JP2537963B2 - Automatic playing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic musical instrument of an electronic musical instrument.

2. Description of the Related Art In recent years, electronic organs and electronic keyboards are equipped with an automatic performance function that automatically outputs all or part of the melody, accompaniment and rhythm. Also, as a single function for only rhythm output, a so-called rhythm box dedicated to drum percussion has been developed (for example, Japanese Patent Laid-Open No. 56-66897).

The above-mentioned automatic musical instrument will be described below with reference to the drawings.

FIG. 3 shows the structure of a conventional automatic performance device.

In FIG. 3, 101 is a tempo adjustment input unit, 102 is a tempo control unit, 103 is a clock generation unit, 104 is a musical tone information memory, 105 is a musical tone generation unit, and 106 is a generation / stop instruction unit.

The operation of the automatic performance device configured as described above will be described below.

The tempo adjustment input unit 101 outputs a tempo count value corresponding to an input instructed by a tempo adjustment switch such as a slide volume in order to adjust the tempo of the output automatic performance. That is, particularly when the current tempo count value is A, particularly when the tempo is instructed to be half speed by the tempo adjustment instruction input, a value twice as large as A is output as a new tempo count value.

Assuming that the tempo count value is X and the speed corresponding to the tempo adjustment instruction input is Y, the relationship between X and Y is expressed by equation (1).

Here, W is a predetermined constant.

The tempo control unit 102 counts the clocks output from the clock generation unit 103, and the count result is the tempo adjustment input unit.
When it becomes equal to the tempo count value input from 101, the clock count value is reset to 0 and the address output to the tone information memory 104 is incremented. If the clock count value and the tempo count value are not equal, the tempo control unit 102
Repeats the above-mentioned operation, but when the stop instruction is issued to the generation / stop instruction unit 106 and the stop instruction signal is output from the generation / stop instruction unit 106, the clock counting operation is stopped and the clock count value is stopped. And the address are reset together.

It is assumed that the tone information memory 104 stores tone information relating to the tone to be output. Here, with regard to the musical tone information, it is assumed that the information on the start, the continuation, and the stop of the generation is expressed by one word, and the information on the start of the generation also includes the information on the tone color, the volume, and the pitch. It shall be included. Each piece of such information corresponds to the minimum unit of the musical note expression for automatic performance.
It is assumed that they are sequentially stored in 4.

The musical tone generating section 105 outputs a musical tone according to the musical tone information output from the musical tone information memory 104 corresponding to the address output from the tempo control section 102.

After performing the tempo adjustment by the above operation, the generation / stop instructing unit 106 temporarily stops the operation, and then the generation / stop instruction unit 106 is used to start the generation at the timing to be output.

SUMMARY OF THE INVENTION However, in the above-mentioned configuration, when the tempo is changed during the automatic calculation, it is difficult to set the delicate tempo change desired by the user at the time of the change. was there.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an automatic performance device capable of easily and naturally setting a subtle tempo change during automatic performance.

Means for Solving the Problems In order to achieve this object, an automatic performance device of the present invention has a time interval having a time length of an integer M times which arbitrarily changes with respect to a predetermined note length (K beat). The tempo input section that generates the timing signal corresponding to the tempo instruction input, the clock generation section that generates the clock, and the result of counting the time interval between the timing signals by the clock correspond to K _X M beats. The tempo calculation unit that calculates and outputs the tempo count value that is the reference for the tempo control as the clock count value to be generated, and the musical tone information is output each time the tempo count value output from the tempo calculation unit and the count result of the clock become equal. A tempo control unit that outputs a signal for updating,
And a performance output unit for sequentially outputting performances according to a signal for updating the musical tone information.

With this configuration, even if the operator of the automatic performance device does not know the melody of the musical composition in advance, he / she rides on a so-called tempo and gives a timing of an arbitrary tempo about M times the predetermined note length (K beat). Is input, the tempo input section outputs a timing signal corresponding to the input, and the tempo calculation section counts the time interval of the timing signal with a clock. In addition, the tempo calculator calculates the clock count value as K _X M
The tempo control value is calculated and output as a beat, and the tempo control unit adjusts the tempo according to the tempo count value output from the tempo calculation unit. The automatic performance sound will be output.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an automatic musical instrument according to an embodiment of the present invention.

In FIG. 1, 1 is a tempo input section, 2 is a tempo calculation section, and 5 is a performance output section. In addition, 102 is a tempo control unit, 103 is a clock generation unit, 104 is a musical tone information memory, and 105
Is a tone generation unit, and 106 is a generation / stop instruction unit, which have the same configuration as the conventional example.

