Comment Re:Unsampling ... then re-sampling in 96KHz? (Score 2) 255
This is incorrect. Interpolating an audio signal using using lerp or Bezier or whatever will introduce auditory artifacts in the upper frequencies of the sound. The only mathematically correct way to upsample a signal is to perform the transformation into frequency space and then resynthesize the signal at the desired frequency with a lowpass filter.
See https://ccrma.stanford.edu/~jos/resample/ for more information on why curve fitting is incorrect.