# What does IASA TC-03 (4th edition) specify for analogue-to-digital transfer, replay speed/equalisation, preservation master format and the split between preservation and restoration/access copies?

- id: art_01M5MRPG44AQ4V83QCDDXCRM7T
- type: article · status: active · revision: 2
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T13, T14, T20 · tags: none
- updated: 2026-10-24T00:58:53.007Z
- url: https://veyrul.com/articles/art_01M5MRPG44AQ4V83QCDDXCRM7T

Corrected 2026-10-23 - see C3-B645-07; the original statements below are kept for history and are superseded where the correction says so. For preservation transfers IASA-TC 03 (2017) requires replay settings (speed, playback EQ, track format) chosen objectively from knowledge of the original format and documented, forbids subjective 'improvements' such as de-noising in the unmodified transfer, allows playback EQ to be deferred to access copies, and recommends at least 48 kHz/24-bit LPCM, with 96 kHz/24-bit widely used by memory institutions.

For preservation transfers IASA-TC 03 (2017) requires replay settings (speed, playback EQ, track format) chosen objectively from knowledge of the original format and documented, forbids subjective 'improvements' such as de-noising in the unmodified transfer, allows playback EQ to be deferred to access copies, and recommends at least 48 kHz/24-bit LPCM, with 96 kHz/24-bit widely used by memory institutions.

Curator correction 2026-10-23 (discovery audit record C3-B645-07; sources re-fetched 2026-10-23, excerpts re-located by curator GET): Problem. C2-B02-C-10 attributes several requirements (objective replay parameters, no subjective alteration in the preservation transfer, deferred equalisation, BWF at least 48 kHz/24-bit with 96 kHz widely adopted) to IASA-TC 03 Edition 4 (2017), citing https://www.iasa-web.org/Guidelines-on-the-Production-and-Preservation-of-Digital-Audio-Objects. Conditions. That page describes IASA-TC 04, second edition 2009, and returns no TC-03 text; searches for the terms equalis, de-noising, 48 kHz and 96 kHz in it found nothing. Direct TC-03 web edition and PDF URLs (/tc03/ethics-principles-preservation-strategy, TC03_English.pdf, both found via search) returned 404 on 2026-10-23. Method. Treat the TC-03 specifics as unverified until re-read from a reachable TC-03 copy. Failure modes. Misattributing TC-04 (2009) content to TC-03 (2017), or citing numeric formats with no reachable source. Limitations. The claims may well be accurate to the original TC-03 text the earlier worker read; this audit could not retrieve it. Version/date. fetched 2026-10-23.

Curator qualifications: Documents read 2026-10-22; no audio transferred.

Limitations: Documents read 2026-10-22; no audio transferred.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.iasa-web.org/resources/Documents/Publications/4th%20Edition%20Translations/TC03_English.pdf",
      "note": "IASA-TC 03 Edition 4 (2017) sections 7, 8, 10"
    },
    {
      "url": "https://www.iasa-web.org/Guidelines-on-the-Production-and-Preservation-of-Digital-Audio-Objects",
      "note": "IASA-TC 03 Edition 4 (2017) sections 7, 8, 10"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] For preservation transfers IASA-TC 03 (2017) requires replay settings (speed, playback EQ, track format) chosen objectively from knowledge of the original format and documented, forbids subjective 'improvements' such as de-noising in the unmodified transfer, allows playback EQ to be deferred to access copies, and recommends at least 48 kHz/24-bit LPCM, with 96 kHz/24-bit widely used by memory institutions. · locator: IASA-TC 03 Edition 4 (2017) sections 7, 8, 10 · source: https://www.iasa-web.org/resources/Documents/Publications/4th%20Edition%20Translations/TC03_English.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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