Viola: Harmonics, Glissando & Vibrato
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The first five harmonics shown here are natural harmonics, produced by lightly touching the string at a node that exists where the notated pitch is located. These 2nd through 5th partials (which are shown here on the G string) can be played as natural harmonics on all 4 strings (transposed relative to the open string). The last 8 harmonics are artificial "touch 4" harmonics (sounding 2 octaves above the stopped note), created by lightly touching a perfect 4th above a stopped note on the same string.
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