JPH0654435B2 - Automatic rhythm tempo control device - Google Patents

Description

Description: (1) Technical Field of the Invention The present invention relates to an automatic rhythm tempo control device capable of selecting each kind of rhythm tempo while displaying it only by a simple switch operation.

(2) Conventional technology and problems In the conventional automatic rhythm tempo control device, when setting the rhythm tempo, manually operate the volume while watching the display device such as the tempo lamp showing the speed of the rhythm before starting the performance. The tempo of the desired rhythm was set.
However, the visual sense of rhythm causes a discrepancy with the actual sense of rhythm, which hinders performance. Therefore, various types have been proposed in which the tempo can be set by touching a touch switch or the like with a finger or the like at a desired rhythm speed before the performance starts. According to this, since the tempo can be set with an actual sense of rhythm, the above-mentioned drawbacks can be eliminated. However, with any of these methods, in order to change the preset rhythm tempo during the performance, for example, with an electronic organ, it is necessary to interrupt the performance of the left hand and operate the volume, etc. It was very difficult to set the desired rhythm tempo, which is different from the usual performance operation (key operation). It is especially necessary to change the rhythm tempo during the performance, such as when the tempo set before the performance does not match the performance, or when the tempo of the performance itself changes. It is expensive.

(3) Object of the Invention The present invention is to provide a rhythm tempo control device capable of selecting each kind of rhythm tempo while displaying it by a simple switch operation.

(4) Structure of the Invention In order to achieve the above-mentioned object, the automatic rhythm tempo control device of the present invention comprises a pair of switch means (11, 12) for increasing or decreasing the rhythm tempo value.
A switch state detection means (1) for detecting an operation state of the switch means, an operation time detection means (2) for detecting an operation time of the switch means in response to a detection result of the switch state detection means, When the detected operation time is less than the fixed time, the added value 1 is added, and when the detected operation time is the fixed time or more, the added value which is about one digit larger than 1 is added to the rhythm tempo value only once, respectively, to create a new rhythm tempo value. Adding means (3), counting data generating means (6) for generating counting data according to the new rhythm tempo value, clock generating means (4) for generating a constant clock, and the constant clock Counting means (8) for counting the counting data based on the above, and generating a desired rhythm pattern corresponding to the new rhythm tempo value.

(5) Example of the Invention The outline of the present invention is to display the number of rhythm tempos, that is, the number of quarter notes per minute, and to generate the rhythm tempo frequency corresponding to this number. These two rhythm tempo up and down switches are respectively turned on and the duration of the on is changed to make it faster or slower, and when both switches are turned on at the same time, the tempo is multiplied or divided. In this way, it is possible to switch to various rhythm tempos by a simple operation of only two switches.

FIG. 1 is an explanatory diagram of the configuration of the embodiment of the present invention. In the figure, the up switch 11 and the down switch 12 are operated, and the switch state detecting circuit 1 detects three modes of up switch on, down switch on, and both switches on as the on / off state of these switches.
Next, the up switch ON and down switch ON signals are input to the time detection circuit 2 to detect the continuation time by the clock 4, and a detection signal for a fixed time, for example, within 0.5 seconds or more, is sent to the addition circuit 3 for up / down. If within 0.5 seconds, add ± 1 to the current tempo number, and if within 0.5 seconds, add ± 1
Add 0. When both switches are turned on at the same time, this detection signal is sent to the multiplication circuit 5 and doubled or 1 / s in accordance with the previous state up / down from the addition circuit 3.
The result is doubled and output, and when only one side switch is turned on, the multiplication circuit 5 is passed through as it is. The output of the multiplying circuit 5 is branched into a part, the tempo number is displayed on the tempo indicator 13 through the display converting circuit 7, and the output is input to the rhythm tempo / frequency converting circuit 6. Here, the tempo number (T) shown in Table 1
Is converted into frequency division data (D) corresponding to the frequency () and is sent to the programmable counter 8. The programmable counter 8 uses the clock 4 to detect the time detection circuit 2
The frequency division ratio data D is counted in synchronism with and sent to the rhythm pattern generator 9 to form a pattern such as waltz, march or swing. Then, the output of the rhythm pattern generator 9 is sent to the rhythm sound generator 10 to generate a rhythm sound of a snare, a hi-hat, a bass drum, etc., and the sound device 14 emits the sound.

