descant

nouns

a decorative musical accompaniment (often improvised) added above a basic melody

descant, discant

sing in descant

descant

is a type of (narrower)

produce tones with the voice

"She was singing while she was cooking"; "My brother sings very well"

sing by changing register; sing by yodeling

"The Austrians were yodeling in the mountains"

descant, warble, yodel

talk at great length about something of one's interest

descant

is a type of (narrower)

to consider or examine in speech or writing

"The author talks about the different aspects of this question"; "The class discussed Dante's `Inferno'"