In each course twin strings are placed so the guitarist can play them together. In each bass course the two strings are generally tuned an octave apart, where as in treble courses they are tuned in unison. However, the sound of the second string in the third course-G differs, as some guitarists play a unison string while others may prefer a high toned bell like sound produced by the octave string in this manner.

Some Variations

Some of the double strings are even removed by a class of guitarists who either like a unique tone or so it can be played easier. This means that when the higher octave is removed from the three bass courses, it will simplify playing bass lines, yet keeps the treble strings at full strums.

12-String Guitar Warping

The twelve strings placed in the guitar create a lot of stress on the instrument often making it warp in a few years so some guitars use a traditional structure as a support to enhance its life span at a cost of its look and tone.

Your Preferred Sound

Guitarists who prefer a near-orchestral sound will go with an open tuning. While those who prefer a complex plucked-string sound can set their 12-string to standard tuning, giving the guitarist the option to tuning the top one and the two low strings to whole tone intervals.

Using Both a 6-String and 12-String

Many players keep the usual six strings guitar as a primary instrument and use these 12 string guitars only for certain songs which demand a brighter sound. This is due to it being very tricky to pluck the individual strings of a 12-guitar and thus making practically impossible tunefully bend notes. This has limited its use as a lead musical instrument. Hard rock and progressive rock musicians keep double-necked guitars having both a 6-string and 12-string guitar neck and components enabling them to do quick switches.

A Bump in Skill Level

A much greater skill is required to use these 12-string guitars as the gap between the two strings is much narrower than the usual 6-strings. This makes it exceptionally difficult to pluck the strings from within a course at any decent speed. Though with enough practice it is certainly a playable guitar and worth the extra effort.

Generally, reverb and distortion effects are used for modifying the signals. The electric guitars have had a tremendous impact, more any other instrument, on the music world right from evolution of music in the 12th century. Right from its beginning in 1931 the electric guitar has become an indispensable part for nearly every musician from jazz to rock who is looking to amplify or tweak their sound.

The electric guitar has marked itself as the stringed musical instrument having the capacity to magnify a multitude of sounds and styles. Whole new genres of music such as rock and roll have evolved because of these instruments.

Luthiers, guitar makers, electronics enthusiasts and instrument manufacturers were the first to design electric guitars. Earlier on, hollow bodied acoustic and tungsten pick-ups were used in the initial models of electric guitar. After that, George Beauchamp developed an electrically amplified guitar in the year 1931. Following this, commercial production of electric guitars started in 1932. Gage Brewer was the first celebrity to perform with an electrically amplified guitar.

The shape of the guitar body, though similar, has many variations in terms of materials. Also considering the sonic qualities of the guitar, the wood with which the body is made is very carefully chosen. Alder, Swamp ash, mahogany, poplar and basswood are used for most guitars; Maple is used in only some guitars as these are very heavy in weight. In rare cases, cardboard and plastic have also been used for making guitars to give an overall effect to the sound quality.

Acoustic guitars always depend on the vibrations of the body and the air within it to generate music. This is why most acoustic guitars have a familiar hollow body. Electric guitars on the other hand are dependent on magnetically induced electric signals, which are generated by the vibrations of metal strings at the sensitive pickups. This gives guitar designs more freedom in the shape and construction of these guitars.

There are 11 types of guitar bodies. They are; solid body, string- through body, Semi acoustic, electric acoustic, string- bridge- neck variants, seven- string, eight-nine-string, ten string, twelve string, 3rd bridge and double neck guitar.