JP4675731B2 - Music generator - Google Patents

Description

  The present invention relates to a musical sound generator having an automatic performance function called so-called one-key play.

  Conventionally, an automatic performance function is often added to a musical instrument, and it has been appreciated for listening to music even if it cannot be performed.

  In addition, when using a so-called one-key play function for electronic keyboard instruments, every time a key is pressed (pressed) from the first note of the selected song by pressing (pressing) any key after selecting a song. There is also known one that plays in order for each key). Those having this function have been accepted by those who want to enjoy music.

  This one-key play includes elements of play such as magic, and for those who do not know anything, I think `` this person is so good at playing '' I thought, “Wow?”, And then, “What is it, automatic performance?”

  This process is very meaningful, and when performing a demo performance on the street or playing a musical instrument with friends, at first it is not sure whether the person is playing 100% or automatic performance, It is interesting.

  However, when using the one-key play function, an operation of selecting a song has been indispensable. For example, it is necessary to display the desired song on the panel display after selecting it from over 100 songs, and if you can remember the melody but the song name does not come out, play it. Those who are will be very confused.

  In addition, when using the one-key play function, it is usually not pronounced at the pitch of the keyboard you play [that is, the key press only gives an instruction to start sounding (playing)], and the one-key play function. There was a problem that 100% manual performance could not be performed while in the mode using.

  In other words, both the performer and the surrounding audience would naturally know that it was a one-key play function. Therefore, even if you try to look good as if you are really playing, you will soon be overlooked.

  The present invention was devised in view of the above problems, and it is an object of the present invention to provide a musical sound generator that does not easily know whether it is really playing or whether it uses a semi-automatic performance function. Is.

Therefore, the configuration according to the present invention is as follows.
A performance means for generating performance data;
Musical sound generating means for generating musical sounds according to the key data of the performance data;
Song data storage means for storing a plurality of automatically playable song data;
Selection means for selecting one piece of music data from a plurality of pieces of music data stored in the music data storage means;
In a musical sound generating apparatus having a semi-automatic performance means for reading out the key data of the selected song data different from the key data of the performance data for each performance operation and sending it to the musical sound generation means,
Switching means for switching whether to send the key data of the performance means to the musical sound generating means, or to send the key data of the selected music data read by the semi-automatic performance means to the musical sound generating means ;
Performance information storage means for sequentially storing performance data;
Extracting means for reading out a plurality of continuous performance data from the performance information storage means, comparing the performance data with the music data in the music data storage means, and extracting similar music data;
When similar music data is extracted by the extraction means, it is assumed that the music data is selected by the selection means, and the key data of the selected music data is sent to the tone generation means to the switching means. And a control means for outputting a command for switching in such a manner .
It has the basic feature of having.

  According to the second aspect of the present invention, in the musical tone generator, only the velocity data in the performance data is extracted by the switching means and transferred to the semi-automatic performance means side, and the performance data is converted to the semi-automatic performance by the switching means. When the music data is read out by the semi-automatic performance means and sent to the musical sound generating means when it is switched to the means side and transferred, it is set to be the same as the velocity data of the performance data previously transferred. It is a feature.

Furthermore, in the structure which concerns on Claim 3 , the said musical tone generator has further a display means, The name of the music data extracted by the said extraction means is transferred to the said display means by the selection means, This display means Thus, the name of the song data is displayed.

According to the fourth aspect of the present invention, in the musical tone generator, the extraction means has a function of determining the degree of transposition between the performance data and the song data when extracting the similar song data. When the song data is extracted together with the degree of transposition, the song data read from the song data storage means is transposed by the semi-automatic performance means based on the degree of the transposition, and the musical sound generating means It is characterized by being transferred.

According to the above configuration (particularly, claim 1 ), the performer once starts playing, and the corresponding music is automatically selected during that time, and the automatic music can be performed with the selected music being continued.

According to the second aspect of the present invention, the strength of the sound generated by the performer's performance is inherited as it is when it is in a semi-automatic performance state. It becomes almost indistinguishable.

According to the configuration of the fourth aspect , the key of the performance data read out is based on the transposition between the extracted music data and the performance data in consideration of transposition when collating / extracting similar music data. After transposing the data, the musical sound can be generated by the musical sound generating means.

According to the musical tone generator of claims 1 to 4 of the present invention, a state where a performer once starts playing, a corresponding song is automatically selected during that time, and automatic performance is continued by the selected song. Ri name to allow in, whether they really played, or whether are using a semi-automatic performance function, can achieve an excellent effect that easy to Ru can so that it does not know.

  Needless to say, the above effects can be achieved not only with electronic musical instruments, but also with acoustic instruments, those with automatic performance functions, sound module, and personal computer music software.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a circuit schematic diagram showing a basic circuit of an electronic piano 100 according to the present invention equipped with a semi-automatic performance configuration as a so-called one-key play function.

  As shown in the figure, the electronic piano 100 has a CPU (Central Processing Unit) 110, a ROM (Read Only Memory) 120, a RAM (Random Access Memory) 130, and an automatic performance piece displayed on the system bus. The LCD 141 provided on the front side of the electronic piano 100, which will be described later, and the control panel 151 side are provided with various control states of the electronic piano 100, musical scores displayed in the semi-automatic performance mode, and various virtual types. A display control circuit 140 for controlling the display of the panel display unit 142 to indicate an operation element, and senses a touch on the panel display unit 142 on the control panel 151 by scanning or sets various actual switches and volumes. A panel detection circuit 150 for detecting a state, and a keyboard detection circuit for detecting a key pressing operation of the keyboard 161. 160, an external storage control circuit 180 that controls an external storage device such as a sound source 170 that constitutes a part of a musical tone generator, which will be described later, a flexible disk for reading or writing music data for updating music data, and a hard disk. The external I / O MIDI interface 190 is connected to each other, and various commands and data are transferred to these devices through the system bus.

  On the output side of the sound source 170, a DSP 171 that applies an effect to the output musical sound, a D / A conversion circuit (not shown) that converts the musical sound into analog, an amplifier 172 that amplifies the sound, and an external sound are generated. A sound system such as a speaker 173 is electrically connected.

  The CPU 110 controls each part of the electronic piano 100 according to the present configuration in accordance with a control program stored on the ROM 120, and also includes an automatic performance mode including a one-key play mode for manual input at the start, which is also stored on the ROM 120. Application program, and by executing the program, the music data that is also stored in the ROM 120 and selected music is read out, automatic performance processing is performed, and the RAM 130 is used as a work area as necessary. It is the structure which performs those data processing.

  The ROM 120 is composed of a flash memory, and the ROM 120 includes a control program for the electronic piano 100 and an application program for an automatic performance mode including a one-key play mode for manual input at the start that should be achieved with the present configuration. Is stored. As a song data storage unit to be described later, a plurality of song data selected by a selection unit to be described later are stored together with their names, and various other fixed data used by the CPU 110 are stored.

  The RAM 130 stores status information in the electronic piano 100 and is used as a work area for the CPU 110. Further, as will be described later, when the one-key play mode of manual input at the start of this configuration is executed, key pressing data is transferred from the performance section of the keyboard 161 and used as a performance information storage section described later. Various registers (mode, level, SongNo, transpose registers), flags, and the like for controlling the electronic piano 100 are defined in the RAM 130. The RAM 130 is accessed by the CPU 110 via the system bus. Is done.

  The panel display unit 142 is controlled by the display control circuit 140 to display various switches and switches for mode selection as a two-dimensional screen configuration. Further, when the one-key play mode of semi-automatic performance is selected in the mode selection, the music data to be automatically played, which is further selected by the selection unit described later, is a music data storage (described later) constituted by the ROM 120 in the form of a musical score. Is read out and displayed.

  The LCD 141 serving as a display unit, which will be described later, is also controlled by the display control circuit 140, and when the one-key play mode is executed, the CPU 110 should perform automatically when music data is selected by the selection unit, which will be described later. Along with the reading of the song data, the song name read from the later-described song data storage unit constituted by the ROM 120 is displayed.

  The control panel 151 is equipped with various actual switches and controls such as various switches and volumes displayed on the panel display unit 142, and includes the panel display unit 142. By means of the panel detection circuit 150 interposed between the control panel 151 and the system bus, each switch / volume displayed on the panel display unit 142, the set / reset state of the panel display unit 142, various actual switches and volumes, etc. The state of the operation element is checked, and the panel switch data being turned on, the volume setting state, etc. are detected and sent to the CPU 110.

  The keyboard 161 is composed of a keyboard of the electronic piano 100, and includes a plurality of keys and a keyboard switch that opens and closes in conjunction with key depression and key release and detects a pitch by the key depression. Further, these keyboards 161 are provided with touch sensors (not shown) for detecting the key pressing speed at the time of key pressing composed of a switch between two points set in the keyboard moving direction at the time of key pressing. The keyboard 161 and the keyboard detection circuit 160 interposed between the touch sensor and the system bus check the state of the keyboard switch, and from the signal indicating ON / OFF of the key pressing timing data including ON or OFF information and the key number thereof. Key data is generated, and velocity data proportional to the keystroke strength is generated from the detection signal of the touch sensor. The key pressing timing data (ON / OFF information), key number key data, and velocity data are sent as key pressing data to the CPU 110 via the system bus.

  The tone generator 170, which is a part of the configuration of the musical tone generator described later, is provided with a waveform memory (not shown) and a waveform data reading circuit (not shown). When the key depression data is sent from the CPU 110, the music data is read while reading the waveform data stored in the waveform memory according to the read address instructed from the CPU 110 (reading from the address). Or it is the structure which generates the musical tone according to key press data.

  The output musical sound data is added with an arbitrary effect by an effect adding circuit constituted by the DSP 171, further converted into an analog signal by a D / A conversion circuit (not shown), and further an amplifier 172 and a speaker 173 constituting the sound system. Is amplified and output to the outside as a musical sound.

  As described above, the external storage control circuit 180 is provided for reading or writing song data for updating song data, and an external storage device such as a flexible disk drive or a hard disk installed in the electronic piano 100 is provided. This is a configuration for controlling the storage device.

  The MIDI interface 190 is an interface through which control signals and musical score data used in the electronic piano 100 and the external device are transferred between the external device and the external device.

  FIG. 2 is configured by executing the automatic performance mode application program stored in the ROM 120 in the electronic piano 100 of the above circuit and setting the mode to the one-key play mode of manual input at the start. FIG. 2 is a functional block diagram of an automatic performance configuration according to the first embodiment of the present invention.

  As shown in the figure, this configuration has a performance unit 10, a musical sound generation unit 11, a song data storage unit 12, a selection unit 13, a semi-automatic performance unit 14, a switching unit 15, and a performance information storage unit 16. And an extraction unit 17, a control unit 18, and a display unit 19.

  The performance unit 10 includes the keyboard 161 and a key detection circuit 160, and generates key press data including at least the key press timing data (ON / OFF information), key number key data, and velocity data. It is the structure to do.

  The musical sound generator 11 includes a sound source 170, a DSP 171, a D / A conversion circuit, an amplifier 172, and a speaker 173, and generates musical sounds according to key pressing data or key data of music data.

  The song data storage unit 12 is basically composed of a flash memory ROM 120, and can store a plurality of song data that can be automatically played. In this embodiment, the external storage control circuit 180 can read music data that can be automatically played from the outside instead of the ROM 120, and the circuit 170 functions as the music data storage unit 12. There is also.

  The selection unit 13 includes the panel display unit 142, the panel detection circuit 150, and the CPU 110. One of a plurality of song data stored in the song data storage unit 12 is detected from detection of a panel touch by the performer. Select one song data.

  The semi-automatic performance unit 14 is composed of the CPU 110, and each time the key depression timing data is received from the performance unit 10 and the key is depressed, the key data of the selected song data which is different from the key data of the key depression data. Is read from the music data storage unit 12 and sent to the musical sound generation unit 11 via the switching unit 15.

The switching unit 15 is also composed of the CPU 110, and sends the key data of the performance data of the performance unit 10 to the musical sound generation unit 11 side, or sends the key data of the music data of the semi-automatic performance unit 14 to the musical sound generation unit 11. It is the structure which switches whether it sends to according to the switching command of the control part 18. FIG.

  As will be described later, in this configuration, when the switching unit 15 is switched to transfer the song data from the semi-automatic performance unit 14 side to the musical sound generation unit 11, it is read out by the semi-automatic performance unit 14 to generate a musical sound. With respect to the music data sent to the section 11, the switching section 15 extracts the velocity data in the performance data and sets the velocity data to that of the music data.

  The performance information storage unit 16 is composed of the RAM 130 and stores key press data in sequence.

  The extraction unit 17 is constituted by the CPU 110, reads a plurality of consecutive key press data from the performance information storage unit 16, collates the key press data with the song data in the song data storage unit 12, This is a configuration for extracting similar music data.

  That is, basically, the key data in both data is compared, and the degree of similarity of the music data is quantified according to the degree of coincidence of the key data. It is determined that it is similar to the key pressing data and is extracted.

  Further, not only key data but also time data of key pressing timing is used for comparison. At this time, since the tempo of the performer is different from the tempo of the original music, it is preferable to use the time ratio between the key presses.

  In the middle of this determination, the song data candidates in the song data storage unit 12 are narrowed down, but the candidates are gradually narrowed down as the key depression data is input.

  In addition, a gate time measured from a time when an arbitrary key is turned ON by key ON / OFF in the key pressing data may be included in the comparison target.

  Further, in this embodiment, the extraction unit 17 has a function of determining the degree of transposition between key press data and music data when extracting similar music data. Even if the key data is different, if the same song is transposed if it is transposed, it may be judged that it is different. It is determined that the song is

  More specifically, for calculating the similarity of songs, for example, the relative pitch from the initial sound is t, and the average deviation equation such as Equation 1 described later is obtained, or the standard deviation equation such as Equation 2 is used. By calculating the degree of similarity of the music data, it is determined that the key depression data and the music data are similar if the music data is above a certain threshold. Therefore, even if the transpose (transpose) is different and the initial sound is different, the subsequent sample sound is regarded as a relative pitch, so the similarity can be easily determined by the above formula and determined to be similar. If it is a song that has been played, the difference in the first sound may be judged as the amount of transposition. In addition, in the similarity determination, without comparing the above-mentioned calculations, the shapes of the scale transitions are compared in the form of an envelope, and the degree of music data is determined according to the degree of coincidence of the shapes. You may make it judge whether it is similar.

  At the time of the similarity determination, the relative pitch from the initial sound is set to t, so the degree of transposition is determined. Based on the degree of transposition, the semi-automatic performance unit 14 reads the song data from the song data storage unit 12. The music data to be read is transposed and transferred to the tone generator 11.

The control unit 18 is also composed of the CPU 110. When similar music data is extracted by the extraction unit 17, the music data is selected by the selection unit 13, and the switching unit 18 15 is configured to output a control command for switching to send the key data of the selected music data to the musical tone generating means .

  Further, the selection unit 13 sends to the semi-automatic performance unit 14 the sound generation instruction information (information notifying the sound generation timing) sent from the control unit 18 and instructs the music data storage unit 12 to read out which musical note of the selected music data. To do.

  The display unit 19 is composed of the display control circuit 140 and the LCD 141, and the name of the song data extracted by the extraction unit 17 is transferred by the selection unit 13, and the name of the song data is displayed. It is.

  FIG. 3 is a flowchart showing a main routine in the CPU 110 of the electronic piano 100.

  In the figure, when the power is turned on, initialization processing of the electronic piano 100 is performed (step S100). In other words, the mode, level, SongNo, and transpose registers set in the CPU 110 are set to mode = normal, level = Unknown, SongNo = 0, and transpose = 0, respectively, and the memory of the performance information storage unit 16 is cleared. The In other cases, the normal initialization process of the electronic piano 100 is performed.

  Next, panel detection processing by the panel detection circuit 160 is performed (step S102). That is, detection of panel events such as switches and volumes of the control panel including panel touch of the panel display unit 142, and detection of MIDI in panel events such as control change and program change are performed.

  Further, key detection sound generation processing such as a key event by pressing the keyboard 161 and a key event by MIDIin is performed (step S104). This process will be described with reference to FIG.

  Thereafter, display processing by the LCD 141 is performed (step S106).

  Further, MIDI data processing is performed (step S108). At this time, the MIDIin data is classified into a panel event and a key event.

  When the music data needs to be updated, the music data necessary for the external storage device is read and written (step S110).

  FIG. 4 is a flowchart showing the processing routine of the key detection sound generation process in step S104 of FIG.

  As shown in the figure, first, the mode register is checked (step S200), and if it is normal (step S200; Y), it is a normal performance, so the process proceeds to step S212.

  On the contrary, if it is not normal (step S200; N), it is a so-called one-key play mode.

  In this mode, a level check is first performed (step S202). This level indicates whether or not the result of collation of the music data has been extracted and confirmed. Therefore, if it is uncertain (step S202; Y), it becomes Unknown and the process proceeds to step S210. That is, in step S210, a mode switch for music data collation processing described later (an appropriate switch on the panel is operated, or one or more of the three pedals of the electronic piano 100 are operated) is turned on. It is checked whether or not it exists.

  If the switch is not ON (step S210; N), the process jumps to the music data collation process in step S214.

  On the other hand, if the switch is ON (step S210; Y), the data stored in the performance information storage unit 16 is reset, and the similarity P described later is reset (step S212). Move to data collation processing routine.

  If the result of collation of the music data is confirmed by the level check in step S202 (step S202; N), it becomes SongSelected, and then it is determined whether it is a key-on event or a key-off event (step S204).

  If the event is a key-off event (step S204; N), the mute process (step S218) is performed, and the process of this routine ends.

  On the other hand, if it is a key-on event (step S204; Y), the key data addressed in the confirmed song data is read (step S206).

  Further, a transpose value indicating the degree of transposition is added to the read key data to produce a sound (step S208). At that time, the velocity data used in the key pressing data at the time of key detection processing (regardless of Unknown / SongSelected) is used.

  FIG. 5 is a flowchart showing a processing routine of the music data collating process shown in step S214 of FIG.

  As shown in the figure, first, key data of key depression data is stored in the performance information storage unit 16 (step S300). That is, each key number, step time, and velocity data are stored when the key is turned on, and the gate time is added to the area where the corresponding key number is stored when the key is turned off.

  Next, it is checked whether or not key data of three notes or more is stored in the performance information storage unit 16 (step S302). When there is only one key data for a note, there is a transpose, so it is impossible to collate at all.

  If there is key data for two notes, collation is possible, but as will be described later, in order to determine the similarity between key data and song data, three or more people (the number of sampled sounds is large). As the number of songs increases, the number of songs with a high similarity value decreases and it becomes easier to narrow down; conversely, the similarity decreases as the number of sample sounds decreases.) Decided to do. Rather, the degree of similarity increases as the number of sample sounds decreases, and many songs having a high degree of similarity are selected. Therefore, it is checked whether key data of three notes or more has been stored. Therefore, if key data for three notes or more is not stored (step S302; N), the music data collation process ends there.

  If key data of three notes or more are stored (step S302; Y), the music data stored in the music data storage unit 12 is sequentially checked from the beginning, and the similarity is 0.00 to Determination is made within a range of 0.99 (step S304). At this time, the degree of similarity of the music data is calculated by calculating the similarity of music by an average deviation formula such as Equation 1 described later or by a standard deviation equation such as Equation 2. If the value is equal to or greater than a certain threshold value (a value determined by the number of sample sounds as will be described later in this embodiment), the key depression data and the song data are “determined” as matching.

  The calculation for calculating the similarity is, for example, calculated by the following formula 1 (average deviation) or formula 2 (standard deviation) where t is the relative pitch from the initial sound. According to Equation 2, a big mistake can be seen sweetly or strictly. Also, the octave difference can be ignored using a 12 mod function. Actually, it is excluded after calculating separately the overplaying (such as “the wrong key was pressed the wrong key”) and not playing (the “missing one note”) separately. It is better to apply the following formula 1 or 2 to the data.

(Equation 1)
Similarity p = 1−f (Σ | t [i] −t0 [i] |) / n
i: Number of the sound string to be evaluated (initial sound i = 0, not included in calculation)
t [i]: Relative pitch of the played i-th sound with respect to the played first tone t0 [i]: Relative pitch of the previously stored i-th sound with respect to the previously stored first tone n: Initial tone i = 0 Excludes the number of notes played so far

(Equation 2)
Similarity p = 1−f (Σ (t [i] −t0 [i]) ² ) / n ²

  When such a calculation process is performed, up to several notes, songs with similar beginnings are displayed as songs with high similarity. That is, the similarity tends to increase as the number of sample sounds decreases, so 0.9 if the sample number is 3, 0.85 if the sample number is 4, and 5 sample number. If the number of sounds is 0.83, if the number of sample sounds is six, 0.81, and if the number of sample sounds is seven, the level for determining the match is changed according to the number of sounds, such as 0.79. Like that. If the number of sample sounds is 4 and there are a plurality of samples having a similarity of 0.85 or more, the one with the highest similarity is displayed (in the order of increasing the number of similarities when displaying a plurality). Become.

  That is, at the stage where the similarity is calculated, the song name of the song data having a high similarity is displayed on the panel display unit 142 (step S306).

  As described above, when the number of sample sounds is small, the degree of similarity is set higher. However, the song name display on the panel display unit 142 displays a plurality of songs in descending order of the degree of similarity (if the number of sample sounds is four). If the similarity is lower than 0.85 and a certain value or more is listed as a candidate) and before confirmation, it is preferable that the user can manually select by a specific switch or foot switch on the panel.

  However, in this embodiment, if the total number search is always performed on the song data stored in the song data storage unit 12, the processing becomes heavy according to the progress of the song, so that all songs are initially candidates and the similarity is low. It is advisable to set a flag for a value (for example, 0.50 or less) so that similarity determination is not made thereafter. If the similarity does not reach the above value even if the number of notes exceeds 16, the search routine is processed using only the last 12 notes played (that is, the middle of the song can also be searched). )

  Then, it is checked whether or not the similarity is equal to or higher than a predetermined numerical value (assuming that if the number of sampled sounds is four, it is 0.85 or higher) (step S308).

  If the degree of similarity is equal to or greater than (a value determined by the number of sample sounds) (step S308; Y), the key depression data and the song data are treated as matching, and the level register is set to SongSelected (step S310), the character of “confirmed” is displayed on the panel display unit 142 (step S312). The music title is displayed on the LCD 141 on the front surface of the electronic piano 100.

  On the other hand, if the similarity is less than (a value determined by the number of sample sounds) (step S308; Y), the key depression data and the song data do not coincide with each other, but the candidates are closer. The characters “promising” are displayed on the panel display unit 142 (step S314).

  The “promising” may be “undecided”. Further, it is more effective if the similarity value is not simply set to a value (determined by the number of sample sounds) but is increased according to the user's proficiency level.

  According to the configuration of the present embodiment described above, once the performer starts playing on the keyboard 161 of the performance unit 10 (at first, a musical tone by the key depression is output), and during that time, the extraction unit 17 automatically Is extracted from the song data storage unit 12, and the semi-automatic performance unit 14 can continue the automatic performance. Therefore, if the performer performs only at the beginning of the song, semi-automatic performance, that is, one-key play performance is possible thereafter.

  Also, when the musical tone velocity data output by the performer's key depression is in a semi-automatic performance state, it is transferred to the musical tone generation unit 11 by the switching unit 15 and taken over as it is. It becomes almost indistinguishable whether it is performed by one key play performance.

  Further, the extraction unit 17 considers the degree of transposition when collating / extracting similar music data, and the read music data is read based on the transposition between the extracted music data and key depression data. After the key data of the data is transposed by the semi-automatic performance unit 14, the tone generation unit 11 can generate a tone.

