Alison Krauss

Bluegrass music is a form of American roots music, and a sub-genre of country music. Bluegrass was inspired by the music of Appalachia. It has mixed... roots in Scottish, Irish and English traditional music, and also it was influenced by the music of African-Americans through incorporation of jazz elements. Immigrants from England, Wales, Ireland, and Scotland arrived in Appalachia in the 18th century, and brought with them the musical traditions of these countries. These traditions consisted primarily of English and Scottish ballads— which were essentially unaccompanied narratives— and dance music, such as Irish reels, which were accompanied by a fiddle. Many older Bluegrass songs come directly from the British Isles. Several Appalachian Bluegrass ballads, such as Pretty Saro, Barbara Allen, Cuckoo Bird and House Carpenter, come from England and preserve the English ballad tradition both melodically and lyrically. Others such as The Twa Sisters also come from England, however the lyrics are about Ireland. Some Bluegrass fiddle songs popular in Appalachia, such as "Leather Britches", and Pretty Polly, have Scottish roots.
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Folk music includes both traditional music and the genre that evolved from it during the 20th century folk revival. The term originated in the 19th... century but is often applied to music that is older than that. Certain types of folk music are also called world music. Traditional folk music has been defined in several ways: as music transmitted by mouth, as music of the lower classes, and as music with unknown composers. It has been contrasted with commercial and classical styles. One meaning often given is that of old songs, with no known composers; another is music that has been transmitted and evolved by a process of oral transmission or performed by custom over a long period of time. Starting in the mid-20th century a new form of popular folk music evolved from traditional folk music. This process and period is called the folk revival and reached a zenith in the 1960s. The most common name for this new form of music is also "folk music", but is often called "contemporary folk music" or "folk revival music" to make the distinction. This type of folk music also includes fusion genres such as folk rock, folk metal, electric folk, and others.
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