#211
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Whilst the top wood may be Sitka or Engelmann, an oft quoted phrase is "spruce is spruce" meaning that the mechanical and acoustical properties of the spruces overlap so much that very similar properties can be found in either species, so a species tag tells you very little about acoustical performance. Unless the species are sorted by particular values of their measured properties, they are essentially all from the same population. It is worth considering how large a difference in resonant frequency needs to be to make a "significant difference" in performance for a truly responsive guitar. To minimise over-coupling problems (and hence possible intonation problems) resonances need to be placed as far as possible from scale tones. At main air resonance frequencies a semitone interval is ~6 Hz. To get within 1 Hz of target frequency demands quite a bit of accuracy. Checking against your chart, no more than a dozen of the 32 would pass that test for that particular resonance. For most of the 32 to pass that test, the standard deviation in first resonant frequency would need to be better than ~0.3%. The proof of this pudding is inevitably in the hearing, and whether people like the sound of V bracing or not, I doubt that the intonation will be any different from previous offerings. |
#212
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http://semimac.org/wp-content/upload...ic-Guitars.pdf So yes there does appear to be a certain amount of variation in the production techniques used in 2007 with X bracing. And with the amount of testing done at that time including the Helmholtz test accuracy problems noted by French Brubaker "this data does not satisfy the requirements of the isoplot method; the test variation is not small compared to the part variation. Thus, trends suggested by the Helmholtz frequency data should be evaluated carefully (perhaps with more testing)before being accepted as being real. Just sayin' And yes we do agree the pudding is trying it for one's self
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Enjoy the Journey.... Kev... KevWind at Soundcloud KevWind at YouYube https://www.youtube.com/playlist?lis...EZxkPKyieOTgRD System : Studio system Avid Carbon interface , PT Ultimate 2023.12 -Mid 2020 iMac 27" 3.8GHz 8-core i7 10th Gen ,, Ventura 13.2.1 Mobile MBP M1 Pro , PT Ultimate 2023.12 Ventura 12.2.1 |
#213
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Maybe all that dissonance is what makes a non V braced guitar wonderful....
I stopped chasing my tail for perfect pitch years ago. I hear more difference when I change a good setup stock nut with an earvana and can accept it' as the best I want it to get and spend more time plying and getting better. I wish Taylor luck either way. Bad enough Gibson is so mismanaged. Maybe fender will finally get a consistently good acoustic lone going. |
#214
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rct *I love them. Dearly. I wouldn't live without at least...three or maybe 5 or so of them. 7 I guess. |
#215
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Hard to believe this thread hasn't been bumped in over 5 hours.
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#216
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As you wish. Ive got the seasoning this thread needs. Mesa Boogie has a designer named Andy Fields on it's design team. It must be a good time in history to be named Andy. Andy and Andy could get together and design V-Class Braising for speaker cabinets and then design cascading pre-amps for the 9000 series Taylors.
(Scroll down) http://www.mesaboogie.com/about/the-design-team.html |
#217
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D being the top note G# = 415hz D= 587hz 587-415 = 172, a slightly flat F. G# being the top note D= 587hz G# = 831hz 831-587 = 244hz, slightly flat B. Maybe that is what's happening? Interesting stuff... As a side note, B and F are the fifths of E7 and Bb7 chords , whose guide tones (thirds and sevenths) are g#/ab and d. Maybe another element that could explain why the fifth is often let down in voicings?
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Thomas Féjoz 7-strings MD - Jura spruce / Madagascar Eastman E20-D |
#218
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Were does the sub tonic fit in? This is getting way over my understanding of theory. I think maybe what you posted about the 5th has something to do with cadence. Traditional Cadence is 1 - 4 -5. I couldn't find what type of Cadence 5 -1 - (4) is and was wondering about the type of scale. (Type of)
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#219
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When the frequencies are further apart, there will still be a beat at the difference frequency, but this frequency will be much higher. Maybe it depends on the person if this rapid volume beat is perceived by the brains as a 'new tone'. In my brains this does not happen. Whatever the answer, the beat is not a subharmonic according to the formal definition, although its modulation frequency is lower than any of the two tones that cause it.
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#220
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Or it is being way over thought. |
#221
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Fascinating thread
has anyone noted this treatise on soundboards ? INCORPORATING ACOUSTICAL CONSISTENCY IN THE DESIGN FOR MANUFACTURING OF WOODEN GUITARS Patrick Dumond A thesis submitted to the Faculty of Graduate and Postdoctoral Studies in partial fulfillment of the requirements for the DOCTORATE IN PHILOSPHY degree in Mechanical Engineering Ottawa-Carleton Institute for Mech anical and Aerospace Engineering Faculty of Engineering University of Ottawa © Patrick Dumond, Ottawa, Canada, 2015
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Been doin this, way too long..... |