Any idea what does "two-bar tangle" mean? It's a paragraph from a fantasy novel: The first thing I heard was the music. A hectic, two-bar tangle, played over and over again. We entered a hall so high and vast it felt like a gym, its gilded corners softened by mossy masses that had to be birds’ nests. A U-shaped table in the center of the room was lined with people. People eating, laughing, whispering to each other, stabbing at their meat. In the center of the room was the source of the awful music: a man in dirty green with a head of dark curls, holding a violin. He sawed at it savagely, in a jerky motion that looked painful.