When the note length (K beats) for instructing a predetermined tempo is set in units of 1 beat, first, the tempo input unit 1 is input at a timing of an arbitrary approximate integer M times the tempo. The tempo input section 1 sequentially outputs a timing signal at a timing corresponding to each input.

The tempo calculation unit 2 starts counting the clocks input from the clock generation unit 103 when the i-th timing signal is input from the tempo input unit 1 and receives the (i + 1) th timing signal when input. Clock count result N
_While holding _{i, i + 1} , counting of the clock for the (i + 1) th timing signal is started.

On the other hand, the tempo calculator 2 executes the tempo count value calculation. That is, a new tempo count value is calculated from the clock count result N _{i, i + 1} and the immediately preceding tempo count value L _j−1.
L _j is calculated by the equation (2). That is, since the code length (K beat) for instructing the tempo is 1 beat here, the time length of 1 beat before the tempo change is defined by the tempo count value L _j-1 . Therefore, the number of beats of the clock count result N _{i, i + 1} is calculated as m by the first calculation formula (2). Next, m is calculated by using a third arithmetic expression as to how many integer beats it corresponds to, and a tempo count value L _j to be newly set is calculated by the second equation.

However, [] indicates rounding.

Here, l is the minimum unit of the note expression for automatic performance described in the conventional example, and when the tempo is given in units of 1 beat, the minimum unit is 16th note l = 4. Also, M is a positive integer, and represents the approximate number of beats between the i-th (i + 1) -th timing signal.

When the tempo count value L _j is input from the tempo calculation unit 2, the tempo control unit 102 changes the clock count value for automatic performance to a value corresponding to the tempo count value L _j-1 being used for tempo control. Gradually, set the tempo count value used for tempo control to L _j
To the clock generator 10 as in the conventional example.
Since the automatic performance is continued while counting the clocks from 3, the performance output section 5 newly outputs the automatic performance of the tempo corresponding to the tempo count value L _j .

The tempo calculator 2 repeats the above operation. Further, when T is finally a time interval corresponding to one tempo beat, n is expressed as a formula (3) with a clock time interval.

T = L · N · l (3) The relationship between the above signals is shown in FIG.

It should be noted that the tempo control unit 102 instructed to start and stop the operation by the generation / stop instruction unit 106 as described above is finally validly input regardless of whether or not the automatic performance is being performed. Since the tempo control is performed based on the tempo count value L, the tempo can be input at an arbitrary time point before the start of the automatic performance or during the performance.

As described above, according to the present embodiment, it is possible to calculate and determine a new tempo count value by performing the tempo input to the tempo input unit 1 once every arbitrary M beats. The tempo can be adjusted simply by inputting the timing for each beat.

In the present embodiment, M is a positive integer,
By modifying the equation (2), it is possible to input the tempo at the timing of eighth notes, sixteenth notes, or the like.

Effect of the Invention According to the present invention, even if the operator of the automatic performance device does not know the melody of the musical composition, he / she rides at a so-called tempo and beats at a timing approximately arbitrary M times the predetermined note length (K beat). For example, if the note length is set to 1 beat in advance, the tempo can be set only by inputting the timing of the desired tempo setting instruction for every 4 beats (every bar for 4 beats). It is not necessary to input every 4 beats, 4,
The desired tempo can be adjusted while inputting at the point of time when an arbitrary approximate M beats have elapsed during the performance of a few beats.

[Brief description of drawings]

FIG. 1 is a block diagram of an automatic performance device according to an embodiment of the present invention, FIG. 2 is an exemplary relationship diagram of data according to an embodiment of the present invention, and FIG. 3 is a block diagram of a conventional automatic performance device. is there. 1 ... tempo input section, 2 ... tempo calculation section, 5 ... performance output section, 102 ... tempo control section, 103 ... clock generation section, 106 ... generation / stop instruction section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Nakanishi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Yuko Shinada 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-59-99493 (JP, A) JP-A-59-58486 (JP, A)

Claims (1)

(57) [Claims] 1. A tempo input unit for generating a timing signal corresponding to a tempo instruction input which is input at a time interval having an integer M times time length which arbitrarily changes with respect to a predetermined note length (K beat). A clock generation unit that generates a clock; a tempo calculation unit that calculates and outputs a tempo count value that is a reference for tempo control from the result of counting the time interval between the timing signals by the clock; A tempo control unit that outputs a signal for updating musical tone information each time the output tempo count value and the count result of the clock become equal, and a performance output that sequentially outputs performances in accordance with the signal for updating the musical tone information. An automatic performance device, wherein the tempo calculator calculates the tempo count value by regarding the timing signals as K _X M beats. .