One indication of slack key's increasing visibility beyond the Islands is that the first four winners of the Grammy Award for Best Hawaiian Music Album were slack key collections: "Slack Key Guitar, Volume 2" in 2005, "Masters of Hawaiian Slack Key Guitar, Volume 1" in 2006, "Legends of Hawaiian Slack Key Guitar—Live from Maui" and "Treasures of Hawaiian Slack Key Guitar – Live in Concert from Maui."