My absolute favorite time for those sounds was during yoga sessions, preferrably during the final relaxation in complete silence when everyone could hear perfectly. 
Dimeticone doesn't help me so much, and I don't want to take loperamide during daytime as it may worsen digestion when the bowel is paralyzed, causing even more bacteria growth and gas.
What troubles me is that I can't pass gas 'on the run' when walking or sitting, there is always fluid with the stool. Even when going to the toilet there is gas remaining inside. I need to lie down afterwards when possible to get it out.