Campaigning resulted in the Hawaiian category's establishment in 2005. Prior to its creation, Hawaiian music recordings were eligible for the Best World Music Album category but no Hawaiian musician or group had ever won a Grammy Award. During its seven-year history, awards were presented to Charles M. Brotman for "Slack Key Guitar: Volume 2", producers Daniel Ho, Paul Konwiser and Wayne Wong for "Masters of Hawaiian Slack Key Guitar: Volume One", the same production team plus George Kahumoku, Jr. for "Legends of Hawaiian Slack Key Guitar: Live from Maui" in 2007 followed by "Treasures of Hawaiian Slack Key Guitar" in 2008, and "Masters of Hawaiian Slack Key Guitar: Volume 2" in 2010, Tia Carrere and Ho for "Ikena", and Carrere for "Huana Ke Aloha" in 2011. Eligible recordings had to feature the Hawaiian language on "more than half of its vocal tracks", though instrumental albums were also acceptable. Awards were presented to the engineers, mixers, and/or producers in addition to the performing artists.