At Stower's recommendation, I have joined this forum in hopes that I could be of assistance on the subject of Medieval music of China (which would mainly comprise music of the Sui/Tang (6th-10th centuries) and Song-Yuan (10th-14th centuries), of which many scores and accompanying documentation in textual and iconographic form survive. Please let me know what specific information you'd be interested in.
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David Badagnani
Kent, Ohio
USA