ICMC BOSTON 2025

Online Listening Room

Curiosity, Play, Innovation - A 50th Anniversary Celebration of Creativity in Music, Science, and Technology

June 8-14, 2025

ICMC BOSTON 2025: Online Listening Room #5

ID#: 193

Nine Dantean Circles (2023) ; 11:26

by Anselmo Guerra

University of Maryland Federal University of Goiás, Brazil

Nine Dantean Circles is an electroacoustic composition inspired by Dante Alighieri’s Divine Comedy, particularly the vivid imagery and emotional depth of the nine circles of Hell. This work explores the allegorical descent into sin and human experience through meticulously crafted soundscapes, employing advanced sound synthesis, manipulation, and spatialization techniques. The composition’s primary sonic materials include recordings of monastery bells, prayer soundscapes, and lamentations, symbolizing the spiritual struggle and torment depicted in Dante’s epic. These elements are transformed through granular synthesis, time-stretching, feedback loops, and delay effects, creating evolving textures that mirror the increasing complexity of each circle. Spatialization is a key aspect of the piece, achieved through High-Order Ambisonics (HOA) and octophonic projection. This allows the listener to experience dynamic circular movements and a sense of immersion that parallels Dante’s journey. Based on Lissajous figures, algorithmic movements add further layers of control and finesse, culminating in ultra-precise, decelerated circular motions that reflect the thematic descent. Each circle of Hell serves as a framework for progressively intricate sound processes, with contrasts, oppositions, and chaos interwoven. The composition balances abstract and literal interpretations, using sonic material to evoke the emotional and symbolic essence of Dante’s narrative. Through this piece, the composer invites the audience to engage in a multidimensional exploration of Dante’s infernal world, where sound becomes a medium to reflect on the moral and existential questions embedded in the text. Nine Dantean Circles is not merely a sonic representation but a deep, immersive experience that resonates with the timeless themes of The Divine Comedy.

Anselmo Guerra

Anselmo Guerra is a Full Professor at the Federal University of Goiás (UFG), Brazil. He holds a Bachelor’s degree in Composition and Conducting from the São Paulo State University (UNESP, 1986), a Master’s degree in Computer Music and Artificial Intelligence from the University of Brasília (UnB, 1992), and a PhD in Communication and Semiotics from the Pontifical Catholic University of São Paulo (PUC-SP, 1997). His doctoral research focused on interactive environments for computer-assisted musical composition. He conducted postdoctoral research in Computer Music at the Institute of Arts, UNESP (2012). Professor Guerra was a visiting researcher at the Center for Research in Computing and the Arts (CRCA) at the University of California, San Diego (1995-1996). Over his career, he has developed significant expertise in the intersection of music, science, and technology, contributing to algorithmic composition, electroacoustic music, music informatics, and interactivity. He has been instrumental in developing music research and education in Brazil as the coordinator of the Graduate Program in Music at UFG for three terms. Additionally, he founded and leads the Sound Research Laboratory (LPqS) at UFG, which promotes advances in spectral analysis, sound synthesis, and interactive performance. As the editor of Música Hodie, a peer-reviewed journal dedicated to music studies, he has curated interdisciplinary discussions on contemporary and electroacoustic music. Professor Guerra’s contributions to the field include numerous publications, artistic productions, and academic leadership roles, solidifying his position as a leading figure in integrating music and technology in Brazil and beyond.

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