vinyl record, i.e., long playing or gramophone record album. The term descends from the name "record liner" or "album liner".