The Mellotron Group

I wonder where Daft Punk got their stage pyramid idea from?

Michael Iceberg:
http://www.youtube.com/watch?v=_RpP7dheLaM

http://www.youtube.com/watch?v=EC0lZPVvlWY&feature=related

Daft Punk:
http://www.youtube.com/watch?v=c14T6Af8zJg