Fans record concerts. How to make them quit? Offer better instant recodings and sell them. “Those enthralled by a performance will seek mementos and there are few more appealing than a recording of the event, an audible aide de memoire. The way to persuade them to leave their Minidiscs at home and to shun those who peddle noisy, distorted, unbalanced piracies is to offer them that memento as they leave — under terms which reward not only the audience but the artists and the company.”