“This,” he said, “is called cymatics. The study of the patterns that sounds make when interacting with a physical medium.” As he drew the bow again, the plate made a sound, almost a pure note. It was actually enough to draw a single musicspren, which spun for a moment in the air above him, then vanished. Kabsal finished, then gestured to the plate with a flourish. “So … ?” Shallan asked. “Kholinar,” he said, holding up his book for comparison. Shallan cocked her head. The pattern in the sand looked exactly like Kholinar. He dropped more sand on the plate and then drew the bow across it at
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