David Anderson

So, it’s cold out side and the snow is falling. You decide to sit by the fire with your favorite hot beverage and your guitar for a little one on one time. You give your prized axe a strum, but it seems someone has replaced your instrument with an imposter. This guitar looks like your old friend in every way, but it’s buzzing and rattling, and the frets are sharp. You ask yourself what is going on.

Humidity is what’s going on, or more accurately, the lack of humidity. Guitars and other stringed instruments require 45 to 55% relative humidity in the environment in order to function properly. If your guitar gets below 45%, it will actually begin to shrink. Your instrument can easily loose 1/8 of an inch of mass from shrinkage due to a dry environment, and that means sharp fret edges, notes that buzz, cracks in the wood, lifting bridges, and even failing neck joints. If your instrument is over-humidified, on the other hand, you will notice an immediate difference in the way it plays due to the neck relief changing and the top rising and bellying up. You may even notice a difference in tone.

But don’t “fret”…it’s not too late! You can reverse the condition of your guitar by simply changing the relative humidity of the environment in which it resides. If you have a hard shell case, you can easily add humidity by purchasing a guitar/case humidifier, but you must be sure to keep the guitar in the case while not in use to allow the case interior to act as the immediate environment for the guitar. If you like to hang your instrument on a wall or display it on a stand, you will need to get a cold mist humidifier for your room (home furnaces with built in humidifiers will not suffice). It’s a good idea to purchase a hydrometer so you can keep track of the relative humidity in your area. Expect it to take a few weeks for your guitar to acclimate to its proper environment. This may seem like a lot of effort, but so is humidifying and repairing a top crack or dressing frets due to dryness, fixes not covered by the manufacturer as warranty work. Prevention is key!

So, if you want to give that special stringed someone the gift that keeps on giving, give the gift of humidity. Your guitar will be happy, and you will too.

Written by: David Anderson

Guitars & Humidity: Taking Care of Your Guitar from MyRareGuitars.com

Joey Leone’s recent article on the importance of set-up was spot on. Years back, I worked as a salesman in a small, independent music store. I’d never worked in music sales before, so unpacking brand new guitars fresh off the UPS truck was a new experience for me. I quickly discovered that they were almost never properly adjusted. It was a roll of the dice at best. The guitars that happened to come in playing well were the first to go out the door in the hands of happy, paying customers. The other instruments would hang on the wall a lot longer, while we repeatedly explained that a professional set-up would make them play and feel much better. So I got to thinking that if I learned the basics, and at least got the guitars and bass guitars into reasonably good adjustment, sales would go up. I started talking to our guitar tech, and asked him to explain to me how it all worked. He was amazingly patient with me while I relentlessly picked his brains, until finally, I began to “get it.” I got pretty good at setting up the instruments, and sales went up substantially—not that the owner of the store was in a hurry to give me a raise for my efforts!

Still, I was glad for what I’d learned. While major repairs and maintenance (including fret work and the neck set on acoustic guitars) were things I was wise enough not to tackle, routine adjustments became, well, routine. The electrics were the easiest to work with, because most of the adjustments were done mechanically, with a screwdriver and an Allen wrench.

I found a quick way to scope out a truss rod adjustment, without needing the expensive machined straight edge our tech used. Using both hands, I’d just press the bass string down in two places on the fingerboard, simultaneously–say at the third and 11th frets–and then pluck the string with a free finger. If the string bottomed out, it meant the rod was too tight, and the neck too flat. Conversely, if I could see much more than the thickness of a playing card’s worth of space between the string and the frets (looking from the side, as you would while playing), it meant the rod was too loose, and the neck had too much forward bow.

After that, I’d start adjusting the saddles—up or down for string height, and on the electrics, forward or back for string length. These two adjustments—height and length—are highly interactive. If your strings are higher, you have to press them down farther to play a note. That means more stretch, higher tension, and raised pitch—resulting in the need for lengthening the string, by moving the saddle away from the nut a bit. Lower strings mean less stretch, and less need for compensation. Different players like different string heights, of course, so there’s no single right way to do this, but at the store, I’d try to find a middle ground that would satisfy most players.

