Jarboe is a classically trained singer who was "untrained" by Michael Gira of Swans to develop a more experimental vocal style. She has perfect intonation and control throughout her upper register, producing a bright yet heavy tone. Her breath control allows for long sustained notes. Trained as an alto, her voice takes on a heavy resonance in the upper third octave. While capable of low notes, she typically sings from E3 to D4 or higher. Her unconventional performances combine shouting, screaming, and whispering with a conscious understanding of her vocal abilities and southern drawl.