Violin Forum/Message Board

[Dave Chandler]

REally enjoying the free "audacity" program from a link provided in www.platetuning.org. Wish I had started using it when the back plate was still free. All I remember was Mode 5 sounded like E at the time, comparing it with a strung up instrument. With ribs attached its now at 302 hz (D4). Not sure there's a way to work backwards from the "with ribs" tap tone to find the back's Mode 5 with any accuracy.

The program is really cool, you can see all the harmonics happening, and its surprising to see the same harmonics on the spruce and in the maple too. I've saved some of the displays for future reference.

The programs been really helpful with trimming my bass bar, and checking Mode 5 on my top plate (at F 347hz) almost F# so I think I'm in the ball park -- back at E (?) and top near F#.

I tapped down the bass bar at 4cm increments, mostly around 385 hz (F# almost G) with deviation of about 5 hz except one spot was about 5 hz high, took a couple thin slices with exacto knife, now its about 5 hz low so stopped there before I made it any worse. Does this sound about right? Or should I go for zero deviation, I mean now were talking using sandpaper to take a little off here and there. Should I get the bass bar down to the top's tap tone of 347hz, or is it just important that it be consistant along the length? How accurate is accurate? What's the standard?

Some more stats -- back with ribs weighs 160gr, top with f holes and bass bar is at 65 gr.

Is it time to close it up?
_________________
Dave in the Blue Ridge
Southern Violin Association

"Success is the ability to go from one failure to the next with no loss of enthusiasm" Winston Churchill

"I took the road less travelled, and now I don't know where I am." Marco Polo

[Mat Roop]

Nice link... thanks Dave!... Mat