harmonic       
 adjective uk/hɑːˈmɒn.ɪk/ us/hɑːrˈmɑː.nɪk/
 (音乐)和声的
relating to harmony (= a pleasant musical sound made by different notes being played or sung at the same time)
  Jazz pioneer Ornette Coleman was a harmonic and melodic innovator.
 harmonic complexity 和声的复杂性 
 - More examples
 - The composer restricts himself to a fairly narrow harmonic and rhythmic palette.
 - Jazz instrumentalists are known for their feats of melodic and harmonic invention and technical virtuosity.
 - Dissonant harmonic clashes heighten the expressive power of the piece.
 - The ancient Greeks realized that the harmonic intervals of their musical system reflected fundamental mathematical proportions.
 
harmonic       
noun [ C ] uk/hɑːˈmɒn.ɪk/ us/hɑːrˈmɑː.nɪk/
 music specialized(音乐的)泛音 
a special note that sounds when a musical note is played that is different from the main note
  The overtones and harmonics create a very rich sound.
 As with any guitar string, there is the fundamental and the harmonics.
 Compare: fundamentalovertone
 - More examples
 - These harmonics generate a sound somewhere between a roar and a musical chord.
 - He had a way of playing harmonics on his guitar in which the sound had an ethereal quality.
 - A complex sound has, in addition to the fundamental frequency, overtones or upper harmonics.
 - In the first movement, the oscillations contain both fundamental tones and harmonics.