The following Table 1 used here is when the clock C = 640KHZ, (24; number of clocks that make quarter notes, quarter clock with 24 clocks) Is shown for changes in the tempo number T.

FIG. 2 is a flow chart showing the operation of the embodiment. In the figure, after the start, the switch 11, 12 and the switch state detection circuit 1 determine whether both switches are turned on or only one of them is pressed according to the procedure. If you have only one, follow the procedure to turn on the up switch.
ON / OFF of the down switch according to the procedure. If the up switch is ON in the procedure,
After waiting 0.5 seconds, ON / OFF is discriminated. If the ON duration is within 0.5 seconds, +1 is added to the current tempo number in the procedure, and if it is 0.5 seconds or more, +10 is added to the current tempo number in the procedure. If the down switch is ON in the procedure, wait 0.5 seconds in the same way to determine ON / OFF. If it is within 0.5 seconds, the procedure subtracts 1 from the current tempo number. Is subtracted. Above, and
The procedure is performed using the time detection circuit 2 and the addition circuit 3 shown in FIG.

Next, if both switches are turned on in the procedure, the multiplying circuit 5 in FIG. 1 determines in the procedure whether the previous tempo is double or 1/2 tempo.
Set it to 2 tempo (tempo x 1/2), and if it is not double tempo before, double tempo (tempo x 2) in the procedure.

The rhythm tempo set as described above is converted into frequency data by the rhythm tempo / frequency conversion circuit 6 shown in FIG. 1 as shown in the procedure. Further, the tempo number is displayed on the tempo indicator 12 via the display conversion circuit 7 as shown in the procedure. In the procedure, it is checked whether or not it is the current double tempo, and if it is the double tempo, the display blinks according to the procedure to indicate the double tempo mode. This is related to the procedure.

(6) Effects of the Invention As described above, according to the present invention, various rhythm tempo types are added by adding ± 1 or ± 10 depending on the combination of ON / OFF of two switches and the duration of ON. Since it is possible to select while displaying with a simple operation, it becomes much easier to set the tempo as compared with the conventional volume operation or a preset method.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of an embodiment of the present invention, and FIG. 2 is a flow chart showing an operation of the embodiment, in which 1 is a switch state detection circuit, 2 is a time detection circuit, 3 is an addition circuit, and 4 is Clock, 5 is a multiplication circuit, 6 is a rhythm tempo / frequency conversion circuit, 7 is a display conversion circuit, 9 is a programmable counter,
9 is a rhythm pattern generator, 10 is a rhythm sound generator, 11 is an up switch, 12 is a down switch, 13 is a tempo indicator, and 14 is an audio device.

Claims (1)

[Claims] 1. A pair of switch means (11, 12) for increasing or decreasing a rhythm tempo value, a switch state detecting means (1) for detecting an operation state of the switch means, and a response to a detection result of the switch state detecting means. An operation time detecting means (2) for detecting an operation time of the switch means, and an addition value 1 when the detected operation time is less than a certain time, and an order of magnitude larger than 1 when the operation time is more than the certain time. Adder means (3) for adding the added value only once to the rhythm tempo value to create a new rhythm tempo value, and count data generating means (6) for generating count data according to the new rhythm tempo value , A clock generating means (4) for generating a constant clock and a counting means (8) for counting the count data based on the constant clock, the desired rhythm pattern corresponding to the new rhythm tempo value. An automatic rhythm tempo control device characterized by generating a tone.