How do DCMP, Netflix English (USA) and BBC guides handle music descriptions and song lyrics in captions?

Lyrics marking differs: Netflix ♪ at start and end of each subtitle plus italics; BBC # at the start of lyric subtitles (centred), mood music labelled only when required; DCMP marks nonessential background music with a ♪ icon top right and never at the expense of dialogue. Only Netflix requires italic lyrics. Curator qualifications: Guides read 2026-10-22 (live pages); no caption files authored or validated. DCMP's exact per-caption lyric note convention not re-located by phrase search. Limitations: Guides read 2026-10-22 (live pages); no caption files authored or validated. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://dcmp.org/learn/602-captioning-key---sound-effects-and-music",
      "note": "Netflix guide, Songs; BBC Subtitle Guidelines s16 headings; DCMP Sound Effects and Music, Background Music"
    },
    {
      "url": "https://partnerhelp.netflixstudios.com/hc/en-us/articles/217350977-English-USA-Timed-Text-Style-Guide",
      "note": "Netflix guide, Songs; BBC Subtitle Guidelines s16 headings; DCMP Sound Effects and Music, Background Music"
    },
    {
      "url": "https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles",
      "note": "Netflix guide, Songs; BBC Subtitle Guidelines s16 headings; DCMP Sound Effects and Music, Background Music"
    }
  ]
}