It has taken experts at the University of Wales in Bangor five years to transcribe and edit the collection.

BBC: NEWS | UK | Wales | North East Wales | Music heard again after 400 years

Julia Jones of the University of Wales, Bangor, and her colleagues may soon have the answer to that question.

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The Centre for Advanced Welsh and Celtic Studies (CAWCS) will work in collaboration with Oxford University, King's College London, Bangor University and the National Library of Wales on the "archaeological background of the emergence of the Celtic languages in western Europe".

BBC: Celtic heritage: Project wins funding to explore origins