I have a bow that is louder             than I'ld like, it has a D97 string (14 strand,  52 @ 27 10+ grains pre inch arrow weight)I've tryed wool , cat whiskers (and even a combo of the above).  Is there a quieter      fast flight string or strand count.

I have a 9 strand padded loop UltraCam string on one of my longbows with a set of 1/2 size Hush puppies on it.Not really sure how it compares to all the other materials,but it's so quiet I wouldnn't even bother trying anything else.

Try getting a D97 string with less strands,that may help.A 12 strand D97 is strong enough for up to a 100# bow.I shot a 12 strand D97 on a 83# DQ Longhunter and 73# 21st Century.I shoot a 8 strand D97 on my bows under 60# and find 8 strands quieter then a 12 strand.Sometimes it depends on the bow,I have had bows quieter with D97,some with 450+ and some with 8190.

Is it a recurve or a longbow?

I'm with John on this one.... It depends on the bow. Having said that, of the FF materials that I've tried, D97 has never been the quietest on any of my bows. 452x, Ultracam, 8125G, and 8190 beat D97 in every area except price for me.

Take care,
Jason

Never tried D97 but XS2 is quieter than D10 and 8125 for me.

The only thing that quiets a ff string is cranking up the brace height, which also defeats any performance gain. You'll probably just have to live with some noise.

D10, Ultracam, and 452x all should do you better than D97.  Also go skinnier.  If a recurve some noise is just part of life.  Only thing I have found to definitely quiet a recurve is skinny string combined with wool wrapped string ends, soft Velcro in the string grooves, string silencers and maybe high end of brace height range.  Then throw in a 9+ gpp arrow and I've gotten a few recurves just about longbow quiet that way.

I would say it depends on the bow, and how well the set up is tuned.

How the string is made and how the bow is tuned will usually make a lot more difference than the material it's made from.

I shot 14 strands of Dynaflight '97 for years and got lots of comments on how quiet my bow was, and had lots of customers tell me how quiet their bows were with the same.  My draw weight was 66#@30.5".

Padded loop Flemish strings are generally quieter.  Moderate strand counts work best for me--for your bow I'd go with 12 strands, loops padded to 18 if using Dynaflight '97.

My favorite material right now is 8190.  18 strands with 22 in the loops for most bows--still a pretty small diameter string because the strands are so small.

Nock fit is important--too tight adds noise and can cause tuning problems.

Your release matters--the better it is, the quieter.

If your arrows aren't matched to your bow, they can add noise.

Is the bow tillered for your release?  I.E., in your pic you are shooting 3-under--is the bow tillered for 3-under?  That can make a difference in noise.

Silencer type and placement will affect noise.  I like cat whiskers, tied on around the string so they can be tuned, and cut short into little balls.  Left too long, they can make their own little slapping noise.

I start with a "naked" string.  Find the sweet spot in the brace height, where you get the least noise and vibration.

Add silencers, and move them around.  You'll find there is a sweet spot for them as well.  Be sure they are put on correctly, and you don't use too much--too much of some materials can be noisy.

There is no "magic" string material, any more than there is a magic bow or arrow or broadhead.  Sometimes it just takes some extra tinkering.  I've never had to go to extremes to get a bow quiet.

Try some limbsavers.  You will be surprised how well they work.