[dramatic music] [softer music] (pagano) composers love to write for more than one instrument.hey will write for combinations-- small combinations of instruments, and if there's more than two players, that's called chamber music. the piano trio is a very popular ensemble. in a piano trio, we have a piano, we have a violin, and we have a cello. (narrator) for the chamber musician, an awareness of textural changes and how each part fits into the overall work at any given moment, is critical to a successful performance. (man) the ghost trio has an amazing variety if textures within it. for instance, right at the very beginning, you have an abrupt and almost violent start. the interesting thing is it's completely in unison. the violin, the cello, and the piano are all playing the exact same notes. [playing in unison] so that's one kind of texture. and then immediately after that, you get not only a change in texture but a change in the mood where the cello takes a very beautiful solo all of a sudden and we accompany, and then i answer the cello with a melody on the violin. [trio pl