Sound synchronized with "Pendulum Waves"

I love this video Pendulum Waves" from Harvard so I add sound synchronized with this movie.
I made the Pure Data patch that simulates pendulum motion using formula of it.
This is my first responsing movie.

Please check out the original video.
http://www.youtube.com/watch?v=yVkdfJ9PkRQ

Harvard Natural Sciences Lecture Demonstrations
http://tinyurl.com/3ee2eya

Pendulum Wavesに感動したのでPureDataでパッチを作って合わせてみました。
比較的きちんとシンクロしています。

Видео Sound synchronized with "Pendulum Waves" канала lowtechism