Hi,
I don't know what a cubic spline is, but I would be also interested. Currently I use a patch Thomas Grill made ages ago "smooth" that does low-pass filtering of control data. Gerda, what are you filtering? control data or sound?
I am not filtering. So far I have the signal as control data-the time domain-uniformly sampled point. I would like to get the whole data through a function(spline interpolation) that spaces the signal points non-uniformally (some sort of nonlinear resampling).
Best, Gerda