Andy BaioLouie Zong asked people to send him clips of themselves singing a note. He got over 200 of them, freaked out, and eventually turned them into a musical keyboard to make songs with. Here's the first one. https://www.youtube.com/watch?v=SpmYHPQdIs0
YouTube
Reminds me of Ze Frank's "Chillout" from 2010, made from audio recordings over 30 people sent him, all singing the same chorus independently. The Flash page he made for it is long-dead, but he tells the story in this TED talk here. https://www.youtube.com/watch?v=3gSSNHO1dDs#t=14m21s
Ze Frank's web playroom
Also shades of Kutiman's brilliant Thru You album, mashed up entirely from found YouTube clips, and its sequel, Thru You Too. https://thru-you.com/
https://thru-you-too.com/
https://thru-you-too.com/
ApocraphiliaCan't believe I'd forgotten this - it was absolutely formative for me back in the day.