Simple sample rate interpolation using sinc. Allows for smooth variable sample rates (hold time, changing period, hold time).

Example: interp -i "file.wav" -s 0.8 -e 1.0 -d 1.2 -H 0.8 "outfile.wav"

I built with the following on Windows with gcc: cmake -DCMAKE_BUILD_TYPE=Release -GNinja .. cmake -build .