Oliver Peter Graber is playing his own compositions, additionally a very few pieces by Franz Liszt, Claude Debussy, Ludwig van Beethoven, Sergej Rachmaninoff, Maurice Ravel, Peter I. Tchaikovsky, Serge I. Tanejew and J.S.Bach.

His own compositions include ORIGINAL WORKS (compositions for piano solo and concertos for piano and orchestra) as well as PIANO TRANSCRIPTIONS (based upon music by J.S.Bach, F.Chopin, W.A.Mozart, S.Rachmaninoff, D.Shostakowitsch and P.I.Tschaikowsky).

Additionally Oliver Peter Graber is an expert in the field of electronic music and plays a lot of different synthesizers and samplers. He published an online-dictionary of professional electronic instruments and is mixing and mastering his own compositions himself. On recordings of his own music he is sometimes also playing the Violin.

He is used to conduct his own compositions and arrangements as well as some original pieces by composers like Alexander Glasunow during live-performances and for recordings.

Together with Roberta Pili and Daria Kovaleva he formed a Piano-Duo and the Piano-Ensemble "KLANGREICH" (Two Pianos and Piano 4 as well as Piano 6 hands) and he also performed different chamber music (including accompanying of singers and dancers).