kernel_downsample2 & kernel_upsample2 are the same.

[diff7]

These two functions are identical.
Not sure if it was made with an intention.

denoiser/denoiser/resample.py

Line 34 in 84a5c00

def upsample2(x, zeros=56):

[adefossez]

good catch, it is not made on purpose but it turns out to be true.
Both are an implementation from https://ccrma.stanford.edu/~jos/resample/

[diff7]

Got it! I close it as understandable ))