Dudati (verb)
According to Kuhač, this term is also used in Czechia, but I haven't encountered it (yet) as such in other sources.
Kuhač, Franjo Š. [Šaver]: Prilog za poviest glasbe južnoslovjenske: Gajde [Contribution to the history of South Slavic music: Bagpipes]. In: Rad jugoslavenske akademije znanosti i umjetnosti, knjiga L (Zagreb, 1879), p.56 [footnote (continuation of p.55¹)], 68 [2x (!)], 91 (leise blasen [to blow softly]).