How do you do bicubic (or other non-linear) interpolation of re-sampled audio data?
My favorite resource for audio interpolating (especially in resampling applications) is Olli Niemitalo’s “Elephant” paper. I’ve used a couple of these and they sound terrific (much better than a straight cubic solution, which is relatively noisy). There are spline forms, Hermite forms, Watte, parabolic, etc. And they are discussed from an audio point-of-view. This is … Read more