Recordings used on diffio.ai/remove-echo-from-audio/ (excerpts restored with Diffio 4.5 Flash and Diffio 4.5 Pro on October 19, 2026)

None of the speakers, authors or organizations below is a Diffio customer or endorses Diffio. Each file in this folder is an excerpt of the original work; the -flash and -pro files are Diffio restorations of that excerpt (changes made). Details and hashes: manifest.json.

stone-chapel-*.mp3, and the audio in echo-removal-walkthrough.mp4/.webm
  "Sermon at Calvary, Church of the Holy Sepulchre" (homily by Fr. John Faris, July 25, 2015)
  Author: Fabricio E. Lomanto
  Source: https://commons.wikimedia.org/wiki/File:Sermon_at_Calvary,_Church_of_the_Holy_Sepulchre.webm
  License: CC BY 3.0, https://creativecommons.org/licenses/by/3.0/
  Excerpt: 0:12.7 to 0:50.6

museum-gallery-*.mp3
  "Old Courthouse Tour Part 1" (Ranger Carl, Gateway Arch National Park, St. Louis; created May 22, 2020)
  Author: National Park Service (credit: NPS/Sue Ford)
  Source: https://www.nps.gov/media/video/view.htm?id=1883EC21-5EC7-4575-8D4F-A7FECDC0EA91
  License: Public domain (work of the National Park Service, credited to NPS with no copyright symbol; https://www.nps.gov/aboutus/disclaimer.htm); no endorsement implied
  Excerpt: 0:23.1 to 0:54.2

library-lecture-*.mp3
  "Lecture by Dovid Katz „Cultures of the Litvaks“" (November 4, 2024)
  Author: Vilniaus žydų viešoji biblioteka (Vilnius Jewish Public Library)
  Source: https://commons.wikimedia.org/wiki/File:Lecture_by_Dovid_Katz_%E2%80%9ECultures_of_the_Litvaks%E2%80%9C.webm
  License: CC BY 3.0, https://creativecommons.org/licenses/by/3.0/
  Excerpt: 29:53.6 to 30:22.1

school-cafeteria-*.mp3
  "Red Cross Shelter Serves Florence Evacuees" (a Red Cross volunteer at the Smith Middle School shelter, Chapel Hill, North Carolina; September 2018)
  Author: VOA News (Voice of America)
  Source: https://commons.wikimedia.org/wiki/File:Red_Cross_Shelter_Serves_Florence_Evacuees.webm
  License: Public domain (work of Voice of America, a U.S. government agency); no endorsement implied
  Excerpt: 0:40.8 to 1:18.9

conference-hall-*.mp3
  "Margrit Hugentobler's speech, Lidköping, Sweden" (Ekta Europe meeting, April 2017)
  Author: Yann Forget
  Source: https://commons.wikimedia.org/wiki/File:Margrit_Hugentobler%27s_speech,_Lidk%C3%B6ping,_Sweden.webm
  License: CC BY 3.0, https://creativecommons.org/licenses/by/3.0/
  Excerpt: 0:54.4 to 1:27.4

direct-sound-and-reflections.webp
  Illustration generated with OpenAI GPT Image (gpt-image-2.5-flare) for Diffio, October 19, 2026. Diffio's own.

echo-removal-walkthrough.mp4 / .webm / -poster.webp / .vtt
  Diffio app screenshots (Diffio's own) composed with HyperFrames; audio as credited for stone-chapel above.