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With the recent cost decreases in hard disk drives, oral archivists are considering moving many of their popular holdings to permanent storage in a server farm. For example, a single terabyte disk drive costing under $100 USD can hold 1,900 hours of uncompressed audio. A CD-R by contrast can only hold 76 minutes of uncompressed audio.
When practicing preservation, one has several factors to consider in order to properly preserve a record: 1) the storage environment of the record, 2) the criteria to determine when preservation is necessary, 3) what the standard preservation practices are for that particular institution, 4) research and testing, and 5) if any vendor services ...
Media at risk include recorded media such as master audio recordings of symphonies and videotape recordings of the news gathered over the last 40 years. Threats to media that must be considered when archiving important record media include accidental erasure, physical loss due to disasters such as fires and floods, and media degradation.
Audiovisual archiving—the collecting, preserving, management, and use of audiovisual heritage—has established its credentials as a distinct profession. The first audiovisual archives came into existence about a century ago, but sustained growth is basically a phenomenon of the second half of the 20th century.
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The cornerstone of digital preservation, "data integrity" refers to the assurance that the data is "complete and unaltered in all essential respects"; a program designed to maintain integrity aims to "ensure data is recorded exactly as intended, and upon later retrieval, ensure the data is the same as it was when it was originally recorded".
When resampling audio to a notably lower pitch, it may be preferred that the source audio is of a higher sample rate, as slowing down the playback rate will reproduce an audio signal of a lower resolution, and therefore reduce the perceived clarity of the sound. On the contrary, when resampling audio to a notably higher pitch, it may be ...
Delay is an audio signal processing technique that records an input signal to a storage medium and then plays it back after a period of time. When the delayed playback is mixed with the live audio, it creates an echo-like effect, whereby the original audio is heard followed by the delayed audio.