Patent ID: 7189912

Claim:
A score tracking method comprising: detecting frequency models with pitch and length information of score notes to be performed, and compiling a list of frequency models; generating a matching model, which is composed of frequency components that are included in audio data to be generated during a performance of the score notes, based on the frequency model list; receiving external audio data during an actual performance of the score notes, converting the audio data into digital signal, and detecting current performance frequency data from the digital signal; determining whether the current performance frequency data includes a new frequency component; determining whether the matching model matches the current performance frequency data when the new frequency component is included in the current performance frequency data; and generating synchronized information between the actual performance of the score notes and the score notes and updating the matching model, when it is determined that the matching model matches the current performance frequency data; wherein detecting frequency models with pitch and length information of score notes to be performed, and compiling a list of frequency models comprises: reading information of the score notes to be performed; determining whether there is audio information about musical instruments to be played according to the score notes; when it is determined that there is audio information about musical instruments, extracting audio information of each score note, from the audio information about musical instruments and detecting the frequency model list using peak values among frequency components of the audio information of each score; and when it is determined that audio information about musical instruments does not exist, extracting harmonic frequency components of each score note, which corresponds to each type of musical instrument, and detecting the frequency model list using peak values among the harmonic frequency components.