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Question about setting string tension when using a bridge

Posted: Fri Jun 29, 2012 12:35 pm
by David Harrison
Hello,

I'm trying to make a lyre, using harp strings.

I've got a nice program that lets me enter the information about the note I want, string material, length and diameter and gives me results about the tension.

What i'm a bit confused about is when it comes to me using a bridge. So I will have two string lengths, one is total and the other is vibrating length.

With the program do I work to my vibrating length or to total length? Will the program still work like this?

If anyone could help that would be great.

Thanks

Re: Question about setting string tension when using a bridge

Posted: Fri Jun 29, 2012 1:21 pm
by Mark Swanson
I don't know what program you are using so I can't speak to that, but you need to be concerned with the vibrating length of the string. The other length has no bearing.

Re: Question about setting string tension when using a bridge

Posted: Fri Jun 29, 2012 9:03 pm
by Clay Schaeffer
Hi David,
Your program should work fine. As Mark said it is the vibrating length you will use for your calculations. The bridge is stopping the string much as a fret would do on a guitar.

Re: Question about setting string tension when using a bridge

Posted: Mon Jul 02, 2012 11:34 am
by Jon Whitney
Can you share the name of the program? If it is freeware could you send it to the sysop to be put on the software library pages for download?

Re: Question about setting string tension when using a bridge

Posted: Fri Jul 13, 2012 9:35 am
by David Harrison
Thanks for the replies. I can't remember the name of the program but I'll find out and post back with it.

Re: Question about setting string tension when using a bridge

Posted: Fri Jul 13, 2012 12:07 pm
by David Harrison
The program is here http://www.harpkit.com/mm5/merchant.mvc ... nganalysis

I had to actually do a paypal transaction of 0.00 to get it. I might not have done this correctly though. Though its for harps, I think its also compatible for other instruments, you can select which string material as part of the process.