Topic summary
Audio CD
Extracted from the Wikipedia article Compact Disc Digital Audio.
References
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{{}}: CS1 maint: deprecated archival service () - ^ . Riaa.com. Archived(PDF) from the original on 9 May 2023 2023.
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- ^ . Audio Engineering Society. March 1979. Archived from the original on 25 July 2009 2009.
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{{}}: CS1 maint: deprecated archival service () - ^ 2012.
The first test CD was Richard Strauss's Eine Alpensinfonie, and the first CD actually pressed at a factory was ABBA's The Visitors, but that disc wasn't released commercially until later.
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- ^ . Recording Industry Association of America. Archived from the original(PDF) on 30 September 2015.
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- ^ (Report). Recording Industry Association of America 2025.
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- ^ . Webstore.iec.ch. Archived(PDF) from the original on 16 October 2015 2015.
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The Nyquist rate is twice the bandwidth of the signal ... The Nyquist frequency or folding frequency is half the sampling rate and corresponds to the highest frequency which a sampled data system can reproduce without error.
- ^ . Radio-Electronics. Vol. 53, no. 3. New York: Gernsback Publications. pp. 39–40. ISSN 0033-7862. Archived(PDF) from the original on 9 March 2021 2025.
The frequency response of the system is absolutely flat from 20 Hz to 20,000 Hz. The digital sampling-frequency is 44.1 kHz, which would theoretically give a response up to 22.05 kHz. Some margin, though, is left for high frequency cut-off filtering.
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- ^ , archived(PDF) from the original on 16 October 2015 2015
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An international collaboration between Philips and the Sony Corporation lead to the creation of the compact disc. The author explains how it came about
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This Rykodisc release was the first compact disc to contain 80 minutes of music; 78 minutes had previously been the longest length possible to encode on a CD.
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- ^ . Hochschule Rhein-Main (in German). pp. 51–53. Archived(PDF) from the original on 9 October 2022 2020.
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An added feature of audio CD's is that in the event of damage, the missing data can be interpolated; that is to say, the information follows a predictable pattern that allows the missing value to be guessed at. So if an audio CD is damaged by dirt or a scratch, the missing data can be averaged from a pattern with no noticeable difference to the listener. This is something the next technology in optical digital memory, CD-ROM, cannot do because an executable program's data doesn't follow a natural law. An interpolation-based guess isn't just slightly different; it's completely wrong. Because of this precision, CD-ROM drives for PC's came later and much more expensive than audio.
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