In the broad diversity of chamber music genres, the piano trio is particularly full of character, though perhaps sometimes implicitly considered less pure than its cousin the string quartet. The trio is a strange, asymmetrical animal, even lopsided, though not the less graceful, very colorful for its simplicity, with an a priori transparency thanks to the extreme contrasts between the instruments. With all the instruments so plainly audible all the time, their relationships are so much more ambiguous than soloist and accompaniment, the musicians' playing becomes very soloistic by necessity. There never seems to be a leader in a trio, they are individualistic, preferring a kind of mutually controlled anarchy. Each instrument sounds very much at home in its part; a compositional idea is either suited the grouping or it isn't, and when it is, it is unmistakable. The breadth of range — in pitch, timbre, and others — of this little group can be astonishing, while the texture is far from smooth. Excellent musicians can meet one another halfway and make very tight, solid sounds, but naturally there is a certain jazzy friction from the natural gaps in the texture, the gulfs between the characteristic sounds of the three instruments; it is no wonder the trio is so popular for making Jazz. Where the colors of a string quartet can be rich, deep, muted or vivid, the trio is pastel.