When I strike and hold any one of keys E4-G4 on my new Roland HP 704 in "Mellow Piano" setting, I hear an apparent upward drift in pitch of a semitone. When two adjacent keys are struck & held the beat note between them decays as expected, but the upper note, a semitone higher, remains as it decays more slowly. It therefore appears that the adjacent upper semitone is excited when the lower key is struck & then decays more slowly. Is this endemic to the Roland HP 704? Can it be fixed?!
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2Best fix on your new Roland is to return it to the seller– TimCommented Jul 7, 2022 at 13:25
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3Have you verified the drift of a single key by using a digital tuner or reference pitch? (Either are available as a mobile application.) Also, check p. 18 of the manual. Maybe it's the duplex scale setting (sympathetic strings.)– TheodoreCommented Jul 7, 2022 at 13:41
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