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Continue to ChatGrand telegraphic discovery today … Transmitted vocal sounds for the first time ... With some further modification I hope we may be enabled to distinguish … the “timbre” of the sound. Should this be so, conversation viva voce by telegraph will be a fait accompli. - Alexander Graham Bell from https://whatsmyquote.com/quote/grand-telegraphic-discovery-today-transmitted-vocal-sounds-for-the-first-time-with-some-further-modification-i