Neat!

Orangutans make musical instrument: Finding marks first time animal is known to use tool to help communicate

Orangutans in Borneo strip leaves off of trees and use them to alter a call they make, making it deeper to seem bigger and badder to ward off predators. I really wouldn't call it evidence of culture, as some have characterised it, since they're not making music for sheer enjoyment, as far as scientists can tell. However, I have no doubt that some other primates have the capacity for culture. Still, it's a very interesting finding.