I chose to use a spline rather than expression nodes primarily to reduce CPU usage. Small changes in the position and number of the control points can have a fairly dramatic effect on the sound. I tried to mimic the diagram in the paper to approximate the Buchla sound, but other configurations also work well. I intend to use this as a building block for a complex oscillator in the Buchla style. @RobertSyrett has posted some excellent west-coast style synth modules and I hope to follow in his footsteps.
West Cat Oscillator
1-Toast (after the 0-Coast)
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