Music is sound AND silence. It is the spaces BETWEEN the notes that create rhythm, melody, and meaning, and the greater the composer -- and the perfornance -- the better the quality of the silence. Legendary pianist Artur Schnabel said that it wasn't the notes but the silences between them he played better than other people. A few seconds more or less at crucial moments in the performance of a piece may mean the difference between a mundane and a transcendent experience.
As a witness for Peace, our role was to witness in two senses of the word: we SAW, and by our presence we offered affirmation by word or example of a solidarity based on love and faith and the Good News. The word that is much used is "accompaniment." Our contribution was less in our doing than our being-with.