JPH0121514B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic rhythm performance device that allows other musical instruments to more effectively play along with automatically generated rhythm performance sounds.

The automatic rhythm performance device is equipped with a tempo oscillator that generates a reference signal for rhythm formation, divides the tempo clock signal from the tempo oscillator as appropriate, and sequentially forms pulse signals using a counting signal from a counting circuit or the like. , these sequential pulse signals are combined by 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 or a snare drum is driven to generate rhythm performance sounds.

The rhythm playing sound from such an automatic rhythm playing device is used as an accompaniment rhythm sound when playing an electronic musical instrument or other musical instrument, and the musical instrument is played in accordance with the rhythm of the automatic rhythm playing sound. In other words, a musical instrument is played at a tempo based on the automatic rhythm performance sound, and the instrument player always senses the rhythm beat of the automatic rhythm performance sound and performs musical operations in synchronization with this. Especially for beginners, it is difficult to clearly recognize the rhythm tempo. For this reason,
It has been considered to turn on a display device such as a lamp in response to the basic rhythm beat of the rhythm performance sound from an automatic rhythm performance device.

In this case, if the light is displayed corresponding to every beat of the rhythm performance sound, it is virtually impossible to make the user recognize a specific rhythm timing such as the beginning of a measure. The lighting display is performed only in response to the beats that are lit. Therefore, the lighting timing of this rhythm display is set at relatively long intervals, such as at the beginning of each measure, and especially when the time interval of this lighting display is long, the lighting timing It becomes difficult to predict. This makes it difficult for beginners in particular to operate, for example, the keys of an electronic musical instrument in synchronization with the rhythm beat, and the rhythm performance sounds and the instrument performance sounds may become out of sync, making it ineffective for practicing playing musical instruments, etc. .

This invention was made in view of the above points. For example, the timing of rhythm beats is displayed accurately using a display mechanism so that the keys of an electronic musical instrument can be operated reliably at the appropriate timing. The present invention aims to provide an automatic rhythm performance device that allows even beginners to easily perform accurate rhythm performance, and is normally set to a specified steady display state. A display element is provided,
Furthermore, the timing signal immediately before the rhythm beat specified from the rhythm pattern generating section is detected, and the display state of the display element is changed using this timing signal in a state that is shorter than one beat. By operating the keys in response to changes in the display state, the key operations are reliably performed in accordance with the rhythm beat.

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows its configuration. A tempo oscillator 11 oscillates a tempo clock signal that serves as a reference for forming a rhythm pattern. The oscillation clock signal frequency is determined by a variable element driven by a tempo adjustment knob, etc. 12. The tempo clock signal from the tempo oscillator 11 is supplied to the counter 13 as a counting step signal (via a frequency dividing circuit as necessary). This counter 13 outputs, for example, a 5-bit binary count signal _Q1 to _Q5 , which is sent to the rhythm pattern forming circuit 14 as a 6-bit binary count value signal together with the _Q0 signal corresponding to the input tempo clock signal. supply That is, this circuit 1
The signals Q ₀ to _{Q 5} supplied to the circuits 4 are sequential pulse signals that sequentially change to "1" and "0" at twice the period, and the rhythm pattern forming circuit 14 converts these sequential pulse signals into matrix logic. By selectively combining them using a circuit or the like, rhythm pattern signals corresponding to various rhythms are formed. The rhythm pattern signal generated by the rhythm pattern forming circuit 14 is supplied to the rhythm sector 15, which selects the type of rhythm pattern signal corresponding to the selection command from the rhythm selector switch 16. The rhythm pattern signal selected by the rhythm selector 15 is a bass drum,
It is supplied to a rhythm sound source circuit 17 consisting of a rhythm sound source such as a snare drum to generate a rhythm sound source signal corresponding to the rhythm pattern, and this rhythm sound source signal is suitably amplified by an amplifier 18 and then supplied to a speaker 19 for rhythm performance. It becomes pronounced as a sound.

Furthermore, the rhythm pattern forming circuit 14 extracts a detection signal D at a timing immediately before the first beat of each bar. This detection signal D is supplied to a lighting driver circuit 21 of a display element 20 such as a lamp or a light emitting diode.
is configured, for example, as shown in FIG.

That is, the detection signal D is supplied to the base of a first transistor Tr ₁ whose emitter is grounded through a resistor R ₂ whose collector is supplied with the power +V via a resistor R ₁ , and this transistor Tr ₁ receives the signal D. When the emitter and collector are present, conduction is established between the emitter and the collector. This first
The base of the second transistor Tr ₂ is connected to the collector of the transistor Tr ₁ ,
The display element 20 is connected between the emitter of the transistor Tr ₂ and the ground point, and a power supply +V is supplied to the collector through the resistor R ₃ . Therefore, this second transistor Tr ₂
, the detection signal D does not exist and the first transistor
When Tr ₁ is non-conductive, a base bias is applied through the resistor R ₁ to set it in a conductive state, and the display element 20 is in a lighting state. Then, when the first transistor Tr 1 becomes conductive due to the detection signal D, the second transistor Tr ₁ becomes conductive.
The base potential of the transistor Tr ₂ decreases, this transistor Tr ₂ becomes non-conductive, and the display element 2
A lighting state of 0 is prohibited. That is, the display element 20 is normally in a lit state, and is turned off when there is a detection signal D generated just before the first beat of each bar, and the time when the display element 20 is turned on is at the beginning of each bar. This corresponds to the beat timing.

