The song of Orange-breasted Bunting often is described as a warble, sad and sweet (Howell and Webb 1995) or tinkling (Edwards et al. 1972). This is probably because its phrases are divided in fairly even spaces, are in a narrow frequency range, and have alternating high and low sounds are distinguishable. These alternations also give the song a disjunct quality (Thompson 1968). Among the Passerina buntings, the song of Orange-breasted Bunting is the slowest, and is most similar to that of Painted Bunting (Passerina ciris). The songs of both have a warbling quality (with intervals longer than 2 centiseconds), but the latter is faster, averaging 6.46 figures per s, compared to 3.64. Neither bird regularly repeats figures in a single song (Thompson 1968).
Other members of the genus, such Varied Bunting (Passerina versicolor), Indigo Bunting (Passerina cyanea), and, particularly, Lazuli Bunting (Passerina amoena), have faster songs (less than 1 centisecond intervals) that frequently repeat figures more than once in a song (Thompson 1968).
Thompson (1968) also noted variation between the songs given by an individual male.
The call of Orange-breasted Bunting’s hard chlik or tchik (Howell and Webb 1995), similar to that of other Passerina buntings, such as that in the following recording:
For a representative audio recording with sonogram, see audio