I reviewed the probable solutions here. Bingo !! Dust under saddle and piezo bar pickup. This Martin HD-28E Centennial Retro guitar with Fishman Aura F1 pickups sounds perfect again. Thank you so much !!

  • 3
    I'm voting to close this question as off-topic because it’s not a question – Timinycricket Mar 25 at 7:24
  • you can answer your own question but the answer should not be inside the question – Timinycricket Mar 25 at 7:51
  • Stack Exchange is not a discussion forum & is not threaded like one. "Thank you" as an answer is not required, nor as a separate question with no way to find the original. Once you have sufficient reputation, you will be able to vote up questions and answers that you found helpful. – Tetsujin Mar 25 at 7:56

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