Walter Welch, 94, an authority on Thomas...

THE BALTIMORE SUN

Walter Welch, 94, an authority on Thomas Edison and early sound recordings, died of Alzheimer's disease Friday in Albany, N.Y. In 1963, he founded Syracuse University's Belfer Audio Laboratory and Archive, the largest sound archive at any U.S. university. He was its director until 1983 and curator until 1991. His books include "From Tin Foil to Stereo," a history of sound recording; and "Charles Batchelor, Edison's Chief Partner."

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