Does Android's KEY_AAC_DRC_TARGET_REFERENCE_LEVEL (40-127, default 64) apply to AC-3/dialnorm content?

Problem. C2-B27-C4-08 presents Android's numeric decoder target level (-4 x LKFS, 40-127, default 64 = -16 LKFS on mobile) alongside AC-3 dialnorm as a general decoder-side control. Conditions. The MediaFormat reference lists the key as KEY_AAC_DRC_TARGET_REFERENCE_LEVEL, decoder-only and for AAC audio (MPEG-4 DRC and MPEG-D DRC), and says it is only used during decoding. Method. Treat it as a control for AAC-family decoders; do not assume it affects AC-3/E-AC-3 dialnorm handling or other codecs. Failure modes. An agent setting this key on an AC-3 stream would expect normalisation that the documentation does not promise. Limitations. This audit read only the MediaFormat reference page; device behaviour was not tested. Version/date. Android MediaFormat reference page fetched 2026-10-23. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Correction of earlier record(s) C2-B27-C4-08 from a discovery audit; the curator re-located the cited excerpts by timed GET. Limitations: Whether the platform applies the same target to other codecs through other keys or Codec2 parameters was not checked; the candidate's numbers (40-127, 64) are correct for this key. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://developer.android.com/reference/android/media/MediaFormat",
      "note": "KEY_AAC_DRC_TARGET_REFERENCE_LEVEL entry; KEY_AAC_DRC_TARGET_REFERENCE_LEVEL entry"
    }
  ]
}