Harmony and dissonance
All these examples presume "default" harmony, i.e. seconds and sevenths dissonant.
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reduce dissonance using trills
An ad-hoc method to lessen dissonance (i.e. chords containing intervals of 1 or 2 semitones):
With a lot of good will, the trills may be considered a stylistic or virtuoso element.
becomes 
becomes 