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Implementation and optimization of the synthesis of musical instrument tones using frequency modulation
Frequency modulation (FM) as an efficient method to synthesize musical sounds is of great importance in the area of computer music. In this thesis, the estimation of fundamental frequency, the FM synthesis procedure of musical instrument tones and the optimization on FM synthesis were analysed, evaluated, improved and implemented. A FM analysis and synthesis environment was developed, in which the presented work in this thesis were implemented. For the estimation of fundamental frequency of music signals, an algorithm based on harmonic pattern match (HPM) was designed to achieve more reliable estimation accuracy. After defining the spectrum subset, the autocorrelation was applied on the spectrum subset to exploiting candidates of fundamental frequency, and an efficient mechanism to evaluate the match between each candidate and the harmonic pattern of the musical signal was designed. Evaluation of the proposed algorithm and several other estimation algorithms was performed. For the implementation of FM synthesis, the matching procedure of spectra using genetic algorithm (GA) was described, including the definition of the task in GA and the searching procedure of optimized FM parameters through GA. For the optimization on FM synthesis, the requirements of carrier and modulator were analysed and the parameter space was examined, based on which a method for the predetermination of parameter space was designed to achieve accurate synthesis results. For data reduction in FM synthesis, the piecewise linear approximation of the carrier amplitude envelope was designed. Further step on the FM synthesis optimization was implemented by the combination of formants in the spectra matching procedure, in which the formant harmonics were emphasized by the weighting coefficients to achieve more accurate timbre of the synthesized sounds. The spectral envelope estimation and the formant extraction were analysed and implemented. For the analysis and implementation of FM synthesis, a testing environment program was developed, ...
Implementation and optimization of the synthesis of musical instrument tones using frequency modulation
Frequency modulation (FM) as an efficient method to synthesize musical sounds is of great importance in the area of computer music. In this thesis, the estimation of fundamental frequency, the FM synthesis procedure of musical instrument tones and the optimization on FM synthesis were analysed, evaluated, improved and implemented. A FM analysis and synthesis environment was developed, in which the presented work in this thesis were implemented. For the estimation of fundamental frequency of music signals, an algorithm based on harmonic pattern match (HPM) was designed to achieve more reliable estimation accuracy. After defining the spectrum subset, the autocorrelation was applied on the spectrum subset to exploiting candidates of fundamental frequency, and an efficient mechanism to evaluate the match between each candidate and the harmonic pattern of the musical signal was designed. Evaluation of the proposed algorithm and several other estimation algorithms was performed. For the implementation of FM synthesis, the matching procedure of spectra using genetic algorithm (GA) was described, including the definition of the task in GA and the searching procedure of optimized FM parameters through GA. For the optimization on FM synthesis, the requirements of carrier and modulator were analysed and the parameter space was examined, based on which a method for the predetermination of parameter space was designed to achieve accurate synthesis results. For data reduction in FM synthesis, the piecewise linear approximation of the carrier amplitude envelope was designed. Further step on the FM synthesis optimization was implemented by the combination of formants in the spectra matching procedure, in which the formant harmonics were emphasized by the weighting coefficients to achieve more accurate timbre of the synthesized sounds. The spectral envelope estimation and the formant extraction were analysed and implemented. For the analysis and implementation of FM synthesis, a testing environment program was developed, ...
Implementation and optimization of the synthesis of musical instrument tones using frequency modulation
Luo, Li (Autor:in) / Jung, Peter
22.06.2017
Hochschulschrift
Elektronische Ressource
Englisch
Study and representation of complex tones in musical acoustics
| Engineering Index Backfile | 1953
| Engineering Index Backfile | 1934
| Engineering Index Backfile | 1937