As Joe Skipp stated before... I discussed this with him many years ago, and like he suggested, I started at "ground zero" and worked my way up. With my old Kodiak Mag, I had lots of noise, and my arrows were porpousing very badly! I worked my way up alittle at a time and things got better! At about 5/8" above center, arrow flight was near perfect, and just a "thump" upon release for noise.
When I had my custom bows built, I had Ed Mikuta tiller them for split finger. (just in case I wanted to change back) Ed agreed, just raising my nock point to shoot 3under would not be a problem.
I have switched back and forth over the years, and I do notice a definate noise differance between split and 3under. My bows are not NOISEY!!! However, with either rubber whiskers or yarnballs, there is definately a "thump" upon release!!! When I drop my nock point and shoot splitfinger, my pows are almost completely silent!
I imagine the noise is probly hardly noticeable, and I imagine my high shield fletching makes as much or more noise as far as game is concerned.....
I've always been a "if it ain't broke, don't fix it, kinda guy" However... Some of the threads about carbon arrows, FOC, Bareshafting, etc. Have got me thinking???
Maybe I just need to find other things, to think about!!!!!