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januari 07, 2004
Musik och komplexitet
Techno hits basic beat (Nature):
An obscure form of music known as Javanese Gamelan has won the top prize for musical complexity, according to a novel kind of musical analysis.
...
The method produces a number, denoted alpha that quantifies the complexity of patterns in a signal - in this case, the volume of music. A low alpha (less than 1) indicates relatively non-complex music, whereas more complex musical signals have a value of alpha equal to 1. When alpha is much higher than 1, the patterns are so complex that it sounds more like noise than music.
Gamelan has average values of alpha closest to 1, as does what the researchers characterize as 'new age music'. The averages for Western classical and Hindustani music are slightly higher.
Curiously, jazz and rock and roll have virtually identical average alpha values of about 0.9, challenging the notion that the latter is in some ways a debased, simplified version of the former. But then, in music, rhythm isn't everything.
Heather D. Jennings, Plamen Ch. Ivanov, A. M. Martins, P. C. da Silva, G. M. Viswanathan: Variance fluctuations in nonstationary time series: a comparative study of music genres.
Abstract
An important problem in physics concerns the analysis of audio time series generated by transduced acoustic phenomena. Here, we develop a new method to quantify the scaling properties of the local variance of nonstationary time series. We apply this technique to analyze audio signals obtained from selected genres of music. We find quantitative differences in the correlation properties of high art music, popular music, and dance music. We discuss the relevance of these objective findings in relation to the subjective experience of music.
Posted by hakank at januari 7, 2004 10:07 FM Posted to Komplexitet/emergens