As a follow-up to our previous work reissuing the recordings of Pau Riba, key figure in Catalonias counter-culture and music scene, Munster presents "Ars Ertica", one of his most sought-after singles, in the 50th anniversary of its original release. It includes alternative edits of two songs included on his classic album Dioptria/1, great examples of his psychedelic folk-rock style at the time that also picture the chilled-out vibe at the studio where Riba was backed by the band Om and some guest friends.