Monkey Music

A few years ago, perceptual scientist Josh McDermott of MIT and Harvard evolutionary psychologist Marc D. Hauser published a study (and here’s a laymen’s report on the report – YO DAWG I HERD U LIKE REPORTS) which dealt with the origins of music. From the abstract:

We claim that theories of the origins of music will be usefully constrained if we can determine which aspects of music perception are innate, and, of those, which are uniquely human and specific to music… Our research suggests that many rudimentary acoustic preferences, such as those for consonant over dissonant intervals, may be unique to humans.

And, of course, being scientists, they tested this hypothesis by trapping marmoset monkeys in a maze and blaring music at them. First the two ends of the maze were set up so that speakers were playing a Russian lullaby at one end and “German techno” (I heard it, it was actually jungle/drum n’ bass) at the other. And this time, the monkeys congregated near the Russian lullaby.

The next time, a control group of sorts was set up so that the German techno was replaced with no music at all. And given that choice between the Russian lullaby and nothing, the monkeys gathered near the silent speaker. So the tenative conclusion was that music is more innately a human phenomenon and that we could be uniquely hard-wired towards liking music in a way that other primates are not. This made me sad for some irrational reason. It would be cool if monkeys liked music.

But this study, like most good ones, really raised more new questions than it did answer old ones. So, for example, the monkeys used in the experiment were marmosets, or “New World monkeys,” which are more distantly related to us than, say, chimpanzees, bonobos, and gorillas. The common ancestor we share with marmosets lived around 44 million years ago, and the common ancestor we share with both chimpanzees and bonobos lived only around 5-7 million years ago. So it could be that a predisposition to music is something which arose after our branch of the evolutionary tree forked away from the marmosets- somewhere between 44 and 5 million years ago. Or, it could be that (and this is where we finally get to something new) McDermott and Hauser just weren’t using the right kind of music in their studies.

In a study in the new issue of Biology Letters, which just came out yesterday and is not yet online (although you can read reports on the study from Science News, Science Daily, and Scientific American), University of Wisconsin-Madison psychology professor Charles Snowdon teamed up with composer/cellist David Teie of the University of Maryland to run an experiment similar to the 2006 McDermott/Hauser study with an important twist. Instead of playing ordinary music, Teie created a musical composition for cello and vocals based on the tamarin calls, which is the animal on which they were experimenting. For the sake of being pedantic, the common ancestor we share with tamarins lived around the same time as the one we share with marmoset monkeys (38-49 million years ago), so this is pretty close to being a standardized test relative to the earlier one.

And the tamarins liked their custom-made music. They apparently were much calmer and groomed each other more. Snowdon says this kind of music should be used in zoos to give the monkeys a better quality of life in captivity. But that could be bad for business for the zoos, since said music is incredibly annoying to us. Don’t take my word for it though, you can listen to it at the Science News link in the above paragraph.

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2 Responses to “Monkey Music”

  1. knicvk Says:

    it’s kind of crazy how the biology of our ears influences the pitches we like to hear. the way the cochlea is coiled, there are clusters of hairs that respond to the exact frequencies of thepitches of the notes in our chromatic scale (ie C is 440hz).
    since other mammals have different ear configurations, i bet the scales they would come up with would sound totally different. i wish i could find the awesome diagram that i was shown in a class, but this weak one is the only one i could find, and really isn’t what i was looking for.

  2. ‘Uncanny Valley’ for monkeys « Atheist Hobos Says:

    […] to pretend to coddle these monkeys. They can take it. After all, they can apparently listen to extremely bad music, so I think they can handle a few […]

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