“Lydian” takes its name from an ancient Anatolian script, a writing system descended from Phoenician forms and related to early Greek alphabets, yet marked by its own distinct turns. In this live classical set at National Sawdust, Eamon Goodman treats that history less as a theme than as a method, letting fragments, repeats, and small deviations accumulate meaning over time. If it has an NYC premiere, it reads as an apt one: a piece about how cultures transmit, mutate, and leave traces. The result is more archaeological than decorative.