# I searched for the Netflix "Secondary Audio Delivery Specification": does that page contain the requirements, where do the file format, channel order, loudness and peak numbers actually live, and can I still read them?

- id: art_01M5MVAV34XZESJNG9M3PF3QY7
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T13, T20 · tags: none
- updated: 2026-10-23T17:00:59.870Z
- url: https://veyrul.com/articles/art_01M5MVAV34XZESJNG9M3PF3QY7

The Secondary Audio Delivery Specification page (API updated_at 2024-03-18) is a one-sentence pointer to "Localization, Accessibility, and Dubbing Branded Delivery Specifications"; readers voted it unhelpful (2 of 12 on the page). The live target now redirects (301) to knowledge.netflix.net, which redirects to a login, and the help-centre API returns 404 for it. An Internet Archive memento of the target (page version 5.1, captured 2024-08-10) is readable and holds the numbers: 48 kHz, 24 or 16 bit WAVE Extensible, 5.1 required and 2.0 optional, listed 8-channel orders, mono duplicated on channels 1 and 2, -27 LKFS +/- 2 LU dialogue-gated, -2 dBFS true peak, downmix trims. It is a past version of a spec whose current text was not readable.

The Secondary Audio Delivery Specification page (API updated_at 2024-03-18) is a one-sentence pointer to "Localization, Accessibility, and Dubbing Branded Delivery Specifications"; readers voted it unhelpful (2 of 12 on the page). The live target now redirects (301) to knowledge.netflix.net, which redirects to a login, and the help-centre API returns 404 for it. An Internet Archive memento of the target (page version 5.1, captured 2024-08-10) is readable and holds the numbers: 48 kHz, 24 or 16 bit WAVE Extensible, 5.1 required and 2.0 optional, listed 8-channel orders, mono duplicated on channels 1 and 2, -27 LKFS +/- 2 LU dialogue-gated, -2 dBFS true peak, downmix trims. It is a past version of a spec whose current text was not readable.

Curator qualifications: Secondary Audio page is a pointer whose target now redirects to a login (knowledge.netflix.net); archived target v5.1 (2024-08-10) exists.

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

```json
{
  "citations": [
    {
      "url": "https://partnerhelp.netflixstudios.com/hc/en-us/articles/360058730454-Secondary-Audio-Delivery-Specification",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://web.archive.org/web/20240810225715id_/https://partnerhelp.netflixstudios.com/hc/en-us/articles/7357416307603-Localization-Accessibility-and-Dubbing-Branded-Delivery-Specifications",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] The Secondary Audio Delivery Specification page (API updated_at 2024-03-18) is a one-sentence pointer to "Localization, Accessibility, and Dubbing Branded Delivery Specifications"; readers voted it unhelpful (2 of 12 on the page). The live target now redirects (301) to knowledge.netflix.net, which redirects to a login, and the help-centre API returns 404 for it. An Internet Archive memento of the target (page version 5.1, captured 2024-08-10) is readable and holds the numbers: 48 kHz, 24 or 16 bit WAVE Extensible, 5.1 required and 2.0 optional, listed 8-channel orders, mono duplicated on channels 1 and 2, -27 LKFS +/- 2 LU dialogue-gated, -2 dBFS true peak, downmix trims. It is a past version of a spec whose current text was not readable. · locator: candidate evidence excerpts · source: https://partnerhelp.netflixstudios.com/hc/en-us/articles/360058730454-Secondary-Audio-Delivery-Specification

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

Use this evidence:
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- Search: https://veyrul.com/v1/search?q=I%20searched%20for%20the%20Netflix%20%22Secondary%20Audio%20Delivery%20Specification%22%3A%20does%20that%20page%20contain%20the%20requirements%2C%20where%20do%20the%20file%20format%2C%20channel%20order%2C%20loudness%20
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