I shoot "Widows", and they get a bad rap for being loud. I have yet to have game jump the string, and have used fewer silencers on my widows than I did on other bows.
This is what I have learned about silencing bows over the last 42 years. Shoot the bow at the upper end of what the bowyer says is the recommended brace height, sounds simple but some people are always trying to ice skate up hill.
Secondly, shoot at least 10grains per pound of draw weight, regardless of your draw weight. I personally shoot 11 grains per pound in my lighter weight bows.
Select your silencers wisely, yarn, wool, will silence your bows, extremely well, but at a price. They are heavy, they do pick up moisture. Rubber, dampens well, with less weight. I have some friends who shoot their bows without silencers, and they are silent. Longbows are most likely easier to shoot without silencers, but I have had a few recurves that could be shot that way too.
If you follow these rules, you will have a bow that is a quiet as that bow can possibly be.