Several releases on Tuesday (March 14) are collaborations and compilations covering a broad spectrum of country music. The soundtrack to the 1975 songwriter documentary, Heartworn Highways, includes the first recordings made by Rodney Crowell, Steve Earle and John Hiatt. The Hacktone/Shout! Factory release also features previously unreleased acoustic performances from Guy Clark, David Allan Coe, Townes Van Zandt and Steve Young. ... Bryan Sutton teams up with Tony Rice, Doc Watson, Earl Scruggs, David Grier and Norman Blake for Not Too Far From the Tree (Sugar Hill), an album of guitar duets. ... Voice of the Spirit, The Gospel of the South (Dualtone) offers spiritual songs from Johnny Cash, Vince Gill, Earl and Randy Scruggs, Connie Smith, Mavis Staples and Marty Stuart, among many others.