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 Sackpfeiff from Musica Getutscht: a treatise on musical instruments (1511) by Sebastian Virdung. Virdung's was the first, later copied very much by Agricola |  Sackpfeiff from Martin Agricola's Musica Instrumentalis Deudsch: a treatise on musical instruments, 1529 and 1545. Agricola's book pretty much copies the books of Virdung but clears some things up and puts the bagpipes with the woodwind section instead of the brass. |