Tuning with an Electric Engraver

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    AvatarAlan Brinton
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    I have suspected for a long time that factory tuning of high end melodicas and keyboard harmonicas is done with and electric engraver or something like it. Finally, I have tried it with an inexpensive variable speed engraver:

    I believe this is the way to go. My experience is reported here:

    Suzuki Soprano 25 (1970s)

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