Abstract: A method and apparatus for detecting a pitch using frequency analysis are provided. An externally input digital signal is analyzed into frequency component values at predetermined time intervals, and positions of peaks of the digital signal are detected based on the frequency component values. It is determined whether a frequency at a maximum peak position among the peak positions is a pitch or a n-order harmonic frequency of the pitch to detect a pitch. Then, the range of the pitch is determined based on the range of a harmonic frequency of the detected pitch. Accordingly, an error range for the pitch detected using frequency analysis is minimized, thereby more exactly detecting a pitch when the pitch is detected using the frequency analysis.

Abstract: A method and apparatus for reproducing MIDI (music instrument digital interface) music based on synchronization information are provided. MIDI performance information is detected from a musical score and/or MIDI data. Synchronization information, which contains real performance onset time information on an onset time at which each of all notes included in the MIDI performance information is estimated to be performed, is generated from the MIDI performance information or a predetermined synchronization information file. MIDI music is reproduced based on a real MIDI performance table, which is generated by matching the MIDI performance information and the synchronization information. Accordingly, even if musical trainees do not have real performance sound played by a desired player, they can reproduce and listen to the player's performing music with only a small amount of score information and synchronization information.

Abstract: A score tracking method and apparatus are provided. The method detects frequency models of score notes to be performed, compiles a list of frequency models, and generates a matching model composed of frequency components, based on the list. The frequency components are included in audio data to be generated during a performance of the score notes. The method then receives external audio data during an actual performance of the score notes, converts the audio data into digital signal, and detects current performance frequency data from the digital signal. The method then determines whether the matching model matches the current performance frequency data when the current performance frequency data includes a new frequency component other than the frequency components of the matching model, generates synchronized information between the actual performance of the score notes and the score notes, and updates the matching model.

Abstract: Method and apparatus for designating performing notes based on synchronization information are provided. After detecting meta score information from a musical score or MIDI (Musical Instrument Digital Interface) data to be performed, note position information for all notes included in an electronic score is generated based on the musical score or the meta score information. By utilizing the note position information and synchronization information, which includes the sync performance time at which each note is to start to be performed, performing notes are designated on the electronic score at each time synchronized. The synchronization information may be generated from the meta score information or the MIDI data, or may be read from a synchronization information file stored in advance. Alternatively, the synchronization information may be generated in real time by analyzing live input sound.

Abstract: A pitch detection method and appartus are provided. The pitch detection method includes anlyzing an externally input digital signal into frequency components and detecting a pitch candidate based on the frequency components; comparing an error range for the pitch candidate with an error range, which is calculated using the error range or the result of performing autocorrelation on an autocorrelation range, which is calculated using the error range for the pitch candidate, permorming autocorrelation on the digital signal in a predetermined time range when the error range for the result of autocorrelation is less than or equal to the range for the pitch candidate; and determining a pitch within an intersection between a frequency range obtained using frequency analysis and a frequency range, in which an autocorrelation value is largest, as a final pitch.

Abstract: An apparatus for analyzing music based on sound information of instruments is provided. The apparatus uses sound information of instruments or the sound information and score information in order to analyze digital sounds. The sound information of instruments performed to generate digital sounds is previously stored by pitches and strengths so that monophonic notes and polyphonic notes performed by the instruments can be easily analyzed. In addition, by using the sound information, of instruments and score information together, input digital sounds can be accurately analyzed and can be detected in the form of quantitative data.

Abstract: A score tracking method and apparatus are provided.

Abstract: An apparatus for analyzing music based on sound information of instruments is provided. The apparatus uses sound information of instruments or the sound information and score information in order to analyze digital sounds. The sound information of instruments performed to generate digital sounds is previously stored by pitches and strengths so that monophonic notes and polyphonic notes performed by the instruments can be easily analyzed. In addition, by using the sound information of instruments and score information together, input digital sounds can be accurately analyzed and can be detected in the form of quantitative data.

Abstract: A method for analyzing digital-sounds using sound-information of instruments and/or score-information is provided. Particularly, sound-information of instruments which were used or which are being used to generate input digital-sounds is used. Alternatively, in addition to the sound-information, score-information which were used or which are being used to generate the input digital-sounds is also used. According to the method, sound-information including pitches and strengths of notes performed on instruments used to generate the input digital-sounds is stored in advance so that monophonic or polyphonic pitches performed on the instruments can be easily analyzed. Since the sound-information of instruments and the score-information are used together, the input digital-sounds can be accurately analyzed and output as quantitative data.

Abstract: A method and apparatus for detecting a pitch using frequency analysis are provided. An externally input digital signal is analyzed into frequency component values at predetermined time intervals, and positions of peaks of the digital signal are detected based on the frequency component values. It is determined whether a frequency at a maximum peak position among the peak positions is a pitch or a n-order harmonic frequency of the pitch to detect a pitch. Then, the range of the pitch is determined based on the range of a harmonic frequency of the detected pitch. Accordingly, an error range for the pitch detected using frequency analysis is minimized, thereby more exactly detecting a pitch when the pitch is detected using the frequency analysis.

Abstract: A method and apparatus for reproducing MIDI (music instrument digital interface) music based on synchronization information are provided. MIDI performance information is detected from a musical score and/or MIDI data. Synchronization information, which contains real performance onset time information on an onset time at which each of all notes included in the MIDI performance information is estimated to be performed, is generated from the MIDI performance information or a predetermined synchronization information file. MIDI music is reproduced based on a real MIDI performance table, which is generated by matching the MIDI performance information and the synchronization information. Accordingly, even if musicla trainees do not have real performance sound played by a desired player, they can reproduce and listen to the player's performing music with only a small amount of score information and synchronization information.

Abstract: Method and apparatus for designating performing notes based on synchronization information are provided. After detecting meta score information from a musical score or MIDI (Musical Instrument Digital Interface) data to be performed, note position information for all notes included in an electronic score is generated based on the musical score or the meta score information. By utilizing the note position information and synchronization information, which includes the sync performance time at which each note is to start to be performed, performing notes are designated on the electronic score at each time synchronized. The synchronization information may be generated from the meta score information or the MIDI data, or may be read from a synchronization information file stored in advance. Alteratively, the synchronization information may be generated in real time by analyzing live input sound.

Abstract: A pitch detection method and appartus are provided.The pitch detection method includes anlyzing an externally input digital signal into frequency components and detecting a pitch candidate based on the frequency components ;comparing an error range for the pitch candidate with an error range which is calculated using the error range or the result of performing autocorrelation on an autocorrelation range, which is calculated using the error range for the pitch candidate, permorming autocorrelation on the digital signal in a predetermined time range when the error range for the result of autocorrelation is less than or equal to the range for the pitch candidate: and detrmining a pitch within an intersection between a frequency range obtained using frequency analysis and a frequency range, in which an autocorrelation value is largest, as a final pitch.

Abstract: A method for analyzing digital-sounds using sound-information of instruments and/or score-information is provided. Particularly, sound-information of instruments which were used or which are being used to generate input digital-sounds is used. Alternatively, in addition to the sound-information, score-information which were used or which are being used to generate the input digital-sounds is also used. According to the method, sound-information including pitches and strengths of notes performed on instruments used to generate the input digital-sounds is stored in advance so that monophonic or polyphonic pitches performed on the instruments can be easily analyzed. Since the sound-information of instruments and the score-information are used together, the input digital-sounds can be accurately analyzed and output as quantitative data.