Bass Clarinet and Percussion for Bass Clarinet and Percussion (2 players) by Morten Feldman. Universal Edition, 1981, SB, 10 pages (large format performing score). The percussion parts require one player on cymbals (3 suspended), timpani, xylophone, and vibraphone; and the second player on gongs (3), marimba, xylophone, vibraphone, and timpani. While not technically difficult aside from the frequent meter changes there are some complications in the bass clarinet part that make this a piece for advanced performers as explained by David Cook below. "The bass clarinet part is 'in C' and uses the German notation system; passages written in bass clef are played a M2 (whole step) higher than printed, while passages in treble clef are played a M9 (whole step and an octave) higher than printed. . . . There are even some professional recordings that do not get this right. [I asked him about the marking I associate with harmonics in string writing.] You are correct with regards to the little circles above some pitches in the treble clef. Those notes, normally played at concert pitch with fifth partial fingerings, would instead be played with third-partial fingerings. A more liberal approach would allow anything other than a fifth-partial fingering; I used a few seventh-partial fingerings for pitch and response (subject to differ depending on instruments). I feel anything other than the 'standard' fingering would work." (C2161)