It's been awhile since I made something like this. I took a bunch of belching videos that I had done and I cut out all the extra stuff. Making what was left, was burps only. One after another after another after another. Bassy, loud, long, short, bubbly, pitchy, rumbly, etc etc. I nice variation of at least 100 burps (I think). Burp, burp, burp, burp, buuuuuuuuuurp!