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He described his repeated efforts to make the phonograph reproduce the aspirated sound, and added: "From eighteen to twenty hours a day for the last seven months I have worked on this single word 'specia. I said into the phonograph, 'specia, specia, specia, but the instrument responded, 'pecia, pecia, pecia. It was enough to drive one mad! But I held firm, and I have succeeded."
Edison in describing his repeated efforts to make the phonograph reproduce a sibilant sound, says, "From eighteen to twenty hours a day for the last seven months I have worked on this single word 'specia. I said into the phonograph 'specia, specia, specia; but the instrument responded 'pecia, pecia, pecia. It was enough to drive one mad. But I held firm, and I have succeeded."