JPS5888793A - Rhythm pattern preparation circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rhythm pattern creation circuit designed to shorten the write operation time to a memory device and reduce input errors.

In various electronic musical instruments, multiple sound sources with different sound elements can be prepared by changing the configuration conditions of these oscillation circuits, so by combining these multiple sound sources, various musical instrument sounds can be created. Playback becomes possible. Therefore, create a desired rhythm pattern and drive the plurality of sound sources according to the desired rhythm pattern. Obtainable.

Also, by writing the desired rhythm pattern into a suitable memory element, it can be stored and programmed, and the rhythm pattern can be read out from the memory element to control the operations of a plurality of sound sources to repeatedly play the desired rhythm. You will be able to do this.

Furthermore, by programming another rhythm pattern in place of the above rhythm pattern, it becomes possible to perform other rhythms.

By the way, when programming a desired tongue turn to a memory element as mentioned above, for example, if we input four types of sound sources to a memory element having addresses 1 to 16, conventionally, one sound source is programmed for each sound source. Input operations (programming) were performed every night for each address in the series, requiring a total of 4XI6 = 64 input operations.

This has the disadvantage that programming operations (writing operations) take a long time.

Additionally, there is also the drawback that errors are likely to occur when inputting a desired sound source to the correct address.

The present invention has been made in response to the above problems, and includes a plurality of sound source selection switches for selecting a sound source to be input to a memory element corresponding to each of a plurality of sound sources, and a switch for writing the desired sound source to the memory element. A writing switch is prepared, and when a desired one of the plurality of sound source selection switches is turned on, the writing switch is turned on to simultaneously write a plurality of sound sources to the memory element, thereby eliminating the conventional drawbacks. It is an object of the present invention to provide a rhythm pattern generation circuit configured as described above. The present invention will be described in detail below with reference to the drawings. Is the diagram a rhythm pattern creation circuit according to an embodiment of the present invention? In the block diagram shown, 1 is a sound source, and there are multiple sound source circuits whose configuration conditions such as time constants are changed so that the sound elements are different, for example, four sound source circuits 1.
a, lb, lc.

For example, the four sound source circuits include 1a for the bass drum, 1b for the snare drum, 1C for the rim shot, and 1C for the rim shot.
d is constructed to be an accent. Reference numeral 2 denotes a memory element, which is constituted by a 4-bit capacity having addresses 1 to 16, for example, and operates to drive one of the above sound sources according to a rhythm pattern written in by the input signal of a desired sound source. The sound source selection switches 3a to 3al are provided correspondingly to the sound source circuits 1a to 1d, and serve to select the sound source to be input to the terminal IN of the memory element 2. . Reference numeral 4 denotes a fill-in switch which serves to write the input signal of the sound source selected by the selection switches 3a to 3d among the plurality of sound source circuits into the memory element 2. 5 is an oscillation circuit that generates l every time the write switch 4 is turned on.
Data is written in addition to the R/W terminal of the memory element 2 by generating a pulse. 6 is a counter which sends a 4-bit signal from the terminals Qo''-Q3 to the memory element 2 according to the input and designates the address to be written or read. 7 is for switching between write operation and read operation. changeover switch, 8 is a melody (
Performance) This is the start switch.

Reference numeral 9 denotes a second oscillation circuit which generates one pulse each time the changeover switch 7 is switched, clears the contents of the counter 6, and forces its output Qo = Q3 to a low level to output the memory element 20. It functions to return the address to the starting address (CO, O, sail 0).

When performing a write operation in the above configuration, the operation is as follows. First, a pulse is applied from the second oscillation circuit 9 to the counter 6 to switch the changeover switch 7 to the write side (W), thereby causing the counter 6 to return the memory element 2 to the starting address. In this state, select a desired one of the plurality of sound source selection switches 3a to 3d, for example, the bass drum switch 3a and the snare drum switch 3.
When the write switch 4 is turned on, the oscillation circuit 5 generates one pulse and writes (programming) the input signals of the bass drum and snare drum sound sources to the R/W terminal of the memory element, creating a one-step rhythm pattern. is memorized.

At the same time, the write switch 4 activates the counter 6 to advance the memory element 20 address by one.

Next, turn on the sound source selection switch that you want to input to memory element 2, and repeat the same operation as above for each address of memory element 20, for example, 16 times, so that each address receives input signals from different sound sources one after another. is written, and one rhythm pattern is created.

According to the present invention, when writing this sound source, the highest sound source 1 (sound source selection switch 3a) is simultaneously written to one address of the memory element 2.
~3d) Be able to write as much as the number. In other words, in the past, for each address of memory element 2,
It used to be necessary to repeat the write operation for each sound source by the number of addresses, but according to the present invention, it is only necessary to repeat the write operation by the number of addresses for each of the four sound sources in parallel.

Therefore, in the write example described above, it is possible to simultaneously write to each address of the memory element 2 from at least one sound source to at most four sound sources.

Next, when performing a reading (playing) operation, switch the changeover switch 7 to the reading side (Ftl) and turn on the start switch 8 to return the memory element 2 to the start address. Oscillation circuit 9
By operating the 0 function (does not work during writing), 6 counters are activated and memory element address 20 v is activated.
ooooo.

The desired rhythm is played by sequentially incrementing the address one by one and driving one sound source according to the rhythm pattern written in advance.

As described above, according to the present invention, there are provided a plurality of sound source selection switches for selecting a sound source to be input to a memory element corresponding to a plurality of sound source pots, and a write switch for writing a desired sound source to the memory element. By preparing a plurality of sound source selection switches and turning on the desired one of the plurality of sound source selection switches, by turning on the write switch, it is possible to simultaneously write into the memory element of a plurality of sound sources, thereby shortening the write operation time. be able to. In addition, this naturally reduces errors in input operations.

The types and combinations of sound sources can be arbitrarily selected depending on the purpose and use. Furthermore, the same applies to the capacity and type of the memory element.

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of the present invention. 1.1a-1(]-... sound source, 2... memory element, 3.3a-3d... sound source selection switch, 4... writing switch, 5.9... oscillation circuit, 6. ...Counter, 7...Write/read selector switch, 8
...Start switch. Patent applicant Clarion Co., Ltd.

Claims (1)

[Claims] (1) A plurality of sound sources, a memory element for driving the plurality of sound sources, and a memory element provided corresponding to the plurality of sound sources for selecting a sound source desired to be input to the memory element. It includes a plurality of sound source selection switches and a write switch for writing the input signal of a desired sound source into the memory element, and when a desired one of the plurality of sound source selection switches is turned on, the write switch is simultaneously turned on. A rhythm pattern creation circuit characterized in that it is configured such that a plurality of sound sources can be written into the memory element. 2. A patent claim comprising a counter for specifying the address of the memory element, and configured to advance the address of the memory element by one when a desired sound source is written in the memory element. The rhythm pattern creation circuit according to item 1. 3. Claims characterized in that the device includes a changeover switch for switching between a write operation and a read operation, and is configured such that a desired sound source is written into the memory element when the changeover switch is switched to the write operation side. The rhythm pattern creation circuit according to item 1 or 2.