One System, Not a Bag of Parts

You now know what the parts are. The last idea is that they are not independent, and a guitar that plays badly is usually not a guitar with one broken part — it is a guitar whose parts have drifted out of agreement.

Think about what happens when you change to heavier strings. Heavier strings at the same pitch means more tension. More tension pulls the neck into more forward bow, so the action rises and the guitar gets harder to play. More tension also pulls harder on the bridge. And thicker strings need their saddles moved back a little further, so the intonation is now slightly off. One decision, four consequences.

That chain is what a setup fixes, and it is done in a fixed order for a reason: each step depends on the last. First the truss rod, to set neck relief. Then the action at the bridge saddles. Then the intonation, which can only be set correctly once the height is right. A good setup makes more difference to how a guitar feels than almost anything you can buy for it.

A short diagnostic list, now that the words mean something. Buzzing on open strings but not fretted ones usually means the nut slots are cut too low. Buzzing everywhere means the action is low or the neck is too flat. Notes that are in tune at the open string but sharp at the twelfth fret mean the intonation needs setting. Crackling that changes when you wiggle the cable means the output jack. A guitar that will not stay in tune is usually strings badly wound at the post or binding in the nut slots — very rarely the tuners themselves.

And the most common problem of all is simply old strings. They corrode, they collect skin oil and grime in their windings, the added mass makes them go false and dull, and they lose their ability to be intonated. Most guitars that sound dead sound dead for this reason alone.

Finish by playing. Strum an open E chord and pay attention to the whole path you have just learned: your pick sets the strings moving, the nut and frets set the pitch, the saddle carries it to the top or the pickup converts it to voltage, and the body or the amplifier turns it into something the room can hear.

E

Open E major — the chord that uses all six strings, so every part of the instrument is involved.

An acoustic blues in E to finish on. Strum along, and listen to your guitar as a machine you now understand.

Where to go from here: if you have not played much yet, Rock Guitar From Scratch or The 12-Bar Blues, Start to Finish will get your hands moving. If you want to understand what the notes are doing rather than what the wood is doing, try Music Theory for Guitarists. And whatever you do next, change your strings first.