The Carter Family

They were the first vocal group to become country music stars, and were among the first groups to record commercially produced country music. Their first recordings were made in Bristol, Tennessee, for the Victor Talking Machine Company under producer Ralph Peer on August 1, 1927. This was the day before country singer Jimmie Rodgers made his initial recordings for Victor under Peer.
The original group consisted of Sara Carter, her husband A. P. Carter, and her sister-in-law Maybelle Carter. Maybelle was Sara's first cousin, and was married to A. P.'s brother Ezra Carter (Eck). All three were born and raised in southwest Virginia. They were immersed in the tight harmonies of mountain gospel music and shape note singing. The latter dated to the early 19th century and revivals in the South.
Throughout the group's career, Sara Carter sang lead vocals and played rhythm guitar or autoharp. Maybelle sang harmony and played lead guitar. On some songs A. P. did not perform at all; on some songs he sang harmony and background vocals, and occasionally he sang lead. Maybelle's distinctive guitar-playing style became a hallmark of the group. Her Carter Scratch (a method for playing both lead and rhythm on the guitar) has become one of the most copied styles of guitar playing.
The success of the Carter Family's recordings of songs such as "Can the Circle Be Unbroken", "Wildwood Flower", and "Keep on the Sunny Side" made these songs country standards that were later inducted into the Grammy Hall of Fame. The Carter Family was inducted in 2005 after having been the first group inducted into the Country Music Hall of Fame in 1970. The group (in all its incarnations) recorded for a number of labels, including RCA Victor (and subsidiary label, Bluebird), ARC group, Columbia, Okeh and various imprint labels.