In recordings from 1954 (immediately after her 80-pound weight loss) and thereafter, "not only would the instrument lose its warmth and become thin and acidulous, but the altitudinous passages would to her no longer come easily." It was at this time that unsteady top notes first begin to appear. Walter Legge, who produced nearly all of Callas's EMI/Angel recordings, states that Callas "ran into a patch of vocal difficulties as early as 1954": during the recording of "La forza del destino", done immediately after the weight loss, the "wobble had become so pronounced" that he told Callas they "would have to give away seasickness pills with every side".