D defs.my
Entry 2 senses Webster, 1913

Attune

/ət-o͞on'/ · At·tune · IPA /əˈt(j)un/
01 v. t. To tune or put in tune; to make melodious; to adjust, as one sound or musical instrument to another; as, to attune the voice to a harp.
imp. & p. p. Attuned; p. pr. & vb. n. Attuning
  1. 1.
    To tune or put in tune; to make melodious; to adjust, as one sound or musical instrument to another; as, to attune the voice to a harp.
  2. 2.
    To arrange fitly; to make accordant.
    “Wake to energy each social aim, Attuned spontaneous to the will of Jove.” — Beattie.