Português: Tocar Acordes de Guitarra, Español: tocar acordes de guitarra, Deutsch: Akkorde auf der Gitarre spielen, Italiano: Suonare gli Accordi con la Chitarra, Français: jouer des accords à la guitare, Русский: играть аккорды на гитаре, 中文: 弹吉他和弦, Nederlands: Gitaarakkoorden spelen, हिन्दी: गिटार बजाएँ, Tiếng Việt: Chơi Hợp âm Ghita, ไทย: จับคอร์ดกีตาร์, 日本語: ギターでコードを弾く, العربية: عزف كوردات الجيتار
Open tuning refers to a guitar tuned so that strumming the open strings produces a chord, typically a major chord. The base chord consists of at least 3 notes and may include all the strings or a subset. The tuning is named for the open chord, Open D, open G, and open A are popular tunings. All similar chords in the chromatic scale can then be played by barring a single fret. Open tunings are common in blues and folk music, and they are used in the playing of slide and bottleneck guitars. Many musicians use open tunings when playing slide guitar.
Guitars have been played since the Renaissance era, after descending from the ancient Greek instrument, the kithara. Or, at least, that's how the theory goes: the only real proof for this is the similarities between the Greek word and the Spanish word, quitarra. Early guitars often had four strings, evolving into the six-string version we know today in the late 1600s. Anton Stradivari, the famous violin-maker, also had a hand in making guitars. There's now only one Stradivarius guitar left in existence.