20 resultados para Musical genre classification

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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Musical genre classification has been paramount in the last years, mainly in large multimedia datasets, in which new songs and genres can be added at every moment by anyone. In this context, we have seen the growing of musical recommendation systems, which can improve the benefits for several applications, such as social networks and collective musical libraries. In this work, we have introduced a recent machine learning technique named Optimum-Path Forest (OPF) for musical genre classification, which has been demonstrated to be similar to the state-of-the-art pattern recognition techniques, but much faster for some applications. Experiments in two public datasets were conducted against Support Vector Machines and a Bayesian classifier to show the validity of our work. In addition, we have executed an experiment using very recent hybrid feature selection techniques based on OPF to speed up feature extraction process. © 2011 International Society for Music Information Retrieval.

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In this letter, we present different approaches for music genre classification. The proposed techniques, which are composed of a feature extraction stage followed by a classification procedure, explore both the variations of parameters used as input and the classifier architecture. Tests were carried out with three styles of music, namely blues, classical, and lounge, which are considered informally by some musicians as being “big dividers” among music genres, showing the efficacy of the proposed algorithms and establishing a relationship between the relevance of each set of parameters for each music style and each classifier. In contrast to other works, entropies and fractal dimensions are the features adopted for the classifications.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Música - IA

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Nosso trabalho busca discutir o samba carioca e o documento produzido pelo Centro Cultural Cartola para registrar as matrizes do samba do Rio de Janeiro como um bem imaterial no Livro das Formas de Expressão criado pelo IPHAN em 2000. Para isso, buscamos compreender as diferentes expressões deste gênero musical e suas transformações narrativas, melódicas e timbrísticas que o transformaram de música marginal a símbolo de brasilidade e que o tornaram o ritmo da maior festa brasileira: o carnaval. Compreendemos que tal processo se deu em consonância com as transformações políticas, sociais e urbanísticas que a cidade do Rio de Janeiro sofreu nas primeiras décadas do século XX e que, o inventário e registro das matrizes do samba carioca é fruto não apenas dos anseios da comunidade de sambistas, mas também do diálogo destes com intelectuais e gestores públicos. Além disso, tal política voltada para a preservação e salvaguarda dos bens imateriais se coaduna com políticas e projetos urbanísticos de transformação de certos espaços citadinos em verdadeiros museus a céu aberto, como é o caso do Museu a Céu Aberto do Morro da Providência e da construção da Cidade do Samba, que expressam uma preocupação com a revitalização da área, a valorização imobiliária e o incremento da indústria do turismo.

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Pós-graduação em Ciências Sociais - FFC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Música - IA

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The literature investigated the effects of chronic baroque music auditory stimulation on the cardiovascular system. However, it lacks in the literature the acute effects of different styles of music on cardiac autonomic regulation. To evaluate the acute effects of baroque and heavy metal music on heart rate variability (HRV) in women. The study was performed in 21 healthy women between 18 and 30 years old. We excluded persons with previous experience with music instrument and those who had affinity with the song styles. All procedures were performed in the same sound-proof room. We analyzed HRV in the time (standard deviation of normal-to-normal respiratory rate (RR) intervals, root-mean square of differences between adjacent normal RR intervals in a time interval, and the percentage of adjacent RR intervals with a difference of duration greater than 50 ms) and frequency (low frequency [LF], high frequency [HF], and LF/HF ratio) domains. HRV was recorded at rest for 10 min. Subsequently they were exposed to baroque or heavy metal music for 5 min through an earphone. After the first music exposure they remained at rest for more 5 min and them they were exposed again to baroque or heavy metal music. The sequence of songs was randomized for each individual. The power analysis provided a minimal number of 18 subjects. Shapiro-Wilk to verify normality of data and analysis of variance for repeated measures followed by the Bonferroni test for parametric variables and Friedman's followed by the Dunn's post-test for non-parametric distributions. During the analysis of the time-domain indices were not changed. In the frequency-domain analysis, the LF in absolute units was reduced during the heavy metal music stimulation compared to control. Acute exposure to heavy metal music affected the sympathetic activity in healthy women.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)