Patent ID: 6930236

Claim:
An apparatus for analyzing music, comprising: a sound information storage unit, which separately stores sound information by types of instruments; a sound information selection unit, which selects sound information of a particular instrument from the sound information of different types of instruments stored in the sound information storage unit and outputs the selected sound information; a digital sound input unit, which receives externally performed music and converts it into a digital sound signal; a frequency analysis unit, which receives the digital sound signal from the digital sound input unit, decomposes it into frequency components, and outputs the frequency components in units of frames; a comparison/analysis unit, which receives the sound information output from the sound information selection unit and the frequency components output from the frequency analysis unit in units of frames, selects a lowest peak frequency from peak frequencies of the frequency components in each frame output from the frequency analysis unit, and detects sound information including the lowest peak frequency from the sound information output from the sound information selection unit; a monophonic component detection unit, which receives the detected sound information, the frequency components of the digital sound signal, and the lowest peak frequency from the comparison/analysis unit and detects, as a monophonic component, sound information that has peak information most similar to the lowest peak frequency in the sound information; a monophonic component removing unit, which receives the lowest peak frequency that has been used to detect the monophonic component and the frequency components of the digital sound signal from the monophonic component detection unit, removes the lowest peak frequency from the frequency components, and transmits the result of the removal to the comparison/analysis unit; a performance sound information detection unit, which combines monophonic components, which have been detected by the monophonic component detection unit, to detect performance sound information; and a performance sound information output unit, which outputs the performance sound information.