I'm working on a pitch modification plugin involving resampling, and want the quality to be as high as possible.
I currently use windowed sinc interpolation and lowpass filter where required.
I noticed some pitch modification plugins offer an "oversampling" option, but I don't understand its purpose.
To me it seems oversampling would give similar results to windowed sinc interpolation.
I also don't understand where oversampling takes place in the order of operations (whether it occurs before or after lowpassing, etc.)
Any help or articles on this would be greatly appreciated!