[DJ FC]

Tune comes from tone.

intonation

1610s, "opening phrase of a melody," from Fr. intonation, from M.L. intonationem (nom. intonatio), from pp. stem of intonare (see intone). Meaning "modulation of the voice in speaking" is from 1791.

intone

late 14c., entunen "sing, chant, recite," from O.Fr. entoner "sing, chant" (13c.), from M.L. intonare "sing according to tone," from L. in- "in" (see in- (2)) + tonus "tone," from Gk. tonos (see tenet). A different verb intone was in use 17c.18c., from L. intonare "to thunder, resound," figuratively "to cry out vehemently," from tonare "to thunder."

tune

late 14c., "a musical sound, a succession of musical notes," unexplained variant of tone. Meaning "state of being in proper pitch" is from mid-15c.; the verb in this sense is recorded from c.1500. Non-musical meaning "to adjust an organ or receiver" is recorded from 1887. Verbal phrase tune in in reference to radio (later also TV) is recorded from 1913; figurative sense of "become aware" is recorded from 1926. Tune out "to eliminate radio reception" is recorded from 1908; fig. sense of "disregard, stop heeding" is from 1928. Tunesmith is a U.S. colloquial coinage first recorded 1926.

tone

mid-14c., from O.Fr. ton (13c.), from L. tonus "a sound, tone, accent," lit. "stretching" (in M.L., a term peculiar to music), from Gk. tonos "vocal pitch, raising of voice, accent, key in music," originally "a stretching, taut string," related to teinein "to stretch" (see tenet). Sense of "manner of speaking" is from c.1600. First reference to firmness of body is from 1660s. The verb meaning "to impart tone to" is recorded from 1811.