# of key | 1/2 Period | Frequency real | Frequency |
1 | 703uS | 711Hz | C6 1046Hz |
2 | 730uS | 685Hz | B5 987Hz |
3 | 787uS | 635Hz | A5 880Hz |
4 | 850uS | 588Hz | G5 783Hz |
5 | 927uS | 539Hz | F5 698Hz |
6 | 967uS | 517Hz | E5 659Hz |
7 | 1.04mS | 480Hz | D5 587Hz |
8 | 1.15mS | 434Hz | C5 523Hz |
Need to replace resistors and reverse buttons position.
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