The first time I heard Rodrigo y Gabriela, the pair was covering Metallica's "Orion." It's a beautiful composition, but what I couldn't wrap my head around was that this dense, majestic instrumental was being played by only two acoustic guitars. Rod and Gab are known for their incredible live shows. Having busked and played throughout Ireland for almost a decade before becoming international sensations, the singers have continuously played the world over. The duo's latest album is 'Mettavolution'. "Metta" is the Sanskrit word for compassion. Today, we'll talk about how the members convey that message through their music, and why they chose to cover a legendary Pink Floyd song, one that happens to be 18 minutes long.