Descant

n.	1.	(Mus.) Originally, a double song; a melody or counterpoint sung above the plain song of the tenor; a variation of an air; a variation by ornament of the main subject or plain song. Twenty doctors expound one text twenty ways, as children make descant upon plain song. - Tyndale. She [the nightingale] all night long her amorous descant sung. - Milton.
	2.	A discourse formed on its theme, like variations on a musical air; a comment or comments. Upon that simplest of themes how magnificent a descant! - De Quincey.
v. i.	1.	To sing a variation or accomplishment. [imp. & p. p. Descanted; p. pr. & vb. n. Descanting.]
	2.	To comment freely; to discourse with fullness and particularity; to discourse at large. A virtuous man should be pleased to find people descanting on his actions. - Addison.

Noun	1.	descant - a decorative musical accompaniment (often improvised) added above a basic melody Synonyms: discant
Verb	1.	descant - sing in descant
	2.	descant - sing by changing register; sing by yodeling; "The Austrians were yodeling in the mountains" Synonyms: yodel, warble
	3.	descant - talk at great length about something of one's interest

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