tone, Deckton. A prominent, in many instances repeated,
note that sounds above the register of the fundamental
line or main linear progression.
In some instances a cover tone can be mistaken for the Kopfton,
but the voice-leading structure should make the distinction clear.
The example, from Variation 9, shows a cover tone B$
in mm. 1-2 and another cover tone, D in mm. 3-4.