MusMat Journal Vol. V No. 2 is now available!
MusMat Research Group is glad to announce the release of the second number of the fifth volume of MusMat – Brazilian Journal of Music and Mathematics. This issue presents five original articles discussing different aspects of the intersection between Music and Mathematics. Juan Sebastián Arias-Valero, Octavio Alberto Agustín-Aquino, and Emilio Lluis-Puebla present a theoretical description of a model based on the generalization of first-species counterpoint considering arbitrary rings, which results in a broader mathematical theory for contrapuntal intervals. Carlos Mathias and Carlos Almada introduce an original proposal to encode timelines as univocal integers by using arithmetic mapping so that drum-set timelines are encoded by using Gödel’s Numbering algorithm. Paul Lombardi presents an interesting discussion on feathered beams, examining their concept and notation to propose a graphing system to deconstruct them using examples from George Crumb’s Night Music I. Hugo Carvalho proposes a new tool for performing time-frequency analysis on audio signals, the probabilistic spectrogram, that may allow for probabilistic interpretations related to the Discrete Fourier Transform and also the creation of new features for audio signal processing and music information retrieval. Finally, Juan Sebastián Arias-Valero and Emilio Lluis-Puebla present a specific and didactic application for gestural presheaves in the language of abstract gestures, dealing specifically with the relation thereof to the Yoneda embedding and Mazzola’s idea and gestural sheaves, demonstrating the application in Mozart and Beethoven. In this issue, we are also glad to inaugurate a new section with an interview with Severine Neff, discussing her work on Schoenberg’s music and theory.
