Pibau (gender unknown) (plurale tantum)
According to Sachs, "probably a bagpipe, perhaps also a double-flute"; According to Podnos "questionable"; NB: ➺ homonym (synonym of Pyben).
Sachs, Curt: Real-Lexikon der Musikinstrumente: zugleich ein Polyglossar für das gesamte Instrumentengebiet [Berlin, 1913]. Hildesheim, 1964 [facsimile].
Podnos, Theodor H.: Bagpipes and tunings. Detroit, 1974, p.33 (»Engel, Catalogue; »Cocks (Grove)).