original: He was responsible there for music, the organ, directing chants and choir, etc.
simplifications: He was in charge of the music, the organ, directing chants and choir. There he was playing music, the organ, directing chants and choir. He worked with music, the organ, directing chants and choir, etc. He was in charge of the music, the organ, directing chants and choir, etc. He had full control over the music. He was in charge of music there including the organ, choir, etc. He was the music director. His responsibilities were music, the organ, directing chants and choir, etc. He was responsible for music, the organ, directing chants, choir, and more. He has been liable for the music, the organ, the choir, the choir, etc.