name: Dolby Digital
pattern: (?i)(?<!E[-_. ]?)\bAC-?3(?:[\s._-]?\d+\.\d+)?\b
description: ''
tags:
- Audio
tests:
- expected: false
  id: 1
  input: Parks.and.Recreation.S03E16.Lil.Sebastian.1080p.AMZN.WEBRip.DD5.1.x264-NTb
  lastRun: '2025-07-07T13:43:45.813684'
  matchSpan: null
  matchedContent: null
  matchedGroups: []
  passes: true
- expected: false
  id: 2
  input: WALL-E.2008.2160p.UHD.BluRay.x265.HDR.DV.DD.7.1-Pahe.in
  lastRun: '2025-07-07T13:43:45.813684'
  matchSpan: null
  matchedContent: null
  matchedGroups: []
  passes: true
- expected: true
  id: 3
  input: Waynes.World.1992.720p.BluRay.x264.AC3.5.1-TBB
  lastRun: '2025-07-07T13:43:45.813684'
  matchSpan:
    end: 42
    start: 35
  matchedContent: AC3.5.1
  matchedGroups: []
  passes: true