Capriccio from Gradus Ad by Gilbert Biberian played by the Dunlea Garcia Guitar Duo by Luke Dunlea published on 2016-12-18T11:55:35Z Have you heard of this work? Gradus Ad a series of guitar duos comparable to Bartok's Mikrokosmos. 'GRADUS is a cornucopia, full of diverse fruit' as written in the preface. Genre Guitar Duo