Sound post in classic guitar to stop string buzz

[Mel Fulks]

Thanks for your interest, Stan. I hope you have also read the preceding thread on fret filing ,where the conversation started. I think
"string whip " might be a better description. It's worst with the open bass strings. The note is heard ,THEN loud buzz. it's common on guitars with thin under braced tops. One of those opposite but equal reaction things. The strings move the top too much so the top whips the string causing a "wave" that crashes into frets. It's often seen as a fret problem ,but it is not.

[Stan Calow]

Thanks Mel. Yes I read the fret filing thread. I have guitars, and have done some small repairs on some instruments, hence the interest. I had not heard of sound posts before. I had always thought that buzzing from the top could only be due to loose braces, so glad for the education.

[Jim Creech]

The only time I have heard a classical guitar "Buzz" it turned out to be a loose brace. Is it possible this is what you are hearing?

[Mel Fulks]

Not what I've heard many times in a good number. I've found that it's the player who is bothered by it ,not the audience.
I don't think all those Flamenco guitars have loose braces ,and the guys who play the guitars know that the stomping and such covers a lot of it. I am not the only guy saying those guitars buzz more,it's ruitinely noted it every written comparison of the Flamenco and classic guitars that I've seen. Someone will try a sound post and report. As I wrote at start they have been used in guitars. I'm guessing string slap buzz was the reason. Again,if you can stop it by putting a little light pressure on outside of the top I don't think it unreasonable to think that a little pressure on the other side would do the same thing.

[Mel Fulks]

Delighted to see so many views! Don't know why I never thought of using a sound post years ago when I was routinely adjusting guitars. Want to add that a few times after I told someone that the buzz could not be adjusted out they wanted another opinion ,and I encouraged them to do that. None of the attempts were succesful. Some informed me directly other cases I heard from friend who was their instructor. And Yes, I always checked for loose bracing.