Oh... Man... I admit that I want to use M&M's as poop source because they got lotsa funny jokes and scenes to exploit, but I never got around them. Your youtube poop involving ear-rapes and repeats reminds me of a combo style involving Geibuchan, Awful Fawful, Trudermark, and me! Also.. I LOLED at the SANTA CLAUS commercial part at pitch shift and bit-crush like loud volume.
Its the same as pitch shifting a one second audio clip. The buzzing sound I did was 4 shorter audio clips that make up one second. For each second, all 4 clips are at the same pitch. For example, 4 clips are at the pitch shift of 1. The next 4 that make up the next second are at the pitch shift of 2, and so on.
I don't have the exact song title, but it is from an M&M's commercial in this compilation: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6bJuOIbrWXk.html Starts at 7:54.