Wiktionary
duetting
vb. (present participle of duet English)
Wikipedia
Duetting
To duet is the verb derived from the noun duet, and means to perform a duet, a musical composition for two voices or two performers.
The verb and its participle duetting are often used to describe animal communication, where the male and the female of a species, especially birds, communicate by singing. This may be used as a warning, a mating call or for any other purpose.
Usage examples of "duetting".
I shall miss my sober comrade: got the habit of duetting: and he's gentle, bears with me.
Up on the raised stage, the Dolly gave way to a Madonna and a Britney, duetting on “I Got You Babe.