Hehe you beat me to it by 1 minute and 2 seconds. While I was fooling around with other things.

Anyone know what this effect is called?

harmonics?

http://en.wikipedia.org/wiki/Risset_tone

>Anyone know what this effect is called?

TRIPPY, dude!

Upvote for making me cry.

Amazing... ahh the brain... a weird and wonderful thing.

i am NOT ok with that.

http://upload.wikimedia.org/wikipedia/commons/6/61/DescenteInfinie.ogg
sounds cool too

It just replays the same tone over and over... I don't get it. Am I supposed to hear something?

Comment hidden because you are ignoring dag.(show it anyway)

yes, K0MMIE - it should sound like it's continuing up the scale - that's the illusion.

OH, i Just heard the same couple sounds repeating over and over... I read up on it, and I get it.. I just don't hear it. It's because I have super hero hearing and the electrons firing in my brain cause such a racket.

That's pretty wild. You see millions of optical illusions but that's the first I've heard of an audio illusion.

AHHHHHHHHHHHHH! Sweet mother-of-acid-flashbacks make it stop!

If you replay it 13 times, only dogs and bats can hear it.

People who are "tone-deaf" probably won't hear it.

Quite cool. If I don't think about it.. it seems to go up. But if I concentrate, it becomes obvious that it is the same tone. The brain sure plays tricks doesn't it?

Since we can no longer use waterboarding and other interrogation tactics deemed inhumane, perhaps this recording will suffice as a replacement.

This upsets Sam lying next to me as I play this. ---->

As cool as this is, you need to hear the descending one on wikipedia. It's more impressive and much, much creepier. Here's a direct link http://en.wikipedia.org/wiki/Image:DescenteInfinie.ogg

In 1996 an ambient compilation came out on EM:T records called EM:T Explorer that had a track that exploited this same effect. The last track on the 1st CD was called Endlessly Downward and by an artist Beatsystem, and featured a 12 second loop repeated for 3 minutes and some odd seconds. So awesome.

The effect, though, is not new. As mentioned in the wiki page, bach utilised this effect as well. Everybody whose mind has just been blown? Go and read Godel, Escher, Bach: An Eternal Golden Braid, by Douglas Hofstadter.

it stopped working after the first replay.

Neat.

brain 1, reality nil.

leading tone ftw

am i the only one who played it 5 times in a row? and was still amused?