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A "parasite" tone

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Re: A "parasite" tone

Postby Alain Lambert » Tue Sep 13, 2016 9:30 pm

Could a compensated nut help to ged rid of that problem?
After all it does change the scale length by a small amount.
This would be easy to try
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Re: A "parasite" tone

Postby Alan Carruth » Wed Sep 14, 2016 2:13 pm

It would be worth a try; almost anything would.
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Re: A "parasite" tone

Postby Massimo Milan » Wed Sep 14, 2016 5:34 pm

Here's an audio clip of sounds taken from 4th and 5th string on 2nd fret
First tone = fingertip right close to the fretwire --> then in the middle of the fret
https://soundcloud.com/memyguitar/zip-tone
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Re: A "parasite" tone

Postby Massimo Milan » Thu Sep 15, 2016 5:16 am

and here a video clip of a spectrogram and waveform of the tones; i could not in any way couple the audio really don't know why, so i put some captions under the waveforms I hope itis clear enough
https://vimeo.com/182827085
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Re: A "parasite" tone

Postby Alan Carruth » Thu Sep 15, 2016 1:29 pm

There sure is some beating going on there!

I'll try to run a spectrum, rather than a spectrogram, and see what I can see.
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Re: A "parasite" tone

Postby Massimo Milan » Thu Sep 15, 2016 5:48 pm

Alan Carruth wrote:"I. On future instruments you'd want to avoid using a really tall saddle, ....


That tall saddle comes from the original project where a one of a kind suspended Bridge had enough room from the top to let the strings pass under and climb from behind to make the knots, but it was unsuccessful and had to be substituted by a differently shaped Bridge.
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Re: A "parasite" tone

Postby Alan Carruth » Fri Sep 16, 2016 9:49 pm

I could not get the sound file off the web site and into the FFT program I've got. Sorry.
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Re: A "parasite" tone

Postby Massimo Milan » Sat Sep 17, 2016 3:22 am

Alan Carruth wrote:I could not get the sound file off the web site and into the FFT program I've got. Sorry.


Please be so kind to try this:
https://dl.dropboxusercontent.com/u/881 ... 20TONE.mp3

(see also my PM)
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Re: A "parasite" tone

Postby Massimo Milan » Sun Sep 18, 2016 10:09 am

Here video and audio coupled, with captions:

Vimeo:
https://vimeo.com/183188346"]https://vimeo.com/183188346

YouTube:
https://youtu.be/t9USFNMDs2I
Massimo Milan
 
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Re: A "parasite" tone

Postby Eirikur Blodax » Thu Sep 07, 2017 11:37 am

Hi all,

I stumbled onto this old topic looking for a solution to exactly the phenomenon you're describing here.
Recently I bought a new guitar, an all solid classical that came with extra hard tension nylon strings,
and I found many of the individual strings in a chord chiming...

After restringing and winding/unwinding strings there was no change, but then it struck me: it's all my own fault and has to do with tension changes directional forces!
Plucking up with my thumb or pick I hear a lot of additional tones like in the uploaded video, but striking down far less so. In addition to that, the pressure on the strings (again, self-inflicted) makes a huge difference on this new guitar - remember it is an all solid with the high tension strings that do ring out substantially.

So: forming the chords with just enough string pressure gives me a well-sounding tone every time, plucking up or down makes no difference. Pressing down hard away from the fret gives significant under- and overtones when played individually, especially when plucking up.

Maybe my experience and explanation makes sense and helps someone (I couldn't sleep, thought my guitar was faulty!),
Cheers,
Eirikur

PS: Striking the entire chord makes the additional tones quite pleasing actually...
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