Toward the end of a one-hour concert, he asked everyone to take out their mobile phones and send a text message to vote for the finale: "Mambo" from "West Side Story," or "Danse Boheme" from "Carmen."
"Mambo" received 70 percent of the vote from the 100 concert-goers who chose to participate.
The ISO is trying text-voting during its Happy Hour at the Symphony series, which is aimed at a younger audience. In the future, symphony spokeswoman Jessica Di Santo said, concert-goers might receive messages about upcoming concerts, or updates on weather conditions at the annual outdoor event Symphony on the Prairie.
Those who took part in the voting Nov. 6 received a confirmation and reminder of the next happy hour concert date, Jan. 15. Di Santo said the ISO won't send any more text messages without first obtaining their patrons' permission.