From the AP, via chicagotribune.com:
Thousands of years ago, Chinese emperors held ceremonial concerts with elaborately crafted musical instruments to equate musical harmony with good government. But some philosophers worried about too much harmony, causing lewdness and depravity, if men and women played in an orchestra together.
An exhibit that opens Saturday at the Freer Gallery of Art, part of the Smithsonian, shows the bells, drums, zithers and other instruments — but leaves open the question of whether orchestras then allowed for a musical mixing of the sexes.