Johnny Cash passed away in 2003, but his music continues to live on. A new album of lost songs, 'Out Among the Stars,' was released earlier this week, and now his son says there are several more albums of previously unheard tunes still in the archives.

“There are a few things that are in the works right now – probably four or five albums if we wanted to release everything," John Carter Cash tells The Guardian. "There may be three or four albums worth of American Recordings stuff, but some of it may never see the light of day.”

The Man in Black released several albums on producer Rick Rubin's American Recordings label before he passed away, including the platinum-selling 'American IV: The Man Comes Around' in 2002. Rubin also released several of Cash's records after his death, including 'Unearthed,' which is a five-disc box set of outtakes and alternate versions of some of his previous American Recordings albums, as well as a disc of gospel songs. And Rubin hints that there are plenty more songs that could still be released as well.

"We released the work we had been planning to release along with John [Carter Cash], and the idea of the 'Unearthed' box set of outtakes was his idea," Rubin adds. "We will probably put out additional 'Unearthed' material recorded since the last 'Unearthed' box, in keeping with John's wishes."

Carter Cash credits his father and mother, June Carter Cash, with having so much material to choose from.

“They never threw anything away,” Carter Cash says. “They kept everything in their lives. They had an archive that had everything in it from the original audio tapes from ‘The Johnny Cash Show’ to random things like a camel saddle, a gift from the prince of Saudi Arabia.”

A video for 'She Used to Love Me a Lot,' from 'Out Among the Stars,' was just released, and the entire record is available for purchase on Amazon.

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