Posted on

Free Plate Tuning, Part Two: Violins

Free Plate Tuning, Part Two: Violins

by Alan Carruth

Originally published in American Lutherie #29, 1992 and Big Red Book of American Lutherie Volume Three, 2004

See also,
Free Plate Tuning, Part One: Theory by Alan Carruth
Free Plate Tuning, Part Three: Guitars by Alan Carruth



Before I get into plate tuning proper I’d like to digress a bit and discuss the rationale behind the process, and a couple of other things I find it useful to keep in mind while I’m working. And I can’t think of a better way to begin than by telling you about one of my more elaborate experiments.

Fig. 15 gives the relevant information on my fourth and fifth violins. The idea was to check out the influence of asymmetric back graduations by building a pair of closely-matched fiddles with that as the only variable. The one-piece backs were cut from the same plank of bird’s-eye maple and the tops were cut from a red spruce 4×6 that I took out of the wall of my house when I put in a new chimney. The molds were routed using a template. Archings were checked for height at over two dozen points on each plate and were held to .2MM. Graduation, weight, and frequency data is as shown. The delta f mentioned is the frequency drop obtained when a 5G weight was stuck to the plate in an active area of the given mode. Fittings and so on were matched as closely as possible, and the two bridges were cut back to back from the same piece of maple.

Become A Member to Continue Reading This Article

This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page.

If you are already a member, login for access or contact us to setup your account.
Posted on

Free Plate Tuning, Part Three: Guitars

Free Plate Tuning, Part Three: Guitars

by Alan Carruth

Originally published in American Lutherie #30, 1992 and Big Red Book of American Lutherie Volume Three, 2004

See also,
Free Plate Tuning, Part One: Theory by Alan Carruth
Free Plate Tuning, Part Two: Violins by Alan Carruth



The guitar is somewhat simpler acoustically than the violin, and perhaps more limited. As a result it has evolved into a number of more or less specialized forms to suit different musical uses. It is difficult to imagine a guitar that could “do it all” the way a good violin can. Rather, each guitar seems to have a “center,” a sound that is characteristic of it that suits it for a particular style or player. Good guitars do have a wide dynamic and timbral range, but they always retain their characteristic sound.

As I see it, a good part of the art in this game is deciding where you want the “center” to be, or, alternatively, how to get the “center” you want out of a given shape or set of wood. And then you want to have a broad dynamic and expressive range, good balance, and clarity or resolution; the ability to distinguish things like inner lines. No amount of acoustic science is going to tell you what priority to put on the different characteristics of the sound, nor whether you have succeeded in the end. But if you know what you’re doing, an oscillator and a jar of glitter can help you get the sound you want.

One of the main simplifying factors between the guitar and the violin is the lack of a soundpost in the guitar. This allows the top and the back to be more independent; in acoustic terms they are not so tightly coupled and can act out of phase.

Become A Member to Continue Reading This Article

This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page.

If you are already a member, login for access or contact us to setup your account.
Posted on

Searching for Blue Significance

Searching for Blue Significance

by John Calkin

previously published in American Lutherie #56, 1998



I guess I heard about Scott Chinery’s collection of blue guitars at the same time as everyone else. The photo of a necklace of sky-colored archtops lounging on the grass appeared in magazines well outside the field of music. And my reaction was probably the same as everyone else’s — where does this guy get his money? I was glad Chinery had dumped so much bread into the lutherie community, but otherwise I didn’t see the point. So when the staid Smithsonian Institution decided to house the collection for awhile, I was amused and confounded. What was going on here?

I knew two things for sure. First, as a connoisseur of vintage instruments and a collector of wide renown, Scott Chinery was a man to be reckoned with. In the early ’90s he made a short video (available from Stew-Mac) which skimmed off some of the creamier bits of his collection for the home viewer, and let’s just say that any one piece would make any musician’s day turn golden. If the above question about his money seems rude, you should know that Chinery is very up-front about the subject on video and freely talks about what he paid for certain pieces and what sort of tempting offers he has refused for his vintage groovies. My friend and guitar teacher, Mitch Block, played a party at Chinery’s New Jersey home and came back stupefied by the shear quantity of fine (not to mention important) guitars he saw there.

Become A Member to Continue Reading This Article

This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page.

If you are already a member, login for access or contact us to setup your account.
Posted on

In Memoriam: James L. D’Aquisto

In Memoriam: James L. D'Aquisto

November 9, 1935 — April 18, 1995

by Gila Eban

Originally published in American Lutherie #42, 1995 and Big Red Book of American Lutherie Volume Four, 2006

 

James L. D’Aquisto passed away unexpectedly on the night of April 18, 1995.

An unassuming man working mostly alone on Long Island, he has affected many lives and the work of many luthiers in different instrument-making disciplines.

Photo by Tim Olsen

I first visited Jimmy’s workshop in 1978. That visit led to many others as I divided my time between studying with him and making my own classical guitars in Michigan.

Jimmy is at the very core of my guitar making. We made different types of guitars, but the way he understood them so well and the way he understood sound and tone so well could readily apply to any string instrument. I am certain that were it not for him, I would have only the faintest idea of how to evolve my guitars to the fullest extent I am able to.

When I was growing up, my father used to emphasize that there is a huge difference between schooling, in the sense of formal training, and education, meaning wisdom and knowledge. Jimmy, who loved to work and loved to have a good laugh, who brought an abundance of common sense and penetrating insight to all things he saw, did, or said, was one of the most educated men I ever knew. He was a great teacher who has changed me as a person as well as a guitar maker. I am sure he has had that strong and intense influence on other luthiers, however briefly or intermittently they might have known him.

Farewell, dear James. We miss you. You are always in our thoughts. You are always in our hearts. You are always in our work.

Posted on

Review: Archtop Guitar Master Class Series Part 1: Focusing on Bridges and Tailpieces by Bob Benedetto

Review: Archtop Guitar Master Class Series Part 1: Focusing on Bridges and Tailpieces by Bob Benedetto

Reviewed by John Calkin

Originally published in American Lutherie #64, 2000 and Big Red Book of American Lutherie Volume Six, 2013



Video: Archtop Guitar Master Class Series
Part 1: Focusing on Bridges and Tailpieces
Bob Benedetto, 1999

As a hard-core advocate of video learning, I wish I could give this tape the hearty recommendation I gave to Benedetto’s multi-tape series about archtop construction. I’d like to confess that I’m not a builder of archtops, nor do I intend to become one, so it’s likely that I’m not the best judge of advanced information about the subject. It seems to me, however, that there just isn’t $40 worth of information here.

There’s an unwritten rule that a reviewer should never divulge so much that the reader feels justified in not making a purchase, but just for one time I’m going to violate that rule. Here’s the gist of this video: First, the break angle of the strings as they pass over the bridge has nothing to do with the tension of the playing length of the string, nor does the length of the string between the bridge and the tailpiece. Second, the standard Gibson-style adjustable bridge is the appropriate one for the archtop guitar, and any change to its footprint or the adjustment mechanism is bound to have an adverse effect upon the tone and/or volume of the guitar. Third, metal tailpieces by their very nature damage the tone of archtop guitars. Why are these things true? They just are, that’s all. The video isn’t much more specific than that.

Become A Member to Continue Reading This Article

This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page.

If you are already a member, login for access or contact us to setup your account.