JP2654727C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an automatic musical performance apparatus for an electronic musical instrument that performs an automatic performance based on programmed automatic performance musical score data. 2. Description of the Related Art Generally, an electronic keyboard (such as an electronic piano) has an automatic accompaniment function such as an automatic accompaniment of a rhythm and an automatic accompaniment of a chord and a bass. And one for each of the keys
A function (so-called one-finger ad-lib play) is provided in which phrases different in length of a bar are assigned, these phrases are selectively called by a single finger key operation, and an ad-lib performance effect is obtained by combining a series of phrases. Electronic musical instruments are also known. There is also known an electronic musical instrument having a function of generating an automatic accompaniment sound in parallel with the above-mentioned ad-lib phrase play. [0003] The automatic accompaniment in the conventional automatic performance device progresses at a predetermined tempo irrespective of the key operation, and an ad-lib phrase is played at the moment when the key operation is performed. It reads phrase data. For this reason, when performing an ad-lib phrase performance for the automatic accompaniment progressing at the predetermined tempo, it is necessary to precisely match the timing of performing the key operation with the timing of the automatic accompaniment. However, since beginners, especially infants, do not have a sense of rhythm, the timing of the key operation of the ad-lib phrase play may be shifted with respect to the automatic accompaniment. For this reason, there has been a problem that a melody tone shifted from the automatic accompaniment is generated. [0004] In view of this problem, an object of the present invention is to enable even a beginner to obtain a melody pronunciation that matches the timing of automatic accompaniment. [0005] An automatic performance device according to the present invention includes an automatic performance device comprising key information detection means for scanning a plurality of keys to detect key-on or key-off, and melody data and accompaniment data. Musical note data storage means storing the musical note data string of the musical note, and the melody data and the accompaniment data from the musical note data storage means are sequentially and synchronously synchronized in accordance with a predetermined tempo.
Selection and notation data reading means, and the accompaniment data supply means for supplying a constantly tone generating means accompaniment data read out by the notation data reading means, the melody data read by the notation data reading means for reading Te Melody data supplying means for supplying the melody data supplying means to the musical tone generating means, wherein the melody data supplying means reads the melody read by the musical score data reading means when the key information detecting means detects a key-on. the data is supplied to the musical tone generating means, the upper
When key-off information is detected by the key-writing information detecting means, the above-mentioned musical score data is read out.
Supply of the melody data read by the synthesizing means to the tone generating means.
By stopping immediately, even if the timing of pressing the key is out of sync, the melody
So that the timing of sounding the data does not deviate from the timing of sounding the accompaniment data.
It is characterized in the thing. Since the present invention has the above technical means, the melody data 22 and the accompaniment data 23 are always read from the storage means (ROM 14) at the same tempo. While the key is being pressed, the melody data supply means (gate means 25) outputs the melody data 22.
Is supplied together with the accompaniment data 23 to generate a tone together with the accompaniment data. When the key is turned off, the melody data supply means does not immediately supply the melody data read from the storage means to the tone generating means, and the melody data is read from the storage means. Nevertheless, at the same time as key-off detection
The melody performance sound will not be pronounced. By generating and interrupting the melody data in this manner, even if the timing of pressing the key is shifted, there is no inconvenience that the timing of generating the melody data is shifted from the timing of generating the accompaniment data. FIG. 1 is a block diagram of a main part of an electronic musical instrument showing an embodiment of the present invention. The electronic musical instrument includes a keyboard 11, and operation information of the keyboard 11 is detected by a key switch circuit 15 and provided to a sound source circuit 13. The tone generator 13 is composed of a CPU, reads out waveform data from the ROM 14 based on key information of keyboard operation, modulates its envelope and amplitude, and supplies it as a tone signal to the speaker 16 via the amplifier 15. The ROM 14 stores music data (musical data for pronunciation) for automatic performance and a program for pronunciation processing. FIG. 2 shows a functional block diagram of the electronic musical instrument of the present invention. The music data 21 stored in the ROM 14 of FIG. 1 includes melody data 22 and accompaniment data 23. The accompaniment data 23 is read from the ROM 14 at a predetermined tempo and supplied to the tone generator 13. The melody data is supplied to the tone generator circuit 13 via the gate means 25. The gate means 25 is opened when the key scanning means 24 detects that any key of the keyboard 11 is turned on, and transmits the melody data to the tone generator circuit 13. Gate means 25
Is closed by turning off the key, preventing the transmission of melody data. FIGS. 3 to 5 show the flow of data processing in the tone generator circuit 13 (CPU), and FIG. 6 shows the structure of music data. As shown in FIG. 6, the music data 21 is an array of musical score data in which one sound is composed of four bytes of a key number, a step time, a gate time, and a velocity. The key number indicates the pronunciation of the sound, the step time indicates the timing of the sound, the gate time indicates the time width of the sound, and the velocity indicates the volume of the sound. In addition, although not shown, timbre data and repetition symbols of musical note patterns are included in the music data. FIG. 3 shows a main routine. First, in step 31, a key scan is performed to detect a keyboard operation. Next, in step 32, a panel scan is performed to detect an operation of a panel switch. Next, a processing step 33 for automatic performance is performed, and a loop is made to step 31. FIG. 4 shows an automatic accompaniment process in step 33 of the automatic performance shown in FIG. First, it is checked in step 41 whether the step time of the first sound has reached the count value of the time axis counter, and if yes, the note data (4 bytes) of the first sound of the accompaniment data 23 is read from the ROM 14, At step 43, a sound generation process is performed. Next, at step 44, the address is advanced by 4 bytes, and at step 45, the step time data of the note to be sounded next is set. Thereafter, the flow returns to step 41 to repeat the above processing. FIG. 5 shows melody performance processing in step 33 of the automatic performance of FIG. First, it is checked in step 51 whether or not the step time of the first sound has reached the count value of the time axis counter, and when it has reached, the note data of the first sound of the melody data 22 is read from the ROM 14 (4 bytes). . Next, whether a key-on event or a key-off event is determined is performed in steps 53 and 54. If the key is on, a sound generation process is performed in step 55, and if the key is off, a mute process is performed in step 65. When these processes are completed or when neither key-on nor key-off is performed, the process proceeds to step 57, where the address is advanced by 4 bytes, and step 58 sets the step time data of the next note to be pronounced. Thereafter, the flow returns to step 51, and the above processing is repeated. Therefore, when the key is turned on, a melody note having step time data immediately after the key is turned on, and while the key is pressed, the melody note is sequentially generated. When the key is turned off, the melody is interrupted. If no key is depressed, note data is read from the ROM, but no sound generation processing is performed because the gate is closed. On the other hand, as shown in FIG. 4, the accompaniment pronunciation proceeds irrespective of the key operation. Melody data 2
2 and the accompaniment data 23 are read from the ROM 14 at the same tempo. Therefore, even if the timing of pressing the key is shifted, the timing of generating the melody data is not shifted from the timing of generating the accompaniment data. As described above, a beginner, particularly a baby, can operate the keys while listening to the automatic accompaniment sound to cause the melody to sound. Even if the key operation timing is slightly shifted, the melody and the accompaniment are always synchronized, so that an unnatural music is not played. The operation is easy for infants, and the rhythm is naturally cultivated while being treated like a toy. According to the present invention, as described above, the melody data and the accompaniment data are continuously read from the storage means at the same tempo, and the melody data supply means is provided while the key is pressed. Supplies the melody data together with the accompaniment data to the musical sound generating means, and produces the melody data and the accompaniment data together while the key is pressed. The melody data supply means does not supply the melody data read from the storage means to the musical sound generation means at the moment when the key is turned off, so that the melody data is read from the storage means. Is interrupted so that the melody data is not pronounced even though As described above, the melody data is sounded or interrupted. Therefore, even if the key is depressed at a wrong timing, the melody data is generated at a timing that is different from that of the accompaniment data. It is possible to prevent the inconvenience of deviation from occurring. This makes it possible to prevent the music from being played unnaturally even if the key is pressed at the wrong time.
As soon as the key is turned off, the melody is pronounced
Since it can be stopped , the user (player) can be made to feel as if he or she is playing the melody by himself. Also, because the operation is extremely easy,
It is possible to provide an automatic performance device that can be easily handled even by an infant and can naturally feed a rhythmic feeling while treating the infant like a toy.

