Artificial intelligent assistant

unmodulated

unˈmodulated, ppl. a.
  (un-1 8, 5 b.)

1815 Jane Austen Emma iv, The uncouthness of a voice..wholly unmodulated. 1861 [Mrs. A. J. Penny] Romance Dull Life xx. 150 He answered with a short and unmodulated monosyllable. 1866 Livingstone Last Jrnls. (1873) I. xi. 292 A low unmodulated guttural drawl.

Oxford English Dictionary

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