Costa Rica, musically, has always been a mystery to me.  The last contact I had was with a brilliant DJ out of San José who hosted a progressive rock radio program, but to find out that there is experimental music coming out of the country is a very pleasant surprise. Cyanosis is not a stranger to this site, as Efrain Valerio’s work was reviewed when he participated in a split album with our friends Destruktionsanstalt in April.  This is the first chance I have had to hear his own work, and it is as bleak a recording as I have…