[Brief description of the drawings]     FIG.   It is a block diagram of an electronic musical instrument showing one embodiment of the automatic performance device of the present invention.     FIG. 2   FIG. 3 is a block diagram showing functional features of the automatic performance device of the present invention.     FIG. 3   It is a flowchart which shows control of an automatic performance.     FIG. 4   It is a flowchart which shows control of an automatic performance.     FIG. 5   It is a flowchart which shows control of an automatic performance.     FIG. 6   It is a figure showing the structure of note data of automatic performance.     [Explanation of symbols]   11 keys   12 Key switch circuit   13 sound source circuit   14 ROM   15 amplifier   16 speakers   22 Melody data   23 Accompaniment data   24 key scanning means   25 Gate means

Claims (1)

Claims: 1. Key information detecting means for scanning a plurality of keys to detect a key-on or a key-off, and musical-speech data storing a musical-speech data string of an automatic performance composed of melody data and accompaniment data. Storage means; musical note data reading means for sequentially and synchronously reading the melody data and the accompaniment data from the musical note data storing means in accordance with a predetermined tempo; and accompaniment data read by the musical note data reading means. Accompaniment data supply means for steadily supplying the melody data read out by the musical note data reading means to the tone generation means. A supply unit that, when a key-on is detected by the key information detection unit, the musical score data reading unit; Therefore, the melody data that has been read is supplied to the musical sound generating means, and a key-off is detected by the key information detecting means.
Sometimes, the melody data read by the musical score data reading means is
By immediately stopping the supply to the musical tone generating means, even if the timing of pressing the key deviates, the timing of generating the melody data
The automatic performance device is characterized in that the sound is not shifted with respect to the sounding timing of the accompaniment data .