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The article presents an analysis of the problems associated with signals processing, with special emphasis on the analysis of the problems of the human voice analysis. Based on the specific implementation of algorithms mark the human voice pitch, paper is showing the result in the form of standard music notation with treble and bass keys one the stave. The paper pays particular attention to the performance of the algorithms used for their implementation in Java. The same analysis of the signals is not a challenge, but with regard to the implementation on mobile devices like smarfones, the use of Java at the same time with limited hardware resources remains a challenge. This applies to both the CPU and the memory which affects the processing speed using the Java virtual machine. It should be remebered not to skip a quality of microphone used in this type of mobile device. From this point of view presented considerations are a new approach to the well-known problem of signal analysis implemented in computer applications such as Raven.

The implementation of signal analysis in java to determine the sound of human voice and its graphical representation in standard music notation