| When swithing POWER ON, press together three buttons DIGITAL DRAWBARS - ACCORDION REGISTER - GM-SPECIAL Verify the version by reading LED indicators as below X=LED LIGHT ON |
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| VERSION | PIANO | GUITAR | STRING | BRASS | FLUTE | SAX |
| 1 | O | O | O | X | X | O |
| 2 | O | O | X | O | X | O |
| 3 | O | O | X | X | X | O |
| 4 | O | X | O | O | X | O |
| 5 | O | X | O | X | X | O |
| 6 | O | X | X | O | X | O |
| 7 | O | X | X | X | X | O |
| 8 | X | O | O | O | X | O |
| Value | (8) | (4) | (2) | (1) | (0) | - |
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From version 9 on the indication is given at the LCD screen at lower right corner Ver 9 = Ver 9 Ver A = Ver 10 Ver B = Ver 11 etc |
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