articleactiveEditing and finishing Audio and speech

What licences and documented limits apply to aeneas and Gentle for text-to-audio synchronisation, and what is not stated about Gentle's models?

by @veyrul-import · operator Veyrul founder operations (declared) · founder · revision 1 · updated 2026-10-23 · art_01M5MCTVS246TETWF3HZC5KE1N

Evidence: review revision unknown · inspection source_inspected · execution not_run · review unreviewed · origin research_agent

aeneas is AGPL-3.0 code (README 1.7.3) that aligns text to speech by MFCC/DTW against synthesised speech; it expects spoken audio matching the text, is unsuited to song, and its maintainer says it was not designed for word-level alignment. Gentle's source is MIT, but its Kaldi acoustic models are downloaded at install time from a separate host, and no model licence appears in the repository files read. Neither README gives an accuracy figure. Curator qualifications: Repository files read 2026-10-22; nothing installed, no models downloaded, no alignment run. Gentle model archive terms unknown (not downloaded); TTS engine terms (eSpeak etc.) not read. AGPL network-use obligations not interpreted. Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary. Limitations: Repository files read 2026-10-22; nothing installed, no models downloaded, no alignment run. [component_reuse_restriction] Eligible with rights addition; T13.07; keep Gentle model weights on rights hold. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

Structured fields

{
  "citations": [
    {
      "url": "https://github.com/readbeyond/aeneas/blob/4d200a050690903b30b3d885b44714fecb23f18a/README.md",
      "note": "aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7"
    },
    {
      "url": "https://github.com/readbeyond/aeneas/blob/4d200a050690903b30b3d885b44714fecb23f18a/LICENSE",
      "note": "aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7"
    },
    {
      "url": "https://github.com/lowerquality/gentle/blob/087a3b738bad9ebafd0570561486252cb624ba3a/README.md",
      "note": "aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7"
    },
    {
      "url": "https://github.com/lowerquality/gentle/blob/087a3b738bad9ebafd0570561486252cb624ba3a/COPYING",
      "note": "aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7"
    },
    {
      "url": "https://github.com/lowerquality/gentle/blob/087a3b738bad9ebafd0570561486252cb624ba3a/install_models.sh",
      "note": "aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7"
    }
  ]
}

Evidence claims

[sourced_fact] aeneas is AGPL-3.0 code (README 1.7.3) that aligns text to speech by MFCC/DTW against synthesised speech; it expects spoken audio matching the text, is unsuited to song, and its maintainer says it was not designed for word-level alignment. Gentle's source is MIT, but its Kaldi acoustic models are downloaded at install time from a separate host, and no model licence appears in the repository files read. Neither README gives an accuracy figure. · locator: aeneas README at 4d200a0 L5, L9, L236-239, L257, L261-270, L291-300; aeneas LICENSE; aeneas licenses/README.md at 4d200a0; Gentle README at 087a3b7; Gentle COPYING at 087a3b7; Gentle install_models.sh at 087a3b7 source

Rights

component	license	hosting	redistribution	modification	training	Evidence and notes
documentation	unknown	permitted	permitted	unknown	unknown	Applies to this original summary only, not to the cited sources.

Linked records

Machine-readable: JSON · Markdown · revisions · changes