UNIVERSIDADE CATÓLICA PORTUGUESA Composing With

UNIVERSIDADE CATÓLICA PORTUGUESA Composing with Soundscapes Capturing and Analysing Urban Audio for a Raw Musical Interpretation Thesis submitted to the Portuguese Catholic University for the Doctoral Degree in Science and Technologies of the Arts - Computer Music by José Alberto Gomes SCHOOL OF THE ARTS April 2015 UNIVERSIDADE CATÓLICA PORTUGUESA Composing with Soundscapes Capturing and Analysing Urban Audio for a Raw Musical Interpretation Thesis submitted to the Portuguese Catholic University for the Doctoral Degree in Science and Technologies of the Arts - Computer Music By José Alberto Sousa Gomes Dissertation supervised by Prof. Doutor Álvaro Mendes Barbosa and co-supervised by Doutor Rui Luís Nogueira Penha. SCHOOL OF THE ARTS April 2015 This Doctorate Research was partially supported by the Portuguese Science and Technology Foundation (FCT), trough the award of the Doctorate Grant reference SFRH/BD/71405/2010. V Abstract VI José Alberto Gomes The sound environment is increasingly more relevant in contemporary culture. It is a ‘picture’ of a place, an X-ray of its character and activities, shapeless and amorphous, whilst full of meanings and subtleties. It is a transmission that is complementary to what a picture retains and transports. Therefore it is a unique, tangible impression of the place to which it belongs, and intrinsically, its history, and that of the people who inhabit it, and their relations. Murray Schafer termed this element as Soundscape. Although always a present element, it was only from the end of the Twentieth Century that it has been studied in a systematic way, initially in a more ecological and socio-cultural function approach, but slowly it has been seen as an artistic tool, both in direct use of the sounds as well as being an inspiration, and a starting point, for creation. The exploratory research project presented here aims to study the capture and analysis of the urban soundscape, with a special focus on its temporal evolution, and its application in the creative and artistic context. At the first stage, we try to understand how and, if possible, to capture and represent the most challenging part of this massive sound element, which is its constant changing on the time axis. Grasping its nuances on both small and large time scales. The second phase is to understand the pertinence of such information and its direct influence in the act of music and sonic creation. To achieve these goals a multidisciplinary approach based on two main pillars was necessary: Soundscape and Computer Music. These disciplines determine the scientific areas in which this research had to be focused. Due to the fact that this thesis has a relatively broad scope of interests, there is a survey of the state of the art relating to projects and approaches that relate to the interests of this investigation in different ways. In areas such as: Music Information Retrieval, Algorithmic Composition, Eco Composition, and Sound Maps. This survey confirms the contemporaneity, relevance and originality of the project, both scientifically and artistically. In order to evaluate the proposed approach to the soundscape, URB, an experimental system to capture, analyse and store the urban soundscape was developed and implemented. The system is based on current technology, but is affordable and robust. To ensure the sustainability of the project, development was based in open source technology, to ensure the possibility of the project expanding and shaping according to the interests and needs of specific places, populations, research centres and/ or artistic interests. Three main goals have guided the development of this system: addressing the lack of temporal perspective of the sound representation of urban spaces; the design of a free and autonomous system that depends only on the users, which results in a public free access database; to facilitate and systematize the access to data on the sound characteristics of an urban soundscape for both ecological studies as well as for creative and artistic purposes. A server keeps a record of the collected data, which can either be read directly, through an application developed for this purpose, or through a visual interface with a time-line approach, but always allowing for the possibility of creating original access tools that best serve the user’s purposes. After implementing the system, through four listening points, and confirming its robustness, we advance to the system’s application in the development of artistic works. For this purpose a challenge was proposed to a number of artists with distinct aesthetic backgrounds and training. This challenge resulted in different works that were presented to the public in different formats and media, such as works for classical