The motive of a song and its distinctive rhythm were determined by the emotion evoked by the dramatic circumstance. The simplest resultant of this directive emotion in music is a pulsating rhythm on a single tone. Such songs are not random shoutings, but have a definite meaning for those who sing and for those who listen, as in this Navaho ritual song.
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From this extremely simple expression the growth of the musical motive can be traced in these Indian songs through the use of two or more tones up to the employment of the full complement of the octave.[12]
A PRAYER FOR RAIN.
Mexico. Tarahumare.
From Dr. Carl Lumholtz.
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