Nut slot adjustments are something untrained players shouldn’t mess with. The tech showed me how to do them, using an X-acto saw blade and 400 grit sandpaper. If the slots aren’t shaped properly, the strings won’t seat and flex properly, causing all sorts of problems. I started out doing nuts on cheap, entry-level guitars that had action bad enough that I could hardly have made them worse. And amazingly enough, I had a pretty good touch, and was able to do them well. Still, I left the top-of-the line instruments to our tech, though I’ve done the nut slots on my own pro guitars, since then. Ironically, most guitar techs don’t take the slots down far enough, in my opinion. That’s because if they go too far, the strings start buzzing, and they have to make you a new nut, or at least do some extra shimming—things they really don’t want to take the time do. I think the open string clearance between the nut and the first fret should be about the same as the clearance obtained between a closed string (that you’ve pressed down at a given fret) and the next fret up (toward the bridge). That way, you don’t get additional stretch at the first fret, sparing you the all-too-common aggravation of a guitar that plays sharp at the first fret. But talk to your guitar tech about it. As the saying goes, don’t try this at home.

Worn frets make guitars play sharp! That’s because as a fret wears down, the string vibrates from the front edge of the fret, rather than from the crown—effectively shortening the string, and thus slightly raising the pitch. Worn frets can also cause string buzz against higher, less worn frets. If you then raise the action to offset this, you create all sorts of tuning and playability problems. So get your frets worked on, when they need it. A guitar tech I know suggested that changing your strings is like buying gasoline for your car—something routine and inexpensive. Getting your frets adjusted and replaced is like buying tires. More expensive and done less often, but it’s something you simply must do, from time to time.

Keeping your guitar in tune requires strings that still have some elasticity. They don’t have to be brand new, but over time, strings become stiff and brittle, long before they break. Stiff, brittle strings play sharp, so once they reach that point, it’s time for a new set.

String gauges can make a difference, too. I like fairly heavy strings on my Strat. I use a 12 to 52 set, with a wound 3rd string—pretty much the same gauges I use on my acoustic flat top. I find them more stable, tuning wise, than lighter strings, and I like the fatter tone I get. But some people have no trouble with the lighter, faster, 9’s, 10’s, or 11’s. It just depends on your touch and style.

The weather affects your guitar! Humidity swells wood, higher temperatures expand everything, colder temps contract everything, and all of these variations affect the tension on your strings. A guitar can be in tune at home, and get wonky in a cold car trunk on the way to a gig. At the gig, you re-tune the still-cold guitar, only to have it shift on you again as it warms up in your hands, requiring you to re-tune again (and again!). Don’t worry. It’ll eventually settle down. Better still, arrive a little early, and let the guitar warm up before you play it.

Finally, let me just touch on the question of scale tempering. Musical scales are built around theoretical mathematical ideals, but real world instruments have built-in compromises. These compromises are called scale tempering. The modern equal-tempered tuning system was a major innovation developed for keyboard instruments during the time of J. S. Bach, and his composition, The Well Tempered Clavier, demonstrated its effectiveness. Prior to that system’s introduction, you could not play in some keys without retuning your keyboard. These days, most guitars are built according to the equal-tempered system, but ironically, acoustic pianos employ a variation called “stretch tuning,” to compensate for the sharp harmonics generated by their stiff, massive, bass strings. The piano sounds more in tune with itself, but it’s a challenge to get guitars and other instruments in tune with the piano. Guitars with compensated nuts, guitars employing the Buzz Feiton nut and tuning system, and guitars with computer-designed curved frets are all examples of recent attempts to improve tuning accuracy and compatibility with keyboards.

There’s no way this short article can address all of the things that affect how in-tune a guitar plays on its own, and with other instruments. But I hope it points you in the right direction.

Gordon Kaswell is an award-winning composer, working musician (playing guitars, keyboards and bass guitar), and freelance writer. He lives in the Pacific Northwest. You can email him at gordon@efn.org

Adventures in Intonation from MyRareGuitars.com

Tuning a Gibson Acoustic Guitar

Everybody deserves to have a guitar that plays well, stays in tune, and is in tune with itself. This is not just the privilege of globetrotting superstars, but everyone who owns a decent instrument.

Before I go any further, let me give you the proviso that I am not a guitar tech, set-up guy, or luthier. I’ve been playing for almost 4 decades and I’ve picked up a lot of valuable information along the way. What I do know is when to go to an experienced guitar technician / luthier to get problems solved. The whole purpose of this column is to inform those of you who were curious about some of these things but were afraid to ask or just plain didn’t know. You experienced guys and gals – Eddie Van Halen and Django Reinhardt: who’s better? Discuss.

New Eastwood Wandre Deluxe Electric Guitar

New Guitars

In preparation for our upcoming cross-Canada tour this summer as a member of The Bachman Cummings Band, I decided to take my 2005 G&L ASAT Deluxe to my friend Brian Mascarin, a very in-demand luthier and guitar technician in Toronto, to have him dress the frets for me. Now you would think that the frets on a $2,500 guitar like a G&L would be set-up to perfection. Not so.

