The call of the Blue-capped Tanager is describe as a sharp tsit of a relatively high pitch. Songs are reported to vary by location, but overall a chatty compilation of sharp and squeaky notes (Restall et al. 2007). In Peru, the song is reported to consist of 2-5 syllables of sharp whistles, such as swick-IT, swick-it-CHEW-y, over a timeframe of 2-5 seconds. Intermission between songs is subject to variety. The song of this tanager is similar to the song of the Lacrimose Mountain-Tanager, but can be distinguished by its flow (Hilty 2011). The song of the Blue-capped Tanager can also be compared to that of the Blue-gray Tanager (Restall et al. 2007). Additional audio recordings of vocalizations of the Blue-capped Tanager can be heard at Macaulay Library and at xeno-canto.