| 摘要 |
PROBLEM TO BE SOLVED: To prevent unauthorized copying of an adding, revising program by storing the added musical sound data and an up version program in the same external storage medium. SOLUTION: The waveform data added to the basic waveform data stored in a waveform memory are stored in an expanding external storage medium 10, and a new version program improving a controlling program written in an internal storage means 3 is stored also. At this time, when a user purchases the expanding external storage medium 10, and loads it on a loading means 2 provided on an electronic musical instrument 1 main body, and turns a power source on, first of all, the new version of the controlling program is loaded on the internal storage means 3. Then, an old version control program written in the internal storage means 3 until then is abandoned, and the new version program is written in. |
