Duettino by Bertold Hummel

In the Meditation a passacaglia is built on the base of twelve different clusters in the piano; the series begins in the third bar after a short introduction, is completely repeated three times, and counterpointed by the ever transforming vibraphone melody. Framing the movement the introduction is repeated at the end.

The character of the second movement Ostinato  is moulded by an ascending four-note motive contrasted by a damper-pedalled eight-tone sequence developing into a short melody. Through numerous interactions of this musical idea the composer unfolds an amusing Rondo which also integrates Jazz rhythms.