Masked Flowerpiercers are described as having high-pitched, thin zeet notes. Lane (in Schulenberg et al 2007) describes the call as a high tsit and ti. Some notes are strident and moderate-pitched when a bird becomes excited (Isler and Isler 1987). Songs are variable based on geographic region and/or subspecies. The song of Masked Flowerpiercer is described as a series of pseat notes that accelerate into 2 to 3 seconds of complex twittering notes (Venezuela; Isler and Isler 1987); as thin notes followed by a twitter (Ecuador; Ridgely and Greenfield 2001); and as a high, lisping, melancholy warble, ending with 2 to 3 drawn-out notes that also drop in pitch (Peru; Isler and Isler 1987, Lane, in Schulenberg et al. 2007). A more generalized rendition of the song can be transcribed as “tzi tzi tzi tzi tzideweedeleeedeeleede” (Fjeldså and Krabbe 1990).