Alright, the flute shown on your link is listed as older than the one on this thread, so these people are lying when they say it is the oldest flute artifact found! Wow, imagine, an Archeologist lying about their find!
The do-re-mi flute (shown in the graphic posted above, thanks Fred Nerks) isn’t accepted as a flute by all, or most, and I’m not too sure it’s even accepted as an artifact by some. :’)