The song of Pied-crested Tit-Tyrant has been characterized as a series of loud descending whistles similar to the song of the Southern Beardless Tyrannulet (Camptostoma obsoletum) (Fjeldså and Krabbe 1990). Schulenberg et al. (2007) describe the call as a squeaky, descending tweek-tweek-twik-tuik-trr; this call lasts 1.5-3 seconds (Jaramillo 2003). Pied-crested Tit-Tyrant also sings an early morning song of rising squeaky churrs: teek’teek’trk-trrrk or tk-tweek! trrrrk (Schulenberg et al. 2007). Recordings of Pied-crested Tit-Tyrant vocalizations are archived at Macaulay Library and xeno-canto.