Preserving Access for the Future: Updates on Various Activities in Digital Preservation

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Preserving Access for the Future Updates on
Various Activities in Digital Preservation

• ALA MidWinter 2006
• San Antonio, TX

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Standards Best Practices

• Standards Out of Date
• Call for analog tape
• EBU has standard
• Best Practices Abound
• Whats best for your institution situation

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Preservation Set

• Preservation Master
• Use Access Copy
• Web-Accessible Copy

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Preservation Master

• Key Traits
• Rarely accessed
• Most important to manage
• Typically 96kHz/24bit
• .WAV or .BWF
• wave or broadcast wave
• Rarely, though sometimes still 1/4 analog

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Preservation Master

• Key Advantages
• Widely used
• Higher resolution than 99 of sources
• Better than most playback chains
• Derivatives easily created
• EBU Standard

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Preservation Master

• Key Difficulties
• No standard storage medium
• Data tapes expensive to maintain
• Too big for CD-ROM
• On-line storage requires on-going maintenance
• Internet Delivery impractical
• 5x play time for T1 .ftp

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Preservation Master

• Typical Solution
• 96/24 on hard drive to digital library
• Enterprise-level storage
• 96/24 on DVD-ROM
• Can be migrated easily to HDD when available
• Do something else
• Gold CD-R
• CD-ROM

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Use Access Copy

• Key Traits (and Advantages!)
• Readily accessible
• User-friendly format
• Good enough to substitute for Preservation Master
  is lost
• Nearly Always CD-Audio

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Use Access Copy

• Key Difficulties (CD-Audio vs. CD-ROM)
• CD-DA (digital audio)
• Pure serial-read (cant re-read to correct
  errors, even transient errors)
• CD-ROM (digital audio as data)
• Sector-based so can re-read (more reliable)
• Requires computers (software, OS, etc) to
  retrieve
• CD-DA more widely playable
• CD-ROM more reliably played

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Use Access Copy

• Typical Solutions -- Depends somewhat on
  Preservation Master
• CD-DA for near-universal playability
• Multiple copies
• CD-DA, one copy on gold, one on green
• CD-ROM (gold?) and CD-DA (green)
• Gold CD-R for Preservation Master, Green for UA

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Web-Accessible Copy

• Depends on Rights
• RA ACC more secure than mp3 or WMA
• Depends on Needs
• Too restricted to put on line
• Beyond institutional abilities or needs
• Perhaps as-needed only

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Questions?

• George Blood
• Safe Sound Archive
• georgeblood_at_safesoundarchive.com
• [phone]
• www.safesoundarchive.com