JPS6230075Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic rhythm playing device that displays the rhythm tempo speed and visually displays the beginning of the rhythm performance sound.

An automatic rhythm performance device is equipped with a tempo oscillator that generates a reference signal that forms a rhythm, and divides the tempo clock signal from this tempo oscillator as appropriate, and then sequentially generates pulses using a counting signal from a counting circuit or the like. These sequential pulse signals are combined in a logic circuit such as a matrix to form a rhythm pattern signal corresponding to the type of rhythm such as waltz, march, rumba, etc. Based on this rhythm pattern signal, a rhythm sound source such as a bass drum, snare drum, conga, etc. is driven to generate rhythm performance sounds.

In other words, in such an automatic rhythm performance device, automatic rhythm performance sounds can be obtained by selecting and specifying the type of rhythm and driving the rhythm generator with a tempo clock signal from the tempo oscillator. However, by simultaneously controlling the oscillation frequency of the tempo oscillator, the rhythm tempo of the resulting automatic rhythm performance sound is specified. For this reason, a tempo oscillator is usually configured so that its oscillation frequency can be variably controlled.The oscillation frequency of the oscillator is set using a control on the panel, and the rhythm tempo can be arbitrarily controlled. It is configured to allow variable control.

However, as it is, the tempo speed of the rhythm performance sound is determined by the performer's sense of hearing, and it is difficult to set it numerically accurately. I can't.

For this reason, it is possible to quantify and display the tempo speed by, for example, counting the tempo clock signal from a tempo oscillator, but when playing an electronic musical instrument or the like in response to actual automatic rhythm performance, It is also desirable that bar breaks, etc., be clearly displayed.

This idea was created in view of the above points, and it is an automatic rhythm performance device that clearly displays the rhythm tempo speed and bar divisions, making it especially possible to design the operation panel section effectively. This system counts and detects the tempo clock signal that causes rhythm performance, displays the tempo speed on a display, and extracts the measure start detection signal from the rhythm generator.
This signal is used to control the optical display of the display section.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 shows its configuration. Numeral 11 is a variable element controlled by a tempo adjustment knob (not shown), and the oscillation clock frequency of the tempo oscillator 12 is variably controlled by this variable element 11. The clock signal from the tempo oscillator 12 is appropriately frequency-divided by a frequency dividing circuit 13 and supplied to an automatic rhythm generating section 14 consisting of a rhythm pattern generating section, a rhythm sound source section, etc., which generates a rhythm sound source corresponding to the speed of the clock signal. Generate a signal. After this rhythm sound source signal is suitably amplified by an amplifier 15, it is supplied to a speaker 16 and is generated as a rhythm performance sound. Also,
The automatic rhythm generator 14 generates a leading detection signal corresponding to the leading beat in a measure of the internally formed rhythm pattern signal along with the rhythm sound source signal as described above. The light is supplied to the optical display element 17 so that a light display is made corresponding to the beginning of the bar.

The tempo clock signal from the tempo oscillator 12 is further supplied to a counting circuit 18 to count and drive it. This counting circuit 18 is reset by the reference time signal S from the reference time signal generation circuit 19, and the count value information is stored in the storage device 2.
0, and this storage device 20 is read and controlled by the reference time signal S. That is,
The reference time signal S is generated at a specified period, and the counting circuit 18 counts the number of clock signals from the tempo oscillator 12 that are generated between the reference time signals S, and the count value information is stored in the storage device. 20, and the count value information is a value proportional to the tempo speed. The numerical information stored in this storage device 20 is displayed as a tempo speed on a digital display 21.

Here, for example, when the clock signal frequency from the tempo oscillator 12 is 800Hz, one minute is 60 seconds per quarter note.
Assuming that a beat rhythm performance is performed,
Reference time signal S from reference time signal generation circuit 19
If the interval is 0.075 seconds, the counting circuit 18 will repeatedly count "60" and display the numerical value "60" on the display 21 to represent that a rhythm performance with a tempo of "60" will be performed. Become.

FIG. 2 shows a specific example of the structure of the automatic rhythm generator 14, which includes a binary counter 22, which forms a tempo clock signal from the tempo oscillator 12. (The frequency divider circuit 13 is omitted here for convenience.) That is,
The counter 22 outputs a binary counting signal of multiple bits, and the signal corresponding to each bit becomes a sequential pulse signal whose period changes sequentially. It is converted into a rhythm pattern signal according to the rhythm type. The plurality of types of rhythm pattern signals generated by the rhythm pattern generation circuit 23 are selected by the rhythm selector 24 according to commands from the rhythm selection switch 25, and the rhythm sound source circuit 26a generates sound source signals for bass drum, snare drum, etc. , 26b are selectively controlled to generate a rhythm sound source signal corresponding to the rhythm pattern and lead it to the amplifier 15.

