THRUSH begins with my reinterpretation of the same audio that Messiaen used for his transcriptions of the North American Songbirds, blackbird and wood thrush. These audio samples were digitized and analysed using PRAAT and C-Speech, from which I made new transcriptions that were more accurate representations of the physical acoustical signal. Of course, a temporal framework had to be established for these transcriptions, for which I decided to treat in a non-metrical fashion, since birds presumably do not think in terms of man-made meters and units. Then paired with the acoustical signal, I did research on the physical mechanism by which the birds produced sounds. These involved analyses of airflow, source, resonance and articulation for both blackbird and wood thrush. It was found that some bird species produce multiphonic & biphonic signals using paired bronchi, while others used a single bronchus. When using paired bronchi to produce two independent frequency contours, the dynamical interpretation would result in two simultaneous limit cycles; meanwhile, two independent frequency contours produced by a single bronchus would result in the occurrence of nonlinear phenomena, here interpreted as a torus.

#91. THRUSH performed by Moritz Ernst on 2020 - 11 - 06

Michael Edgerton is an active composer with performances around the world. His compositions have received international prizes and recognition including the important German award, the Kompositionspreis der Landeshauptstadt Stuttgart for his composition the Tempo Mental Rap, a series of six variations for guitar based upon a Steve Vai transcription of a Frank Zappa rap. Michael’s compositions utilize a broad range of musical influences such as European avant-garde, American experimentalism, progressive rock and world music. Since the mid-90s Michael’s compositions have been informed by scientific models and metaphors. Initially stemming from his studies with voice science and dynamical systems, he’s built a body of work that explores the integration of nonlinear concepts applied to sound production and compositional constraints. While the methods and systems he develops are often influenced by science, it is his intuition – his ear that gives birth to the music.

Michael is currently working as Professor of Artistic Research at Lund University/the Malmö Academy of Music in Sweden.

#91. THRUSH performed by Moritz Ernst on 2020 - 11 - 06

Michael Edward Edgerton, composition 2001-2018