Re: JI, ETs, and special

A thought I've had as to why chords and even
melodic steps in just intonation or very close to
it might, at some emotional level "ring truer" than
others not so tuned is that evolutionarily we are
attuned to the voices of other humans. The sounds
of the human voice, which are horn-like sounds, have
integer ratio partials (unlike piano string tones
where the partials are stretched). A sound in which
the partials weren't harmonic would immediately be
detectable as not being of human origin. Perhaps these mechanisms are called
into operation when we hear musical sounds so that chords in just intonation,
while not "natural", nevertheless at some level have a more "natural"
emotional impact than do chords in which the note frequency ratios depart
more from being just.

>A thought I've had as to why chords and even
>melodic steps in just intonation or very close to
>it might, at some emotional level "ring truer" than
>others not so tuned is that evolutionarily we are
>attuned to the voices of other humans. The sounds
>of the human voice, which are horn-like sounds, have
>integer ratio partials (unlike piano string tones
>where the partials are stretched). A sound in which
>the partials weren't harmonic would immediately be
>detectable as not being of human origin. Perhaps these mechanisms are
called
>into operation when we hear musical sounds so that chords in just
intonation,
>while not "natural", nevertheless at some level have a more "natural"
>emotional impact than do chords in which the note frequency ratios depart
>more from being just.

That all makes perfect sense, but melodic steps? Where "in nature" do we
find a human voice proceeding in JI melodic steps???