I couldn’t find any tutorials on YouTube which give you audio examples straightaway, they come with all sorts of explanations first instead of digging into what you actually get. I found a loop here https://freepd.com/music/Bit%20Bit%20Loop.mp3 and I used a section of it for some examples: loop1 is unedited, loop1-lp500 has a low pass at 500 Hz and loop1-hp2000 has a high pass at 2000 Hz. Both filters are second-order and neither are resonant.
audiofilterexamples.7z (3.0 MB)