#part.tune__voice  the melody carried by a particular voice or instrument in polyphonic music; "he tried to sing the tenor part"
  supertype:  #tune__melody__air__strain__melodic_line__melodicline__line__melodic_phrase__melodicphrase  a succession of notes forming a distinctive sequence; "she was humming an air from Beethoven"
  subtype:  #primo  the principal part of a duet (especially a piano duet)
  subtype:  #secondo  the second or lower part of a duet (especially a piano duet)
  subtype:  #voice_part__voicepart  a part written for a singer
     subtype:  #canto.voice_part  the highest part (usually the melody) in a piece of choral music
  subtype:  #musical_accompaniment__musicalaccompaniment__accompaniment__support  a subordinate musical part; provides background for more important parts
     subtype:  #descant  a decorative musical accompaniment (often improvised) added above a basic melody
     subtype:  #vamp.musical_accompaniment  an improvised musical accompaniment
  subtype:  #bass_part__bass  the lowest part in polyphonic music
     subtype:  #ground_bass  a short melody in the bass that is constantly repeated
     subtype:  #thorough_bass__basso_continuo__bassocontinuo  a bass part written out in full and accompanied by figures for successive chords
     subtype:  #figured_bass  a bass part in which the notes have numbers under them to indicate the chords to be played

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