Old Yellow Moon is the brand new album from country legends Emmylou Harris and Rodney Crowell. But it's hardly their first collaboration.

It was nearly 40 years ago, in 1974, when Harris first heard the music of Crowell. She was listening to demo tapes and auditioning material, when she heard the first notes of Crowell’s "Bluebird Wine." Harris went on to record that song for her major label debut, Pieces Of The Sky. It was a the beginning of a friendship, and a decades-long musical relationship.

In the years since both singers have recorded to great acclaim. But with Old Yellow Moon, they're in in a reflective mood. On the album Harris says, "we always knew we would do it, but I realized time was passing and I wanted to make sure I did this record." Crowell adds, "Now is the perfect time. We would have made a fine record in 1987 or 1994, but it wouldn't have been this one -- it was worth the wait to me."

Harris and Crowell talk about their long-lasting musical friendship -- and perform a set in The Greene Space. Watch the video, below.

Set List:

• "Here We Are"
• "Dreaming My Dreams"
• "Chase The Feeling"