But musical fashions changed. Music was moving out of the relatively small aristocratic halls of Mozart's day into the large public concert halls of the 19th century, and without amplification it simply couldn't be heard. During this period, musical instruments in general were significantly redesigned to make them louder to be heard in the larger public concert halls—the piano went through a major transformation from a "quiet little harpsichord with hammers" of Mozart's day to the massive instrument we know today, and instruments of the orchestra—strings, winds, brass—were all modified to increase their volume. But there really wasn't any way to make the armonica louder. Concert reviews from the period bemoan the fact that the armonica sounded wonderful—when it could be heard. So, alas, Franklin's marvelous invention was ultimately abandoned.