Vocalizations of the Brassy-breasted Tanager are similar to the closely related Gilt-edged Tanager Tangara cyanoventris (Isler and Isler 1987). The call notes of the Brassy-breasted Tanager are described by Isler and Isler (1987) as a high-pitched, drawn-out tseee or high-pitched, short tsit. The sharp tsit may be repeated rapidly in song, as TSEEeh, tsi, tsi, tsirrr, tseep (Sick 1993). Calls of the Brassy-breasted Tanager also are described as a very high-pitched feefee-wi, and the song as an extremely high pitched iiiiiiiii (van Perlo 2009). The Brassy-breasted Tanager produces a moderately-pitched, rough-sounding chittering noise while present in groups (Isler and Isler 1987).