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Nonharmonic Tones
 
Within the context of tonal music, any pitch that is not heard as a member of the prevailing harmony (chord) is considered a nonharmonic (nonchord) tone.

The common nonharmonic tones are usually identified as belonging to one of eight categories.  Each is labeled based on two criteria:
     How it is approached (the pitch that precedes it)
     How it is resolved (the pitch that follows it)
 
Following is a table that indicates this criteria for each type of nonharmonic tone.


Note:  A Neighbor Group is a variation of a simple Neighbor Tone.  The NG is a lower neighbor (below the chord tone) and an upper neighbor (above the chord tone) in combination.  The order of the upper and lower neighbors can vary.
 
Examples
Passing Tone


Neighboring Tone


Neighbor Group


Appoggiatura


Escape Tone

 
Anticipation

 
Suspension

 
Retardation

 
Pedal Point