Four hours of baby play that has been packed into a two minute long timelapse video. The song is “Ensemble” by the Canadian artist Coeur de Pirate. [via]
Here’s a cool auditory illusion of a tone that continually ascends or descends in pitch, yet which ultimately seems to get no higher or lower.
A Shepard tone is a sound consisting of a superposition of sine waves separated by octaves. When played with the base pitch of the tone moving upwards or downwards, it is referred to as the Shepard scale.
The way to really get the experience is to play it again, again, again, and again. And it’ll just seem like the sound keeps getting higher in pitch and tone. [via]