The build_audulus_spline_node command will build using CSV input (no header, two columns containing x and y values) in addition to the current WAV file support
The CSV values are pretty forgiving, so you can just throw numbers at it and see what sticks. It sorts and scales them appropriately for the spline node.
Changed the name of the gem to build_audulus_nodes, so now you install with sudo gem install build_audulus_nodes