These two are imperfect but might give you an idea. They use 1/x or reciprocal curves, which on the face of it are cheap and easy, but in practice messy because they tend to infinity as x->0 so need lots of ass wiping.
On Fri, 27 May 2011 17:24:33 +0200 Stephan Elliot Perez dreamoftheshoreofanotherworld@gmail.com wrote:
Greetings, I wish to produce a wave form with the opposite form of the normal ead~ wave (the curves become exponentially steeper instead of flatter), which I can achieve by entering a negative number into the phasor in hard off's exact-ead~ patch, which I downloaded from the archive. However, I still want to be able to independently change the length of the ascent, decline, and distance between waves as is possible with ead~. Does anyone know how I could do this, or possibly have access to an abstraction-version of ead~?
Best regards, Stephan