This article talks about the ascendant and descendant tones. Jos Smits van Waesberghe introduces in his book, "Het Biologisch-Muzisch Ritme," the terms ascendant and descendant for energy directed upward and downward in language and music. According to the author, the ascendant movement of van Waesberghe can only exist because after each raising, there is a basis on which one can push up again.