Changing tones

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In music, changing tones (also called double neighboring tones and neighbor group) consists of two consecutive non-chord tones.{{Cite book |last=Lobe |first=Johann Christian |url=https://books.google.com/books?id=ClgGAQAAIAAJ |title=Catechism of Composition: By J. C. Lobe |date=1891 |publisher=G. Schirmer |pages=63–65 |language=en}}{{Cite book |last=Franceschina |first=John Charles |url=https://books.google.com/books?id=ia2gCQAAQBAJ |title=Music Theory Through Musical Theatre: Putting it Together |date=2015 |publisher=Oxford University Press |isbn=978-0-19-999955-2 |pages=126–127 |language=en}} The first moves in one direction by a step from a chord tone, then skips by a third in the opposite direction to another non-chord tone, and then finally resolves back to the original chord tone. Changing tones appear to resemble two consecutive neighbor tones; an upper neighbor and a lower neighbor with the chord tone missing from the middle. The changing tone functions as a way to decorate, or embellish, a chord tone and are also used to provide rhythmic interest between common tones. In rare instances, changing tones can be heard as musical cryptograms, such as the cruciform melody.