What I want to do
We turned off "smoothing" a while ago on the capture interface for Spectral Workbench to speed up the interface, but it's still a useful post-processing tool. I wrote a quick macro (using the Spectral Workbench API) which reproduces smoothing and is configurable. It doesn't yet save, but if it's a popular request, I can add that.
My attempt and results
You can use this macro by clicking "Tools" to the bottom right of the graph in Spectral Workbench, and then "Macros/Scripting". The macro should be near the bottom of the list.
Here's the macro on Github: https://gist.github.com/jywarren/6040039
Here's a video of using the macro: