Abstract: An apparatus for analyzing audio includes a feature acquirer, an output apparatus, at least one memory, and at least one processor. The at least one processor is configured to execute a program stored in the at least one memory. The at least one processor is also configured to cause the feature acquirer to acquire a series of feature amounts of an audio signal. The at least one processor is also configured to generate boundary data by inputting the acquired series of feature amounts into a boundary estimation model that has learned relationships between: (i) a series of feature amounts, and (ii) boundary data representative of boundaries, each of the boundaries being between consecutive periods in each of which a chord is continuous.

Abstract: A method includes displaying a user interface of a digital audio workstation, which includes a first region for generating a composition. The first region includes a first compositional segment that has been added to the composition by a user. Based on the first compositional segment, one or more recommended predefined compositional segments are identified and displayed in a second region. The method includes receiving the selection of a second compositional segment. The method includes adding the compositional segment to the composition.

Abstract: Method of teaching a vocal harmony involves a computing device which automatically generates a plurality of audio presentations of a musical composition in a predetermined series. Each audio presentation in the series is different from the other audio presentations in the series and is configured to assist the user in progressively learning the selected vocal harmony part. Each of the plurality of audio presentations in the predetermined series is made different from others of the audio presentation in the predetermined series by selectively controlling (1) the particular ones of the plurality of vocal harmony parts that are included in each of the audio presentations, and/or (2) a magnitude of an audio volume that is applied to each of the plurality of vocal harmony parts that is included in each of the audio presentations.

Abstract: A musical input device accepts user input and generates output data indicative of musical notes. Based on a selected musical scale, a first set of keys is configured, such that each key of the first set outputs a respective chord associated with the scale. A second set of keys may be configured to output individual notes from the scale, or chords that are associated with a different scale. The keys may be provided with visible indicia, such as a color indicating the root note of a chord. Visible indicia may indicate relationships between keys, such as a melody note that matches the root note of a chord. Control keys may be used to add notes to chords or modify notes in chords, such as by adding additional octaves to the output or modifying the voicing, inversion, or spread of a chord.

Abstract: A method, apparatus, and User Interface, and product for assisting users learning to play the Chords of any selected Song quickly and easily and provide a Means to quickly and easily generate the individual Note sounds for the Chords of the selected Song employing a broad range of Virtual and Physical Instrument.

Abstract: An input device accepts user input and generates data indicative of notes, such as MIDI data. The input device includes a set of chord keys and a set of melody keys. A desired scale is selected, and the chord keys and melody keys are configured to utilize notes associated with that scale. The chord keys may be representative of all non-inverted chords associated with that scale. Inverted chords may be accessed using other keys or key combinations. Upon activation of an individual chord key, MIDI data representative of the notes in that chord is generated. Upon activation of an individual melody key, MIDI data representative of a single note from the scale is generated. Conflicts between notes associated with activated and released keys are resolved. Keys illuminated with a color associated with a particular note facilitate user recognition of that note in the chord keys and melody keys.

Abstract: A gesture detection system having a gesture detection apparatus to detect a gesture of a user, and a mobile communication terminal that can communicate with the gesture detection apparatus, includes a storage unit to store first gesture data defining the gesture of the user, and audio or visual data associated with the first gesture data; an obtainment unit to obtain second gesture data representing the gesture of the user; a transmission unit to transmit the second gesture data to the mobile communication terminal; a determination unit to determine whether the gesture defined by the first gesture data is the same as the gesture represented by the second gesture data; a selection unit to select the audio or visual data associated with the first gesture data depending on the determination result; and an output unit to output the audio or visual data.

Abstract: A user interface implemented on a touch-sensitive display for a virtual musical instrument comprising a plurality of chord touch regions configured in a predetermined sequence, each chord touch region corresponding to a chord in a musical key and being divided into a plurality of separate touch zones, the plurality of chord touch regions defining a predetermined set of chords, where each of the plurality of separate touch zones in each region is associated with one or more preselected MIDI files stored in a computer-readable medium. In some embodiments, the touch zones are configured to provide different harmonic configurations of a base chord associated with the chord touch region. Some harmonic configurations provide progressively wider harmonic ranges across each adjacent touch zone. Other harmonic configurations can provide chords with a progressively higher relative pitch across each adjacent touch zone.

Abstract: Communicating using sound includes choosing a musical genre, encoding data by selecting musical chords from a chord alphabet, where different musical chords from the chord alphabet represent different symbols from the data alphabet decodable by a receiver and wherein musical chords that are used for the chord alphabet are provided according to the musical genre that is chosen, constructing a tune using the musical chords selected in connection with encoding data, and playing the tune to a receiver. A transmitter may play the tune to the receiver and one of: the receiver and the transmitter may be a mobile device. A receiver may require authentication to decode received data. Constructing the tune may include adding filler chords that do not encode any data and cause the tune to be more aesthetically pleasing.

Abstract: Musical performance/input systems, methods, and products can accept user inputs via a user interface, generate, sound, store, and/or modify one or more musical tones. The user interface can present one or more regions corresponding to related chords. A set of related chords and/or a set of rhythmic patterns are generated based on a selected instrument and a selected style of music. The related chords can be modified via one or more effects units.

Abstract: A musical instrument including a housing, a keypad having a plurality of push buttons arranged in a three-dimensional array of horizontal rows and vertical columns disposed within the housing and a CPU with MIDI and USB processing coupled to the keypad to manipulate and control a sound generated with signals from the plurality of push buttons, wherein the horizontal rows of push buttons are arranged in tiers.

Abstract: Musical performance/input systems, methods, and products can accept user inputs via a user interface, generate, sound, store, and/or modify one or more musical tones. The user interface can present one or more regions corresponding to related chords. A set of related chords and/or a set of rhythmic patterns are generated based on a selected instrument and a selected style of music. The related chords can be modified via one or more effects units.

Abstract: An accompaniment data generating apparatus has a storing portion 15 for storing sets of phrase waveform data each related to a chord identified on the basis of a combination of chord type and chord root, and a CPU 9. The CPU 9 carries out a chord information obtaining process for obtaining chord information by which a chord type and a chord root are identified, and a chord note waveform data generating process for generating phrase waveform data indicative of chord notes of the chord root and the chord type identified by the obtained chord information in accordance with the obtained chord information by use of the sets of phrase waveform data stored in the storing portion 15, and outputting the generated data as accompaniment data.

Abstract: The invention relates to systems, methods, and apparatus for assessing a musical performance of a chord, a chord series, or a chord progression. The performance can include a user's performance of a musical instrument. MIDI or audio notes are input and compared to the notes of music track. An indication can be provided to assess the performance. The assessment can be on the basis of timing and/or pitch errors. A new chord can be displayed to a user based on the assessment of the user's performance of the previous chord.

Abstract: An accompaniment data generating apparatus has a storage device 15 for storing a set of phrase waveform data having a plurality of constituent notes which form a chord, and a CPU 9. The CPU 9 carries out a process for separating the set of phrase waveform data having a plurality of constituent notes which form a chord into a plurality of sets of phrase waveform data each having different one of the chord constituent notes, an obtaining process for obtaining chord information by which a chord type and a chord root are identified, and a chord note phrase generating process for pitch-shifting one or more of the separated phrase waveform data sets in accordance with chord type and combining the separated phrase waveform data sets including the pitch-shifted phrase waveform data to generate waveform data indicative of a chord note phrase as accompaniment data.

Abstract: A chord-information storage stores chord-type information and information on relationship between constituent notes including a tonic of the chord as chord information. Upon specification of a tonic, a first instruction display reads out chord information, and then causes a display to show relationship information for a constituent note other than the tonic, chord-type information, and an indicator indicating positional relationship between the tonic and each constituent note on music-playing operators. Every time another note is specified after the tonic, a second instruction display extracts chord information including relationship information that matches with relationship between the specified tonic and all notes specified after the tonic, and causes the display to show relationship information of a constituent note other than the specified notes, chord-type information, and an indicator indicating positional relationship between the tonic and each constituent note on music-playing operators.

Abstract: A method of correlating scales or chords that is represented as color codes, number codes, or both. The method involves correlating at least one chord with another. The method also involves correlating scales with one another. Furthermore, the method involves correlating chords with scales as well. Notes of scales or chords are assigned colors. Notes of one scale or chord are assigned one color. Notes of another scale or chord are assigned another color. Then at least one distinguishing color is assigned to notes that occur in more than one scale or chord in the correlation. Also, when chords are correlated with scales, distinguishing colors are assigned to notes that occur in more than one musical concept. When more than two chords or scales are correlated by the method, different distinguishing colors are assigned to notes that occur in three or more scales or chords.

Abstract: A method for obtaining a chord progression based upon a diatonic major key may include the steps of casting a dodecahedron to determine the diatonic major key, casting a octahedron to determine a chord based upon the diatonic major key and casting a cube to determine a playing strategy for the chord.

Abstract: Improvisation or playing along with a musical group or with a song is enjoyable to people and musicians of all ability levels. However, it is easy to play notes which do not harmonize with other notes and pitches which are being played. Provided herein is a method, computer program product and electronic device for assigning a set of pitches to a plurality of physical keys of an electronic device. The method may include the steps of obtaining an input chord, disassembling the chord into at least one base note and a plurality of individual voices, arranging a predetermined number of voices of the chord according to at least one predefined rule, and assigning at least one set of pitches to a plurality of physical keys of an electronic device, said set of pitches corresponding to the base note and arranged predetermined number of voices of the chord.

Abstract: The number of chords belonging to a first chord group is decreased to less than the number of chords belonging to a second chord group. In a first detection mode, when a first determining unit determines that a state of key depressed does not correspond to any chord in a first chord group, a previously selected chord is continuously determined. Accordingly, even if a chord detection is performed on a change of melody point by point, the number of chords substantially detected is decreased. This decreases the number of changes in accompaniment, thus stabilizing a playback of the accompaniment.

Abstract: A system and method that enables a user to generate and manipulate string-instrument chord grids in a digital audio workstation. The system and method for generating a string-instrument chord grid includes receiving first data input and second data input. The first data input can include a chord root note and/or a position for one or more fingering dots. The second data input can include an instrument type and our tuning for one or more strings. Using the received data input, a processor generates an entered string-instrument chord based and displays the entered string-instrument chord on a grid. The processor can also generate and display the musical name of the entered string-instrument chord.

Abstract: A process and a system are disclosed for some embodiments of the invention that map MIDI signals in a manner which always puts the harmony and melody octaves of an electronic MIDI keyboard in perfect pitch for a user of the keyboard. The process of some embodiments includes (i) receiving a selection of a key signature, (ii) receiving a selection of a scale, (iii) organizing the left side octave(s) (“chord” side) into a chord generator that places all scale tones on white keys and applies a chord effect to each white key, relative to the scale tone position, and (iv) organizing the right side octave(s) (“melody” side) into a melody lock that provides multiple settings for mapping the seven scale tones onto white keys.

Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for generating customized chords. An exemplary method includes providing a storage medium, including a database storing data corresponding to a plurality of predefined chords to be played by the virtual instrument. The method then includes receiving a plurality of user inputs that enable a user to select a desired custom chord other than a predefined chord stored in the database, the user inputs being displayed on a display of said device. The method further includes creating the desired chord from the predefined chord data stored in the database in accordance with a predefined algorithm, and causing data corresponding to the created custom chord to be stored by the device such that the virtual instrument is able to play the created desired chord.

Abstract: Provided are a method, automatic accompaniment device, and electronic keyboard for controlling automatic accompaniment in an electronic musical instrument. Recognition is made of chords played on the electronic musical instruments from at least one note played on the electronic musical instrument. Automatic accompaniment is initiated in response to pressure applied to a pedal coupled to the electronic musical instrument. The automatic accompaniment automatically plays sounds of at least one instrument to accompany the playing of the electronic musical instrument. Recognition is made of a chord played based on at least one played note after initiating the automatic accompaniment and the automatic accompaniment is played in the recognized chord.

Abstract: A chord detection apparatus capable of detecting a wide variety of chords musically related to realtime performance. Degree name candidates each having a function that can come next are extracted in a first extraction process, degree name candidates corresponding to an interrupted cadence are extracted in a second extraction process, and degree name candidates corresponding to a non-functional chord progression technique are extracted in a third extraction process. The degree name candidates extracted in these extraction processes are developed into chord names according to a current tonality, and one of chords represented by the chord names is selected according to performance data and output to an automatic accompaniment apparatus for sound production.

Abstract: A user interface for a virtual musical instrument presents a number of chord touch regions, each corresponding to a chord of a diatonic key. Within each chord region a number of touch zones are provided, including treble clef zones and bass clef zones. Each treble clef touch zone within a region will sound a different chord voicing. Each bass clef touch zone will sound a bass note of the chord. Other user interactions can modify or mute the chords, and vary the bass notes being played together with the chords. A set of related chords and/or a set of rhythmic patterns can be generated based on a selected instrument and a selected style of music.

Abstract: An information processing apparatus is provided which includes a beat analysis unit for detecting positions of beats included in an audio signal, a structure analysis unit for calculating similarity probabilities, each being a probability of similarity between contents of sound of beat sections divided by each beat position detected by the beat analysis unit, and a bar detection unit for determining a likely bar progression of the audio signal based on bar probabilities determined according to the similarity probabilities calculated by the structure analysis unit, the bar probabilities indicating to which ordinal in which meter respective beats correspond.

Abstract: An instrument-playing portable communication device is provided. The device includes an instrument-playing key unit having one or more keys, provided on a body of the instrument-playing portable communication device. When a user selects a chord of a selected instrument by pressing at least one of the one or more keys, the instrument-playing key unit converts the at least one key press into a first signal. The device also includes a sensor unit mounted in the body, for sensing a motion of a user. When the user presses the at least one of the one or more keys and moves in a location near the sensor unit, the sensor unit senses a motion of the user and converts the motion into a second signal. The device further includes a controller for receiving the first signal from the instrument-playing key unit and the second signal from the sensor unit, generating a tone frequency of the selected instrument based on the received signals, and converting the tone frequency into a tone.

Abstract: When musical performance data is input to the electronic musical instrument in accordance with user's operation for musical performance, the electronic musical instrument detects a chord in accordance with the input musical performance data at the defined timing T3 at which the chord detection timing ends. On the electronic musical instrument, furthermore, the application of the detected chord to the musical performance is instructed by user's pedal (foot switch) operation of turning off the pedal. In a case where the instruction to apply the chord has been already accepted at the chord detection timing T3 or in a case where the instruction to apply the chord has been accepted by user's pedal-off operation at a point in time (Tpf) situated between the chord detection timing T3 and the time limit T4, the detected chord is to be applied to the musical performance.

Abstract: A system and method that enables a user to generate and manipulate string-instrument chord grids in a digital audio workstation. The system and method for generating a string-instrument chord grid includes receiving first data input and second data input. The first data input can include a chord root note and/or a position for one or more fingering dots. The second data input can include an instrument type and our tuning for one or more strings. Using the received data input, a processor generates an entered string-instrument chord based and displays the entered string-instrument chord on a grid. The processor can also generate and display the musical name of the entered string-instrument chord.

Abstract: Melody and accompaniment audio signals are received and processed to identify one or more harmony notes and a harmony signal is produced based on the one or more harmony notes. Typically the melody note is identified and a spectrum of the accompaniment audio signal and is obtained, and one or more harmony notes are identified based on the melody note and the accompaniment spectrum. The melody, and accompaniment signals can be processed in real-time for combination with the harmony signal in an audio performance. In some examples, audio signals are processed and harmonies generated for subsequent performance based on, for example, MIDI files generated from the audio signals.

Abstract: CPU 11 reads from RAM 13 pitch information of each of musical notes composing the music, fingering information for playing the musical notes, and time information of the musical notes, thereby calculating a difficulty level of music. CPU 11 calculates a fingering difficulty level concerning fingering of playing adjacent musical notes based on the pitch information and fingering information, a rhythm difficulty level concerning musical-note duration and timing of key playing based on the time information, and a key difficulty level concerning a key of music based on the pitch information. Further, CPU 11 calculates the whole difficulty level of music based on the fingering difficulty level, rhythm difficulty level and key difficulty level.

Abstract: Methods for automatically analyzing and/or performing music are described. One embodiment concerns a method for assigning chords to a musical score indicative of a sequence of time segments, each time segment comprising at least one note, the method comprising assigning a chord to each time segment responsive to consonance/dissonance relationships between the assigned chord and the notes of at least two of the time segments. Optionally, consonance/dissonance relationships include existence of a dissonant between a chord assigned to a time segment and a note of the time segment and existence of resolution to said dissonant.

Abstract: The present invention relates to an information processing device, an information processing method, and a recording medium for analyzing chord progressions more accurately. A featuring quantity extraction unit 41 extracts respectively a probability of given chords appearing simultaneously, a probability of transition from a given chord to another chord, if the given chord appeared, and a probability of transition of a given chord originating from another chord, if the given chord appeared, from chord progressions of musical compositions by analyzing waveforms of said musical compositions. A chord similarity calculation unit 42 calculates the similarities between the chord progressions of musical compositions and the user-input chord progressions based on those extracted these possibilities. A musical composition retrieving unit 43 retrieves musical composition chord progressions similar to the user-input chord progression based on the calculated similarities.

Abstract: A graphical user interface for facilitating generation of an accompaniment for a recorded audio melody is described. A Hidden Markov Model, trained with blended chord transition matrices and melody observation matrices, is used for providing the accompaniment for the recorded audio melody. The recorded audio melody includes segments. Frequency analysis of the recorded audio melody is performed. The total duration of each fundamental frequency within a segment of the melody is summed. Based on the summing, a probability for each possible chord for each segment is computed. Based on the computed probabilities, a set of chords are selected for the segments. The chords are displayed on a chord chart of the graphical user interface. The graphical user interface facilitates various manipulations using the chords and/or controls, and generation of a new accompaniment for a recorded audio melody based on the manipulations.

Abstract: First, an extracting unit extracts chord progression of a tune to be reproduced. Then, a timing detector detects the timing of variation of the chord progression extracted by the extracting unit. Subsequently, an add-tone reproducing unit combines an add-tone with the tune to be reproduced according to the timing detected by the timing detector. The add-tone reproducing unit can also move a sound image to reproduce the tune or reproduce the tune as an arpeggio.

Abstract: An electronic keyboard instrument which is capable of easily carrying out an arpeggio performance rich in variety by a simple operation on a touch strip. The electronic keyboard instrument has a belt-like touch strip on which a player slides his finger while touching it to carry out an arpeggio performance. A CPU causes musical tones of respective pitch names included in respective designated component pitch names to be sounded, in a predetermined arpeggio pattern having a predetermined sounding order, according to detected touch positions on the touch strip, for the arpeggio performance. A musical tone generating circuit for generating musical tones for the arpeggio performance is switched between first and second tone generator circuits for generating musical tones based on key-on information detected on swingable keys and a third tone generator circuit dedicated to generation of musical tones for the arpeggio performance.

Abstract: A musical keyboard includes a plurality of white keys and black keys. As a number of keys are depressed simultaneously, a pattern of the depressed keys is judged as categorized in a number of predetermined patterns of depressed keys in view of the white keys and the black keys based on the input note data acquired from the depressed keys. A plurality of types of harmonization are predetermined, from among which a type of harmonization is determined. According to the determined type of harmonization, the input note data representing the notes of the depressed keys are adjusted so that inadequate notes included in the input notes are changed to adequate notes to constitute a chord as permitted by the type of harmonization in view of musical grammar. An unskilled player can play music incorporating improvisation which would need higher musical skill, as the inadvertently erroneous depression of the keys is rectified in the note data processing.

Abstract: The ROM 101 stores a chord scale note table composed of a plurality of scale by 12 notes starting from a chord tone in which C note is given as a root note and arranging a chord scale note as an inverted form of a chord in which the note is given as the lowest note. Where there is any change in chord at a beginning note of a phrase, or while phrase is played, notes are replaced to suppress note jump by using the chord scale note table. Where time from the previous key-on to the current key-on is in excess of a predetermined time, the note jump will not be suppressed.

Abstract: A graphical user interface for facilitating generation of an accompaniment for a recorded audio melody is described. A Hidden Markov Model, trained with blended chord transition matrices and melody observation matrices, is used for providing the accompaniment for the recorded audio melody. The recorded audio melody includes segments. Frequency analysis of the recorded audio melody is performed. The total duration of each fundamental frequency within a segment of the melody is summed. Based on the summing, a probability for each possible chord for each segment is computed. Based on the computed probabilities, a set of chords are selected for the segments. The chords are displayed on a chord chart of the graphical user interface. The graphical user interface facilitates various manipulations using the chords and/or controls, and generation of a new accompaniment for a recorded audio melody based on the manipulations.

Abstract: Disclosed is a method for generating audio data automatically and a personal terminal and a recorded medium using the same. Disclosed method comprises the steps of: (a) detecting pitch of inputted sound source; (b) generating a unit tone data using detected pith variation information; (c) generating an interval code using ratio information of unit tones included in the unit tone data; (d) generating a harmony code based on the generated interval code; (e) generating an accompaniment template using the harmony code and pre-stored accompaniment related template; and (f) generating an audio data where main melody of the inputted sound source and the accompaniment data are merged. Users can generate polyphonic ringtone sound automatically through a personal terminal itself without downloading.

Abstract: A method for generating an accompaniment for a recorded audio melody includes providing a recorded audio melody that includes segments; performing a frequency analysis of the recorded audio melody; summing the total duration of each fundamental frequency within a segment of the melody; based on the summing, computing a probability for each possible chord for each segment; based on the computed probabilities, selecting a set of chords for the segments; and outputting the set of chords as an accompaniment for the recorded audio melody. Various other methods, devices, systems, etc. are also disclosed.

Abstract: An apparatus for determining a type of chord has a means for providing a reference vector for the type of chord, a means for providing a reference vector from a test signal, and a means for comparing the reference vector with the test signal vector. The means for providing a reference vector is configured to provide, for the type of chord, a reference vector from a plurality of different reference vectors. In addition, the means for providing a test signal vector from the test signal is configured to provide the test signal vector having a plurality of test signal vector elements.

Abstract: As a player inputs a performance of a music piece by playing a musical instrument or singing a song, an add-on apparatus automatically starts an add-on progression such as an accompaniment to the music piece, a score and word display of the music piece and a picture display for the music piece. The apparatus stores a plurality of accompaniment or score-and-word or picture data files each corresponding to each of a plurality of music pieces. The apparatus recognizes the music piece under the performance inputted by the player, selects the accompaniment or score-and-word or picture date file which corresponds to the recognized music piece, and causes the accompaniment progression or score-and-word display or picture display to start automatically and run along with the progression of the music piece automatically.

Abstract: Disclosed herein is a signal processing apparatus, including: removal means for removing, from a sound signal in the form of a stereo signal, a center component which is a component of sound positioned at the center between the left and the right; extraction means for extracting, from the sound signal from which the center component is removed, first feature quantity representative of characteristics of sounds of different tones of the 12-tone equal temperament within a predetermined range; and decision means for deciding a chord within the predetermined range using the first feature quantity.

Abstract: The invention provides methods and apparatuses for creating a two-dimensional graphical representation of music which has been analysed into a chord sequence, by evaluating a first parameter of each chord, e.g. the harmonic root, determining a first display coordinate for each chord in dependence on the evaluated first parameter, determining a second display coordinate for each chord within the sequence in dependence on the time of occurrence of each chord within the sequence, and displaying the chords graphically at positions defined by the determined.

Abstract: An intonation training device for training musicians in just intonation. As disclosed, the device is a pocket-sized portable device with an audio output and a user interface which includes an LCD display and a device such as a push button for selecting an item from a menu. When the device is turned on, the LCD display indicates a key and the device emits a sustained pure chord in the key. The user can use the menu item selection device to select another key and the training device then continuously emits the chord in the just scale for that key. The selected key appears in the LCD display. Implementations disclosed include an implementation that employs stored samples of the chords, an implementation in which the chords are generated from waveforms, and an implementation in a portable pocket-sized multimedia asset player.

Abstract: A method for generating an accompaniment for a recorded audio melody includes providing a recorded audio melody that includes segments; performing a frequency analysis of the recorded audio melody; summing the total duration of each fundamental frequency within a segment of the melody; based on the summing, computing a probability for each possible chord for each segment; based on the computed probabilities, selecting a set of chords for the segments; and outputting the set of chords as an accompaniment for the recorded audio melody. Various other methods, devices, systems, etc. are also disclosed.

Abstract: When a first bar-division determination section determines that the bass note changes in a bar or when a second bar-division determination section determines that the degree of change in the chord in the bar is large, a chord-name determination section divides the bar and detects chords. This operation allows correct chords to be detected even when the chord changes within a bar, while the bass note is maintained.

Abstract: A music selecting apparatus and method, which are capable to indicate a music piece matching with the sensitivities of the user. A degree of chord change is stored as data for each of a plurality of music pieces, a sensitivity word for music selection is set in accordance with an input operation, and a music piece having the chord change degree corresponding to the set sensitivity word is detected in accordance with the chord change degree of each of the plurality of music pieces.