Análisis de los experimentos

Body Style:

Acoustic guitars come in a variety of sizes and shapes, from small travel size, to jumbo, to

dreadnought. The body style in an acoustic guitar determines sound projection and tonal emphasis. Things to consider are tonal quality vs. playing comfort. Some acoustic guitar bodies come in a single cutaway design which gives access to the higher frets.

Tonewood:

The choice of wood determines the sound of an acoustic guitar. Different types of wood produce different tones, but most guitar makers believe that the top is the most important for determining tonal quality. Spruce is the standard material for tops with Sitka spruce being the most common.

Wood Selection: Recommended Guitar Brands & Models Price Range

All solid wood (Top, Back & Sides) Yamaha LL16, Timothy, Taylor, Takamine $1200 and above Solid Top & Back, Sides Laminated Takamine (made in Japan model) $1600 - $2200 Solid Top, Back & Sides Laminated Yamaha LL6, Ayers (Dreadnought) $500 - $900

All Laminated Not recommended As cheap as $60

Combination Types: Sounding in general

Spruce Top/Rosewood Back & Sides all rounded Spruce Top/Mahogany Back & Sides brighter & woody sounding

Cedar Top/Mahogany Back & Sides mellower

Electronics:

Some acoustic guitars come with pickups and preamps built in for playing in larger venues where your acoustic sound needs to fill the room. Some instruments have preamps mounted in a hole cut in the side of the instrument, while others mount inside the sound hole. There are systems that combine preamp, microphone, piezo pickups , EQ, and tuners.

Neck Profile and Angle:

The size of your hand is key factor to decide which neck profile is suitable for you. Some profile is fatter (such as Takamine), some are thinner (such as Taylor). Choose one that you are comfortable with.

Most guitars are constructed in a controlled environment of 40 – 60% humidity level and are mostly not local made. They are made in US, Europe, Japan, China, Taiwan, South Korea, etc, depending on the brands and models. Humidity level in Singapore (around 70 - 95%) is much higher compare to those countries, which may cause the guitar to deform when they are exposed to the climate here. When buying a guitar, do look out for signs of deformed neck and swollen body.

Intonation:

Intonation determines whether or not the notes play in tune as you move up the neck. If the distance between the frets (usually above the 12th fret) is off, the guitar will be incapable of playing in tune and therefore useless as a recording or performance instrument.

One simple way to check for intonation problem is to hit the harmonics at the 12th _{fret. If the} harmonics give you the correct pitch, then the guitar’s intonation should be fine.

Guitar Action

Refer to the height of the strings above the guitar fretboard. Action too high makes it harder to press the chord/note. Action too low may cause a buzzing sound.

Ideal action height at 12th _{fret: low E = 0.25cm, high E = 0.20cm}

Ask the guitar shop to do the set-up for you when buying the guitar, if the guitar action is too high/low. Fret = 12, Harmonics = EADGBE

Truss Rod

In the neck of a guitar there is a metallic rod called the 'truss rod'. This allows the curvature of the guitar neck to be adjusted, which is necessary when changing the string gauge, or when drastic temperature and/or humidity changes occur.

When buying a guitar, try look for one which got truss rod build in. It will definitely be useful for guitar maintenance and playability (action) adjustment.

Picture below shows the cross section of a truss rod and the adjustment guide:

Tuning Machines:

The type of tuning machine your guitar has is very important. This is what allows you to fine tune and hold pitch. Enclosed machine heads resist rust and airborne corrosives, and therefore don't require as much maintenance or replacement as open tuning machines.

Bridge and Fingerboard:

The materials used for bridge and fingerboard do have an effect on sound, but this is minimal compared to the body of the guitar.

Finish:

Different types of finish can affect the way the wood vibrates, but there is nothing you can do about this. These decisions are made by the guitar maker and they usually choose wisely.

Appendix - 2

I Worship You Almighty God

(Sequence Type: 1 – 6m – 4 – 5) G Em

I worship You, Almighty God C D

There is none like You G Em

I worship You, O Prince of peace C D

That is what I long to do C G

I give You praise

Em Am D For You are my righteousness G Em

I worship You, Almighty God C D G There is none like You

How Great is Our God

(Sequence Type: 1 – 6m – 4 – 5) G Em

The splendor of a King, clothed in majesty C2

Let all the earth rejoice, all the earth rejoice G Em

He wraps himself in Light, and darkness tries to hide C2

And trembles at His voice Trembles at His voice G D/F#

How great is our God, sing with me Em D/F#

How great is our God, and all will see C2 D G How great, how great is our God G Em

Age to age He stands, and time is in His hands C2

Beginning and the end, beginning and the end G Em

The Godhead Three in One, Father Spirit Son C2

The Lion and the Lamb, the Lion and the Lamb G D/F# Em D/F# Name above all names, worthy of all praise C2 D G My heart will sing, How great is our God