  FIG. 6 shows a configuration of an embodiment according to claim 1 of the present invention, which is different from the configuration of the first embodiment of FIG. In the configuration of the first embodiment, the key pressing data in the performance unit 10 and the music data in the semi-automatic performance unit 14 are transferred to the key pressing data by switching the switching unit 15 based on the switching command output from the control unit 18. On the other hand, in the configuration of the second embodiment, the switching command from the switching unit 15 is output to the performance unit 10 and the selection unit 13 to generate a key depression. Generation of musical sound based on data (transfer of key pressing data from the performance section 10 to the musical sound generation section 11) to one-key play performance by the semi-automatic performance section 14 (transfer of song data from the semi-automatic performance section 14 to the musical sound generation section 11) Can be switched to.

  It should be noted that the musical tone generator of the present invention is not limited to the illustrated example described above, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  The musical sound generating apparatus of the present invention can be applied not only to an electronic musical instrument, but also to an acoustic musical instrument, an instrument with an automatic performance function, a sound module, and personal computer music software.

It is a circuit schematic diagram which shows the basic circuit of the electronic piano 100 which concerns on this invention equipped with what is called a one key play function. 3 is a functional block diagram of an automatic performance configuration according to Embodiment 1. FIG. 3 is a flowchart showing a main routine in a CPU 110 of the electronic piano 100. It is a flowchart which shows the processing routine of the key detection sound generation process of step S104. It is a flowchart which shows the process routine of the music data collation process shown to step S210. It is a functional block diagram of the automatic performance structure which concerns on Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Performance part 11 Music sound generation part 12 Music data storage part 13 Selection part 14 Semi-automatic performance part 15 Switching part 16 Performance information storage part 17 Extraction part 18 Control part 19 Display part 100 Electronic piano 110 CPU
120 ROM
130 RAM
140 Display control circuit 141 LCD
142 Panel Display Unit 150 Panel Detection Circuit 151 Control Panel 160 Key Detection Circuit 161 Keyboard 170 Sound Source 171 DSP
172 Amplifier 173 Speaker 180 External storage control circuit 190 MIDI interface

Claims (4)

A performance means for generating performance data;
Musical sound generating means for generating musical sounds according to the key data of the performance data;
Song data storage means for storing a plurality of automatically playable song data;
Selection means for selecting one piece of music data from a plurality of pieces of music data stored in the music data storage means;
In a musical sound generating apparatus having a semi-automatic performance means for reading out the key data of the selected song data different from the key data of the performance data for each performance operation and sending it to the musical sound generation means,
Switching means for switching whether to send the key data of the performance means to the musical sound generating means, or to send the key data of the selected music data read by the semi-automatic performance means to the musical sound generating means ;
Performance information storage means for sequentially storing performance data;
Extracting means for reading out a plurality of continuous performance data from the performance information storage means, comparing the performance data with the music data in the music data storage means, and extracting similar music data;
When similar music data is extracted by the extraction means, it is assumed that the music data is selected by the selection means, and the key data of the selected music data is sent to the tone generation means to the switching means. And a control means for outputting a command for switching in such a manner .   In the above tone generator, only the velocity data in the performance data is extracted by the switching means and transferred to the semi-automatic performance means, and the performance data is switched and transferred to the semi-automatic performance means by the switching means. 2. The music data read out by the semi-automatic performance means and sent to the musical sound generation means at the same time is set to be the same as the velocity data of the performance data previously transferred. Music generator. The musical tone generator further includes display means, and the name of the song data extracted by the extraction means is transferred to the display means by the selection means, and the name of the song data is displayed by the display means. The musical tone generator according to claim 1 or 2 , characterized in that In the above musical tone generator, the extraction means has a function of determining the degree of transposition between performance data and song data when extracting similar song data. When the determination is made, the music data read from the music data storage means is transposed by the semi-automatic performance means based on the degree of transposition, and transferred to the musical sound generation means. The musical tone generator according to any one of claims 1 to 3 .

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