Coolest Scientist Ever
Wednesday, October 14th, 2009
World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale from World Science Festival on Vimeo.
This clip is from the session Notes and Neurons at the World Science Festival 2009, which asks the question whether responses to music are hard-wired into the human mind or culturally determined. I hope, for the sake of my ethnomusicologist friends, that there’s a good deal of the emotional response that’s culturally determined, but I wouldn’t be surprised if notes and intervals were hard-wired into us.
Without going too far into (or knowing too much of) the science behind it, groups of notes form harmonies because their wavelengths resonate together in a pleasing way. Other combinations don’t really work. Try walking up to a piano and hitting a C and an F# right in the middle of the piano (not near the top, where the wavelengths mesh more easily). You’ll see what I mean.
The pentatonic scale (used in the video above, although not explained to the audience until after the fact) contains only five notes (root, third, fourth, fifth, seventh, in Western terms), so those intervals are likely to fall on any scale worldwide. For example, in Western music, we (mostly) use an eight-note scale—but in traditional Asian music, for example, they use a thirteen-note scale. The pentatonic is the lowest common denominator of both.
If you’re wondering what this pentatonic scale is, you’ll here it in most funk bass lines and most rock guitar solos. It’s very popular in modern music.
Anyway, that’s your music lesson for the day. Next time: the blue note!
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