HI,

do you need the graphics for your application?
No, I'm trying to design a op-amp filter and then convert that to code
to use in an audio program I'm working on. I have a few FIR and IIR
filters working, but the filter I'm working on now is a little
unusual, so I'm trying to get it working in an electronic circuit
simulator first, then make a dsp version.

thanks
Jeff