People making music together need ways to coordinate their actions across a changing performance. Shared patt provide use reference poi while sub gestures commu intended cha that al performers t adjust th timing dur complex musical passages. A written part can indicate the planned notes without specifying every detail of how a group will move together. Performers also listen to one another and respond to small differences as they occur. Coordination is therefore not simply a matter of each person following an isolated instruction. It emerges from preparation combined with continuing attention to the group.

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