The idea of the plug-in is that an arbitrary function "f(x)" may be entered, and the plug-in will generate a waveform by evaluating the expression for a given range of "x".
This version of the plug-in takes its default expression from dmonty's initial enquiry:
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x^3 * e^(sin ( x * 3)) * 0.00001
I'm sure some user's would like to be able to enter the expression in this familiar arithmetic form, but I'll leave that for someone else to write. To use this plug-in, the expression must be written as a LISP S-Expression. This allows us to use Nyquist's built-in evaluation function rather than having to write a whole new parser. Taking the example above and writing it as a Nyquist / LISP expression:
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(* x x x (power (exp 1.0) (sin (* x 3))) 0.00001)
Some things to note:
Euler's number "e" is not defined in Nyquist, but can easily be derived using the EXP function.
For x^3, we could write (power x 3.0) but as we are also performing multiplication, it is as easy (and a bit shorter) to simply multiply three x's.
A plot of this expression can be created with WolframAlpha
https://www.wolframalpha.com/input/?i=p ... in+(+x+*+3))+*+0.00001,+x%3D0+to+33
and with the Expression Generator plug-in:
and here is the plug-in:
Installation instructions are as usual: http://manual.audacityteam.org/man/effe ... st_effects
For more information about Nyquist, see: http://wiki.audacityteam.org/wiki/Nyquist