MIMF

Here video and audio coupled, with captions:

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

YouTube:
https://youtu.be/t9USFNMDs2I

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)

"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...

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

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

Meanwhile: I tested those Thomastik "John Pearse Folk" strings lowering the tuning by 2 semitones: the zip tone has completely gone. And I can hear that the zip tone became consonant to the pitch of the string, i.e. now the situation is: 6th D --> zip D 5th G --> zip G 4th C --> zip C Whic...

Alan Carruth wrote: You can check the zip pitch of wound strings by rubbing your finger lightly along the string. ...

I could hear the zip pitch of 4th-5th-6th strings

6th E --> zip Eb
5th A --> zip Ab
4th D --> zip C#

then?

More news. I changed strings to those Thomastick "John Pearse Folk". I fixed the B A D (isn't it funny?) strings after twisting clockwise several times as to tighten the woundings, and the sound of A and D was not only bad as usual, but more than ever. So I untwisted the strings and twiste...

A couple more choices might be gut or nylgut (also denser materials). They should be slightly thinner or will increase tension to reach pitch. It would be a good idea to lower the saddle if possible. "Aquila" strings are nylgut, I tried them: no change if not transitory, provided to twist...

".... The tall saddle had more output...as well as at the pitch of the 'zip' tone. Since the zip tone is normally dissonant making it stronger would tend to make the sound harsher.....a tall bridge could contribute to coupling between the longitudinal and transverse vibrations of the string......

Doug Shaker wrote: .......perhaps tightening or loosening the truss rod a little would help.

there's no truss rod (no need of it)

Does adding weight to the headstock change anything? no; the only thing that changed something was twisting on itself the wounded strings, ten-twelve twists as to tighten the woundings, and while keeping firmly the string not to let it un-twist, fixing it to the post and tensioning to pitch. This m...

If I measured well, action at 12th fret is .120 and strings are .627 inch off the top at the saddle. Why would this help explain the problerm?

here's the lady:
https://drive.google.com/folderview?id= ... sp=sharing

...Different types of strings can give radically different results. I am firmly convinced that, if for no other reason that the typical repertoire is not classical, a crossover guitar is not meant to be played like a classical. I'm thinking of a hybrid set using say silk&steel E A D and nylon/t...

More news.
after a warm up of the strings the parasite tone comes back thus confirming that it is a string problem.

Last news, and good news. Experiments included to try steel phosphor-bronze strings on the crossover, and nylon strings on an acoustic. Well, phosphor-bronze wound strings sound perfectly on the crossover guitar, while nylon strings generate the well known parasite tone on the western guitar. Then t...

I'm waiting for more details about all the experiments, probably will go there next friday

Update. Experiments were going on at lutihier's lab while we were discussing. - A single steel 4th string was set up to pitch instead of a nylon, aaand....no buzz, no double tone but a clear tone. - A single nylon 4th string was then set up to pitch, but instead to be tied it was fixed by simply thr...

Brad Heinzen wrote:Any chance the is the 'zip tone' problem again? That can be really maddening to diagnose, and it always exhibits that same fretting behaviour (it goes away when you fret right at the fret). It's usually only the fifth, and especially the fourth strings in my experience.

"zip tone"?