Consider the journey that guitar took to get to me: it was made in California in a very temperate climate, traveled across the continent in a truck, possibly in freezing weather, and arrived in Toronto where it hung in a music store for the better part of two years by its neck! And with the same set of strings!

I detected an annoying buzz under the D string that I couldn’t get rid of so I took it to Brian. He said it is not uncommon for some guitarists to come directly from the music store with a brand new Gibson, Fender, or Paul Reed Smith to his shop where he sets up the instrument to its new owners specs and tweaks any minor flaws that the factory may have overlooked. Keep in mind that with the worldwide explosion in popularity of the guitar, these manufacturers have to pump out literally hundreds (thousands?) of guitars every month. It is not realistic to assume that these instruments are 100% ready to go in every way for every player’s needs.

The need for a set-up by a qualified expert is even more crucial in the case of instruments made offshore: drastically different manufacturing climates, month-long trans-oceanic journeys with varying degrees of temperature and humidity, and high volume factory output are factors that have to be considered. No one can dispute the very high levels of quality and workmanship that goes into guitars made in Asia but keep in mind the changes and the journey your instrument has undergone before it got to you. No wonder it needs a bit of tweaking and TLC!

Guitar Strings on the Wall

Strings

Quite often I hear of guitar owners complain that their newly purchased axe just doesn’t play the same as it did when it was purchased (Hey! It was in tune when I bought it!).

Did you change the strings? Of course you did. You took off the now tarnished and oxidized strings that the factory installed and put on a fresh set of your favourite brand with your favourite gauge – you know the super slinky .008’s with the .056 E string! Or the good guys at the store or e-store threw in a set of strings for you. Now the neck has a bow in it and the strings are an inch off the neck.

Why? Because you changed the geometry of the instrument. Here’s a real nugget for you – a guitar’s playability is affected by the gauge of string you use! A set of strings exerts hundreds of pounds of tension on a guitar’s neck. When you change the gauge or thickness of those strings, the tension on the neck changes. Your guitar was set up with a certain gauge of string at the factory. Unless you replace the strings with exactly the same brand (string characteristics in the same gauge vary from brand to brand owing to different manufacturing techniques and different metals used), your guitar will play differently. The only way to accurately determine the gauge of a string is with a micrometer and not many music stores have one of those under the counter.

What to do? Pick a brand and a gauge of string, get your guitar set-up for that string and stick with that string. When you experiment with different brands or gauges (and you should!), get the guitar setup again for that particular string.

Guitar Neck Truss Rod Diagram

Truss Rods

The truss rod is what is adjusted to add or reduce – relief – or bow in the neck. As I said in the opening, I am not a repair guy and I’m not going to tell you how to adjust your truss rod. I personally don’t think you should because the potential for permanent damage is huge. This is when you should go to an experienced technician.

Tune-o-Matic Guitar Bridge

Intonation

Ever wonder why some chords play in tune and others don’t? That’s intonation – the guitar’s ability to be “in tune” with itself. Without going into a long boring treatise on the tempered tuning system developed in the 16th century or whenever it was, suffice to say that your electric guitar, thanks to Mr.McCarty and the engineers at Gibson in the 50’s, has a bridge with little moveable saddles on it called a “tune-o-matic” bridge.

These little saddles adjust the string “length” relative to the 12th fret, which theoretically is the midpoint of the note. There are many resources on the net to get more details on the theory, but the idea here is to let you know that if you have a decent electronic tuner, a small screwdriver and a bit of patience, you can intonate your guitar so that it plays more in tune with itself.

Here’s how you do it:

1. Plug your guitar into your tuner.
2. Tune the strings to pitch.
3. Pluck the harmonic of the 6th string (pluck the string with your finger directly over the 12th fret without fretting the note).
4. Fret the note at the 12th fret and compare it to the plucked harmonic.
5. If the fretted note is sharp, move the saddle back (or to your right looking down on the guitar). If it is flat, do the opposite. Make small adjustments until the pitch of the harmonic and the fretted note is the same. Do this for all 6 strings.
6. If you’re confused, go see your friendly neighbourhood guitar technician or luthier. A set-up with new strings, truss rod adjustment and intonation costs around $20 – $50 but it is well worth it.

Resources

Please visit David’s Website and don’t miss the Bachman Cummings tour this summer!

Here are the names of three very qualified technicians / luthiers in the Greater Toronto Area:

• Musicality, Brian Mascarin (416) 787-1531 Toronto
• The Peghead, Mike Spicer (905) 972-9400 Hamilton
• The Guitar Shop, John Bride (905) 274-5555 Mississauga

Guitar Tuning & Set-Up Tips of the Stars! from MyRareGuitars.com