This paper corresponds to a review of newest sound synthesis techniques and contains the development of an automatic tuning system based on a fuzzy logic controller intended to emulate the human expertise in this field.The idea of “tuning” a synthesized musical instrument and the application of automatic tuning procedures by means of intelligent systems is also described. If we consider the synthesis as a whole process which involves the reproduction of every aspect that determines the realistic sound of the musical instruments, tuning the synthesizer as a human expert does becomes meaningful.-This paper corresponds to a review of newest sound synthesis techniques and contains the development of an automatic tuning system based on a fuzzy logic controller intended to emulate the human expertise in this field.The idea of “tuning” a synthesized musical instrument and the application of automatic tuning procedures by means of intelligent systems is also described. If we consider the synthesis as a whole process which involves the reproduction of every aspect that determines the realistic sound of the musical instruments, tuning the synthesizer as a human expert does becomes meaningful.