instrumental, electro-acoustic works, improvisational moments with real-time sonification of the soundscape, sonic installations and sculptures powered by the system presented. This practice leads to a fundamental Composing with Soundscapes: Capturing and Analysing Urban Audio for a Raw Data Musical Interpretation - PhD Thesis VII reflection in this research. We describe the different approaches chosen by each creator and primarily assess the pertinence in the artistic result of using a continuous and discrete system of urban soundscape analysis, from a creator’s point of view as well as from a listener’s point of view. With this research we are able to present a functional approach to the lack of temporal perspective in the usual sound maps that focus on the geographic origin of the recordings. We conclude that soundscapes can provide useful data for artistic creation and we promote a direct connection between that kind of approach and the artists. Even before the works developed and the artist’s feedback, whilst not ignoring the different approaches and opinions, we can conclude that this approach seems to promote new and functional soundscape composition ideas, making URB a relevant resource to compose original soundscape based music. Also, through analysis of the pieces, we could point out patterns of the technical and artistic choices on how to deal with information from the soundscape data, both in deferred time and real-time. IX Resumo X José Alberto Gomes A paisagem sonora é cada vez mais relevante na cultura contemporânea. É uma ‘fotografia’ de um lugar. Uma radiografia ao seu carácter e atividades, simultaneamente disforme e amorfa como repleta de significados e subtilezas. Uma transmissão complementar ao que a imagem retém e transporta. É portanto uma impressão única , tangível do lugar a que pertence e, intrinsecamente , da sua história , das pessoas que o habitam, das suas relações. Murray Schafer batizou este elemento como Sounds- cape (Paisagem Sonora). E embora tenha sido sempre um elemento presente, só a partir do final do séc. XX é que tem vindo a ser estudado de uma forma sistematizada, inicialmente numa abordagem mais ecológica e das suas funções socioculturais, mas lentamente encarado como uma ferramenta artística tanto no uso direto dos sons, como sendo o ponto de partida de inspiração para a criação. O projeto de investigação de carácter exploratório que aqui apresentamos visa o estudo da recolha e análise da paisagem sonora urbana, com especial enfoque na sua evolução temporal e da sua aplica- ção no contexto criativo artística. Como tal, numa fase inicial, procurar entender como e, se possível, capturar e representar o elemento mais desafiante que é a permanente mutação sonora no eixo temporal, apreendendo as suas nuances tanto numa escala de tempo diminuta como em grandes escalas temporais. Numa segunda fase entender a pertinência desta informação e da sua influência direta no ato da criação musical e sonora. Para cumprir estes objectivos foi necessária uma abordagem multi- disciplinar fundamentada em dois pilares principais: Paisagem-Sonora e Informática Musical. Estas disciplinas determinam as áreas científicas em que esta investigação se debruçou. Tendo esta tese um âmbito de interesses relativamente amplo, há um levantamento do estado da arte referente a projetos e abordagens de áreas distintas que ,de diferentes formas , se relaciona com os interesses da nossa investigação. Em áreas como: Musical Information Retrieval, Composição Algorítmica, Eco Composição, Mapas Sonoros. Este levantamento confirma a atualidade, a pertinência e a originalidade do projeto, tanto cientificamente como artisticamente. A fim de avaliar a abordagem proposta à paisagem sonora, foi desenvolvido e posto em prática um sistema experimental de captura, análise e armazenamento de ambiente sonoro urbano, de nome URB. Sistema esse baseado em tecnologia atual, mas acessível e robusta para garantir a sustentabilidade do projeto e apoiado em desenvolvimento código aberto para garantir a possibilidade do projeto se ex- pandir e se moldar de acordo com os interesses e necessidades concretas de locais, populações, centros de investigação e interesses artísticos. Três objetivos principais guiaram o desenvolvimento deste sistema: colmatar a falta de perspectiva temporal em grande escala de uma representação sonora de um espaço urbano; o desenho de um sistema que livre e autónomo, que apenas dependa dos utilizadores, que resulte numa base de dados de acesso público e gratuito; facilitar e sistematizar o acesso à infor- mação sobre as caraterísticas sonoras de um ambiente sonoro urbano tanto para estudos ecológicos como para função criativa e artística. É mantido num servidor o registo de toda a informação recolhi- da,

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