Spiedze (f)
tube through which the bag of a mouth-blown bagpipe, &c. is inflated
Definition in Rudens explanatory dictionary: "Detaļa (piemēram, flautai, stabulei) gaisa strāvas virzīšanai uz (tās) iekšējo virsmu" [Part (e.g. of a flute, pipe) to lead air to the interior]; Seemingly misinterpreted by Allmo as the term for drone-pipe ([one or more] "spiedzes", skalmejor [shawms] and a "ragastene", melodipipa [chanter]).
Muktupāvels, Valdis: Latviešu mūzikas instrumentu sistemātika [Thesis]. Rīga, 1999, p.110 (& 143 [index]).