Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun Dec 01, 2024 7:10 pm


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 9 posts ] 
Author Message
PostPosted: Wed Aug 28, 2019 8:34 pm 
Offline
Koa
Koa

Joined: Fri Feb 24, 2017 8:43 am
Posts: 1707
I have a Yamaha ls-Ta which I really like! I did a good set up on it Ian’s it plays like a dream BUT.....

When I voice the b string on the 5th fret for an e note my A string resonates the e, which gives a strange sound imo.

What is going on?
How can I fix this?

Ideas?



Sent from my iPhone using Tapatalk


Top
 Profile  
 
PostPosted: Wed Aug 28, 2019 10:40 pm 
Offline
Koa
Koa

Joined: Wed Feb 17, 2016 8:54 am
Posts: 854
State: Texas
Country: United States
Focus: Repair
That is an overtone/harmonic. Some people call them sympathetic resonances. There is nothing you can do to eliminate them except remove the A string. Every single guitar has these and they are a normal part of a guitar.

For example, leave all the strings open and play the high E by itself all the way up the board, you will hear the other strings light up on various notes. Resophonic guitars do this to a higher degree than regular wood bodies.



These users thanked the author DanKirkland for the post: Hesh (Thu Aug 29, 2019 12:10 am)
Top
 Profile  
 
PostPosted: Thu Aug 29, 2019 4:52 am 
Offline
Koa
Koa

Joined: Sun Apr 25, 2010 4:46 pm
Posts: 527
First name: Mark
Last Name: McLean
City: Sydney
State: New South Wales
Zip/Postal Code: 2145
Country: Australia
Focus: Build
Status: Amateur
Dan is right. Harmonic vibrations happen all over the place. Sometimes a tuning machine will start to buzz, but only when you hit a B flat note. Wolf tones happen because your soundboard has an inbuilt sympathetic resonance of G#, or whatever. Some of these can be eliminated. The tuning machine might quit buzzing if you tighten it’s screws, or lubricate its gears. You can alter soundboard resonance by adding or subtracting weight, or adding mass to the sides. Your string sympathetic resonance might be less annoying if you use different gauge strings, or slightly alter the scale length of that string at the nut or saddle.


Top
 Profile  
 
PostPosted: Thu Aug 29, 2019 5:32 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Dec 17, 2013 10:52 pm
Posts: 3077
First name: Don
Last Name: Parker
City: Charleston
State: West Virginia
Zip/Postal Code: 25314
Country: USA
Focus: Build
Status: Amateur
Not being there in person hinders the ability to be really helpful, but here’s a thought: try muting the strings in the area between the nut and the tuners by sticking some felt in there, or by applying a capo very lightly right behind the nut. It is sometimes the case that the resonances referenced above are picked up in that area. Since you don’t have your hands up there to mute the strings that are reacting to what you are playing (which is what a player would normally do to stop such extraneous sounds), you need something else to stop the ringing. I don’t know if that is what is happening, but I see it often enough to mention it as a possibility to eliminate.


Top
 Profile  
 
PostPosted: Thu Aug 29, 2019 6:09 am 
Offline
Koa
Koa

Joined: Fri Feb 24, 2017 8:43 am
Posts: 1707
doncaparker wrote:
Not being there in person hinders the ability to be really helpful, but here’s a thought: try muting the strings in the area between the nut and the tuners by sticking some felt in there, or by applying a capo very lightly right behind the nut. It is sometimes the case that the resonances referenced above are picked up in that area. Since you don’t have your hands up there to mute the strings that are reacting to what you are playing (which is what a player would normally do to stop such extraneous sounds), you need something else to stop the ringing. I don’t know if that is what is happening, but I see it often enough to mention it as a possibility to eliminate.


I’ll try something like this. I understand that it happens all the time, but this time it almost sounds like feedback (and no I’m not plugged in:))... it’s just annoying


Sent from my iPhone using Tapatalk


Top
 Profile  
 
PostPosted: Thu Aug 29, 2019 7:30 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sun Mar 30, 2008 8:20 am
Posts: 5968
Usually sympathetic vibrations are not annoying, but if it is giving a sitar like sound it may be a poorly cut nut slot.


Top
 Profile  
 
PostPosted: Thu Aug 29, 2019 8:31 pm 
Offline
Koa
Koa

Joined: Fri Feb 24, 2017 8:43 am
Posts: 1707
Clay S. wrote:
Usually sympathetic vibrations are not annoying, but if it is giving a sitar like sound it may be a poorly cut nut slot.

This is possible! I adjusted the slots . I did use proper width files and ramp them... what constitutes a poorly cut a slot ?


Sent from my iPhone using Tapatalk


Top
 Profile  
 
PostPosted: Fri Aug 30, 2019 5:23 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Dec 17, 2013 10:52 pm
Posts: 3077
First name: Don
Last Name: Parker
City: Charleston
State: West Virginia
Zip/Postal Code: 25314
Country: USA
Focus: Build
Status: Amateur
Here is something I do when cutting and deepening nut slots: Assume the headstock is at a 15 degree angle relative to the fingerboard. I try to have the nut file sit at an angle that is half that. If I try to keep the file sort of equidistant from the headstock and the fingerboard, it usually works out, even if the slot is rounded a bit, due to my inability to keep a constant angle. If, however, I were to allow the file to become parallel to the fingerboard, there is always a risk that it doesn't stay completely parallel, and dips down toward the fingerboard too much. Even a little bit of that is a problem, because it allows the front face of the nut to be slightly below where the string exits the slot, and that gives you the buzzing, sitar-like noise. Maybe this is obvious, but this is how I do it, and I don't have the buzzing problem. This way, all my "angle error" still gives me a slot that is angled toward the headstock a bit.



These users thanked the author doncaparker for the post: SnowManSnow (Fri Aug 30, 2019 7:04 am)
Top
 Profile  
 
PostPosted: Fri Aug 30, 2019 6:46 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sun Mar 30, 2008 8:20 am
Posts: 5968
Also assuming the slot has a rounded bottom (as it should using a nut file) it doesn't hurt to have a slot a few thousands wider than the string so there is no chance it will get pinched in the slot and be held above the bottom. Rolling the file side to side a little bit can widen the slot enough to do this.



These users thanked the author Clay S. for the post: SnowManSnow (Fri Aug 30, 2019 7:04 am)
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 64 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com