Raven shouldn't be that loud at all. The gecko is way louder
I don't know if i can say this without revealing the secret but it you hook it to your shirt so it comes out the bottom and put another shirt over that then you don't have to wear any type of jacket. That's the way i do it and i prefer it that way.
Perhaps a moderator can move the thread. This is a Raven that I made from an I.D. zip. I am doing it right, however, it is making an audible "Zip" sound.