McDonald's will state "ba da ba ba ba" is only a catchy jingle. BUT. it may be some sort of secret hypnotic tone, or satanic chant...If they are part of some satanic cult...Much like Ab Bra Ca da Bra was originally a healing chant!
Bam Bam Bumbum Bam Bam Bumbum Ba Ba Bam Ba Bam Ba Bu Bi Bubu
your probs trying to find a song welp i think its the like weddin song when your walkin down the aisle but i dont know where you can find the song so keep searching!