DYNAMIC-SPECTRUM GENERATOR SYSTEM FOR THE SYNTHESIS OF MUSICAL SIGNALS / SISTEMA GERADOR DE ESPECTROS DINÂMICOS DESTINADOS À SÍNTESE DE SINAIS MUSICAIS
AUTOR(ES)
ALUIZIO ARCELA JUNIOR
DATA DE PUBLICAÇÃO
1977
RESUMO
It is presented a system capable of synthesize musical signals by generating and processing frequency spectra which can be placed anywhere in the áudio frequency range. For obtaining spectral components which are amplitude and phase controlable, a Fourier series generator was conveived through frequency multipliers which use phase- locked loop techniques. With this generator, there exists too the possibility of generate spectra whose upper partials are not harmonically related. The spectral processing is carried out by imposing a dynamic character to the partials: each of them is amplitude modulated by curves capable of assuming a plurality of forms, such that possibilities of musical work can be stablished. Further, a time generator system for control of the spectrum is described. Finallly , the means for shifting the spectrum within the audio frequency range is discussed.
ASSUNTO(S)
frequency multiplication musical signals phase-locked loop multiplicadores de freqÃencia sinais musicais redes de fase presa
ACESSO AO ARTIGO
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