A warning to potential buyers: The music on this disc is aleady contained in the Four-disc set of the Sonatas (CDA67221/4)by Hamelin. If you only want the "Forgotten Melodies", this is an excellent disc to purchase, but you might as well get the set that includes all the sonatas as well. This is wonderful music, wonderfully played. There is a well-priced 7CD set of Medtner's complete sonatas and selected other works on Brilliant Classics, played by Hamish Milne. His set has the Op 39 set of "Vergessene Weisen" but not Op 38 as on Hamelin's set.
I am not going to get into a whole discussion about the technical ease with which Hamelin plays - some reviewers read this as a flaw of his playing, somehow missing a sense of heroic struggle associated with pianists of lesser technique. My humble view is that it is our gain that we can hear these works played with such command and ease. If you do not know Medtner's music, this disc is a good introduction, as the works are short, almost like sets of Preludes or Etudes by Rachmaninov or Scriabin.