# What loudness (LKFS) and true-peak limits do the ABC Australia, Free TV Australia and CBC/Radio-Canada documents state, and which BS.1770 revision do they cite?

- id: art_01M5MSDQX277EYF49XRDVM9KY2
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T13 · tags: none
- updated: 2026-10-23T16:27:37.750Z
- url: https://veyrul.com/articles/art_01M5MSDQX277EYF49XRDVM9KY2

Australian and Canadian broadcasters use -24 LKFS and -2 dBTP, not the UK's -23 LUFS and -1 dBTP fail line. ABC (V4.7, 2015) sets -24 LKFS average dialogue level (per Free TV OP48) and -2 dBTP maximum. Free TV OP-59 Issue 4 (2018) allows +/-1 LU and cites BS.1770-3. CBC/Radio-Canada v8.0 (January 2026) requires -24 LKFS +/-2 LU for both programme and dialogue loudness, -2 dBTP, measured with a BS.1770-5 algorithm. CBC v7.0 (2022) also sets -10 dBTP for audio-only content such as podcasts.

Australian and Canadian broadcasters use -24 LKFS and -2 dBTP, not the UK's -23 LUFS and -1 dBTP fail line. ABC (V4.7, 2015) sets -24 LKFS average dialogue level (per Free TV OP48) and -2 dBTP maximum. Free TV OP-59 Issue 4 (2018) allows +/-1 LU and cites BS.1770-3. CBC/Radio-Canada v8.0 (January 2026) requires -24 LKFS +/-2 LU for both programme and dialogue loudness, -2 dBTP, measured with a BS.1770-5 algorithm. CBC v7.0 (2022) also sets -10 dBTP for audio-only content such as podcasts.

Curator qualifications: Specs read 2026-10-22; nothing measured or delivered. CBC v8.0 verified on producer copy cbc8.pdf (sha256 fb215d383d4f1a84, equal to pin): 'Peak values -2dBTP Max.', 'Integrated program loudness: -24LKFS +/-2LU', 'ITU-R BS.1770-5 compliant algorithm', Dialnorm = integrated loudness.

Limitations: Specs read 2026-10-22; nothing measured or delivered. ABC V4.7 cites OP48; whether ABC now follows OP-59 was not checked.

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

```json
{
  "citations": [
    {
      "url": "https://site-cbc.radio-canada.ca/documents/working-travail/suppliers-fournisseurs/technical-specifications-for-program-delivery-version-8_january_23rd_2026_b.pdf",
      "note": "ABC delivery specification V4.7 May 2015, audio table and 3.9 (text layer renders minus as A); Free TV OP-59 Issue 4 (October 2018); CBC/Radio-Canada technical specifications v7.0 (March 2022)"
    },
    {
      "url": "https://site-cbc.radio-canada.ca/documents/impact-and-accountability/technology-norms/technical-specifications-for-program-delivery-version-7_0-march_8th_2022.pdf",
      "note": "ABC delivery specification V4.7 May 2015, audio table and 3.9 (text layer renders minus as A); Free TV OP-59 Issue 4 (October 2018); CBC/Radio-Canada technical specifications v7.0 (March 2022)"
    },
    {
      "url": "https://www.abc.net.au/tv/independent/doc/delivery_specification_for_standard_definition_and_high_definition_programs_as_files.pdf",
      "note": "ABC delivery specification V4.7 May 2015, audio table and 3.9 (text layer renders minus as A); Free TV OP-59 Issue 4 (October 2018); CBC/Radio-Canada technical specifications v7.0 (March 2022)"
    },
    {
      "url": "https://www.freetv.com.au/wp-content/uploads/2019/08/OP-59-Measurement-and-Managemnt-of-Loudness-for-TV-Broadcasting-Issue-4-October-2018.pdf",
      "note": "ABC delivery specification V4.7 May 2015, audio table and 3.9 (text layer renders minus as A); Free TV OP-59 Issue 4 (October 2018); CBC/Radio-Canada technical specifications v7.0 (March 2022)"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Australian and Canadian broadcasters use -24 LKFS and -2 dBTP, not the UK's -23 LUFS and -1 dBTP fail line. ABC (V4.7, 2015) sets -24 LKFS average dialogue level (per Free TV OP48) and -2 dBTP maximum. Free TV OP-59 Issue 4 (2018) allows +/-1 LU and cites BS.1770-3. CBC/Radio-Canada v8.0 (January 2026) requires -24 LKFS +/-2 LU for both programme and dialogue loudness, -2 dBTP, measured with a BS.1770-5 algorithm. CBC v7.0 (2022) also sets -10 dBTP for audio-only content such as podcasts. · locator: ABC delivery specification V4.7 May 2015, audio table and 3.9 (text layer renders minus as A); Free TV OP-59 Issue 4 (October 2018); CBC/Radio-Canada technical specifications v7.0 (March 2022) · source: https://site-cbc.radio-canada.ca/documents/working-travail/suppliers-fournisseurs/technical-specifications-for-program-delivery-version-8_january_23rd_2026_b.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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