Here, the rhythm pattern generation circuit 23 generates a rhythm pattern signal for one bar in one count cycle of the counter 22, and the counter 22 generates "000...00", "100...00"..."111...11". The output information changes as follows. Therefore, this counter 2
If the NOR circuit 27 detects a condition in which all the bits of 2 are "0", the detection signal from the NOR circuit 27 becomes the first detection signal generated corresponding to the first beat of each bar. Therefore, it is sufficient to drive the optical display 17 with the output signal of this NOR circuit 27.

FIG. 3 shows the operation panel section of this automatic rhythm performance device. A selection switch 25 is provided, and a tempo control knob 30 and a volume control knob 3 for controlling the variable element 11 are provided.
1. An on/off switch 32 is provided. The display unit 21 is composed of, for example, a reference quarter note indication mark 33, a digital numerical value display window 34, and an equal mark 35 that connects these. As shown in A and B.

As is clear from the cross-sectional structure of B in FIG. 4, the indicator 21 has an indicator mark 33 consisting of a window portion 33a made of translucent plastic or the like and a bar-shaped portion 33b formed by printing or pasting. configured,
The display device 17 is housed inside the window portion 33a.

That is, when an automatic rhythm performance is performed, a tempo clock signal with a frequency corresponding to the setting state of the knob 30 is obtained from the tempo oscillator 12, and a rhythm pattern signal with a tempo corresponding to this signal is generated. A numerical value corresponding to the tempo speed is displayed on the display window 33 of the display 21, so that the tempo speed can be confirmed numerically. At the same time, the instruction mark 33 on this display 21
This is an optical display that is displayed at the first beat of a rhythm pattern, that is, at the beginning of a measure, and is used not only to set the rhythm tempo, but also to effectively synchronize the performance with other electronic musical instruments. be.

In particular, since there is no need to provide a special display for displaying the beginning of each measure, the design of the operation panel of this device is extremely simple.
Further, since the visual confirmation is performed at the same location as the tempo speed confirmation, the display confirmation work is simplified, and it becomes possible to more effectively perform an ensemble performance with an electronic musical instrument.

Incidentally, the means for installing the optical indicator 17 is the indicator 2.
Various things can be considered in addition to 1. For example, 5th
As shown in the figure, a frame 36 made of glass, translucent plastic, etc. is provided around the outer periphery of the digital numerical value display window 34, and an optical indicator is placed in a bottom plate 37 made of a light-guiding material (optical fiber, etc.) provided at the bottom of the frame 36. 17 may be installed so that the window frame 36 or the window cover covering the entire window 34 is effectively illuminated. When the entire window cover is made to glow, it is desirable to make the luminescence color different from that of the digital display section. Also,
In addition, the equal mark 35 may be made of a translucent window, and the decimal point 38 of the window 34 may be illuminated as appropriate.

In this case, if the window portion 33a of the instruction mark 33, the window frame 36 of the tempo display window 34, or the window cover are made of smoked acrylic, reflection of light from the outside can be prevented and light from the inside can be easily read.

In the embodiment, the clock signal from the tempo oscillator 12 is divided by the reference time signal and counted to obtain tempo display information. The period time may be counted and measured using another high-speed pulse signal, and this measurement information may be calculated and changed into tempo speed information as appropriate, and various means for obtaining this tempo speed information can be considered.

As described above, according to this invention, it is possible to effectively display the timing of the beginning of a measure in a rhythm pattern as well as the rhythm tempo speed, and the configuration of this type of automatic rhythm performance device, especially in terms of operation, is extremely simple. It also facilitates visual confirmation, and its practical effects are significant.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram illustrating an automatic rhythm playing device according to an embodiment of this invention, Fig. 2 is a diagram showing an extracted automatic rhythm generating section of the above embodiment, and Fig. 3 similarly shows the operation panel surface. Figure, A and B in Figure 4
5 is a plan view and a side sectional view showing a display unit on the operation panel surface, and FIG. 5 is a side sectional view showing another example of the display unit. 11...variable element, 12...tempo oscillator, 1
4...Automatic rhythm generator, 17...Light indicator, 1
8...Counting circuit, 19...Reference time signal generation circuit, 20...Storage device, 21...Display device.

Claims (1)

[Scope of utility model registration request] a tempo oscillator whose oscillation frequency is controlled;
an automatic rhythm generating section that forms a rhythm pattern based on the tempo clock signal from the oscillator and generates a rhythm performance musical tone; a means for detecting the tempo clock signal from the tempo oscillator and numerically detecting the tempo speed; the automatic rhythm generator, comprising: a display for displaying the converted tempo speed; and means for detecting the beginning of a rhythm from the automatic rhythm generating section, and controlling the optical display of the display section based on the rhythm beginning detection signal. Rhythm performance device.