Bernhard Lang Piano Music Wolfram Oettl, piano Kairos Music CD   Bernhard Lang (b. 1957) writes in a number of different media, from chamber music to theatre works. His solo piano music is reflective of the composer’s omnivorous interest in various musical styles and his adroit sense of scoring, which allows the piano to have an orchestral impact in the two multi-movement works on his latest Kairos CD.    In liner notes for the CD, Lang remarks that he is interested in free improvisation and DJ electronica as well as contemporary concert music. One can hear this in the angular