Note 977 — Chapter VIII · THEATRE (continued).
Reading edition
When making their exit, it is said they were preceded by a flute-player. Sch. Aristoph. Vesp. 582. These musicians wore, while playing, straps of leather called φορβείαι, bound over their mouth in order to regulate the quantity of air transmitted into the pipe. Id. ibid. See Burney, Hist. of Music, i. 279.