I, piano? We, Drums. Freqtric drums, by Tetsuaki Baba, is a device that turns people into drums. A player hits 1-10 other people to play drums. The player and the played wear rings that are wired to Freqtric Drums’ central processing unit.

[Freqtric Drums. The player and the played wear special rings.]

Don’t miss the video.
Looks like the guy next to the player is sometimes rubbing the hands of the played with something (a kind of conductive liquid?)

[Playing something jazzy by touching “playable audience”]

Freqtric Drums were recently featured at Digital Stadium. As Kuwakubo points out, it’d be interesting to enhance the device so that different kinds of touch produce different sound volume, etc.