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A comment on TikTok reveals details of how its algorithm works. Parent comment

Re:TikTok reveals details of how its algorithm works by btilly on Thursday September 10, 2020 @11:33AM (#24433271)
They claim to be looking at the music in the video and avoiding sending you to another video with the same music.
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Re:TikTok reveals details of how its algorithm works by Drew_ on Thursday September 10, 2020 @12:35PM (#24433899)
That would be the "sound used". The music in the video is specified/labeled before upload so there's no need to actually process the sound of the video.
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