'Open Outcry' featured 12 singers and a cellist, Joseph Spooner. The audience sat at tables among the "traders" (in the trading pit), and the conductor rang a bell to signify the market opening. As the cellist played, large screens displayed stock information and the conductor guided some aspects of the permissible actions of the singers. The performers sang one musical phrase to buy each asset and another to sell. The prices were largely driven by random market movements generated by a computer model, though the conductor did have some power to influence stock prices, as did the effect of the "trading" between the singers themselves.