FIG. 3 shows a waveform diagram illustrating the means for obtaining the detection signal D, in which the tempo oscillator 11
The tempo clock signal _Q0 given to the counter 13 from
The count of 3 goes through one cycle, and this one cycle corresponds to one measure of the rhythm pattern. and,
Signals Q ₁ to _{Q 3} in which this signal Q ₀ is successively divided by 1/2
are in the state shown in the figure, and the signals Q ₀ to _{Q 5}
The timing at which all of the values become "1" is the first beat of each measure. Therefore, the timing detection signal D immediately before the first beat of each bar is the signal
It is sufficient to generate the condition when all of Q ₀ to Q ₅ are "0", and specifically, it is sufficient to use the NOR output of the signals Q ₀ to _{Q 5} as the detection signal D. . In this case, the detection signal D is set to a time sufficiently shorter than the time interval of one beat, and the lighting state of the display element 20 is controlled by the width of the detection signal D.

That is, according to the apparatus configured as described above, by giving a rhythm type selection command from the selector switch 16 to the rhythm selector 15,
Based on the tempo clock signal from the tempo oscillator 11, the rhythm pattern signal formed by the rhythm pattern forming circuit 14 is selected, and the rhythm sound source circuit 17 is driven to obtain an automatic rhythm performance sound. Furthermore, a detection signal D as shown in FIG. 8 is obtained from the rhythm pattern forming circuit 14, and since this signal D is supplied to the driver circuit 21 as shown in FIG. Immediately before the first beat of , the display element 20, which is normally lit, is turned off, and is turned on in synchronization with the first beat.

That is, at the beginning of each bar, the display element 20 is turned off in a state that foretells the occurrence of the first beat, and is turned on in synchronization with the first beat, and the performance sound is heard when the display element 20 is turned off. According to
All that is needed is to prepare for the occurrence of the first beat of each bar. Therefore, even if the rhythm is visually displayed in units of measures and there is a time interval, the performance sound predicts the timing of the first beat of the next measure by turning off the display element 20. Therefore, it becomes possible to effectively play an electronic musical instrument, for example, in accordance with the automatic rhythm performance sound.

In the above embodiment, the display prohibition state of the display element 20 is set immediately before the first beat of each bar, but this is set immediately before the timing of the presence of a quarter note, etc. in each bar from the rhythm pattern forming circuit 14. For example, in the case of a four-beat beat, it is also effective to generate the detection signal D by turning off the display element 20 to foretell the rise of the basic beat.

In addition, the time width for inhibiting the display of the display element 20 was set to the length of a 32nd note in the embodiment, as is clear from the signal D in FIG. It is sufficient to set it to a time width, and it is actually preferable to set it to the length of a quarter note or less.

As described above, according to the present invention, in an automatic rhythm performance device, the occurrence of a basic rhythm beat can be predicted by the display, and the key operation of an electronic musical instrument, for example, can be performed in synchronization with the rhythm beat. It is particularly effective for beginners who have not yet fully acquired a sense of rhythm to play musical instruments with automatic rhythm performance. In particular, since the display state of the display element changes over a period of time shorter than one night immediately before the specified rhythm beat, it is possible to easily and clearly determine the start time of a predetermined rhythm beat. This makes it possible to more accurately instruct the key operation timing and enable the performer to easily and reliably perform key operations corresponding to this instruction.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining one embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the driver circuit of the above embodiment, and FIG. 3 is for explaining a detection signal for inhibiting display. It is a signal waveform diagram. 11... Tempo oscillator, 13... Counter, 1
4... Rhythm pattern forming circuit, 15... Rhythm selector, 16... Rhythm sound source circuit, 20... Display element, 21... Driver circuit.

Claims (1)

[Claims] 1 (a) means for forming a rhythm pattern signal based on a tempo clock signal; (b) a rhythm sound source circuit driven in accordance with the rhythm pattern signal; and (c) means for forming a rhythm pattern signal based on the rhythm pattern signal. (d) means for generating a pulse signal having a pulse width shorter than the time of one beat that ends immediately before the specified rhythm beat; (d) displaying the display element in a display state different from the steady display state in the state in which the pulse signal is supplied; a display driver circuit that sets the display element to the different display state immediately before the specified rhythm beat, and sets the display element to the different display state immediately before the specified rhythm beat, and sets the display element to the specified rhythm beat at the start timing of the steady display state of the display element. An automatic rhythm performance device characterized in that the beat timing is matched.