Tuning for acoustic guitar playing

A steel-string acoustic guitar is descended from the classical guitar but strung with steel strings for a brighter, louder sound. The standard tuning for an acoustic guitar is E-A-D-G-B-E although many players, particularly fingerpickers, use alternate tunings such as "open G" (D-G-D-G-B-D), "open D tuning" (D-A-D-F#-A-D), or "drop D" (D-A-D-G-B-E). The 12-string guitar is a variation on the acoustic guitar. It has an added doubling string for each of the traditional six strings. This guitar was popularized by guitar players like Lead Belly, Pete Seeger, and Leo Kottke. Until the 1960s, the main forms of music played on the flattop steel-string guitar included acoustic blues, country, bluegrass, folk, and some styles of rock. The idea of playing solo steel-string guitar in a concert setting was begun by performers like Davey Graham and John Fahey in the early 1960s, who used country blues fingerpicking techniques to compose original compositions with structures similar to classical music. Robbie Basho added elements of Indian classical music and Leo Kottke made the first solo steel string guitar "hit" record. For more info on acoustic guitars and their players see youtube acoustic guitar playing

Guitar tuner info online

Tuning your guitar to itself is where you tune each string to another string on the guitar. It means that you can tune the guitar without having to use a tuner or pitch tool. More info at Online Guitar Tuning.

Acoustic Guitar Tuners
is a site that takes the terror out of guitar tuning with interesting articles and videos.
Changing your guitar strings goes hand in hand with tuning your guitar. How To Change Electric Guitar Strings has loads of info on when, why and how you should change guitar strings.