JPH0631971B2 - Electronic musical instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument that assigns a key code signal from a keyboard and an external source with a single assign memory.

2. Description of the Related Art In recent years, with the spread of personal computers and the like, as an application field thereof, musical tone generation control data is created by personal computers and the like and is given to an electronic musical instrument, and the electronic musical instrument is caused to produce a desired sound, and electronic music is played. Things are getting done.

Hereinafter, a conventional electronic musical instrument will be described with reference to the drawings.

FIG. 5 is a block diagram of a conventional electronic musical instrument. 10 is a keyboard,
Reference numeral 11 is a keyboard circuit, 12 is a key assign device, and 13 is a tone generator.

The operation of the electronic musical instrument configured as described above will be described below.

First, when the keyboard 10 is operated, the on / off state of each key is detected by the keyboard circuit 11. A key number is set in advance for each key, and the keyboard circuit 11 outputs the key number of the key whose on / off state has changed and a key code signal composed of a gate flag for identifying the on / off state. It is created and sent to the key assigning device 12. The key assign device 12 is provided with an assign memory having a number of addresses equal to the number of tone generation channels of the tone generator 13. With respect to the key code signal from the keyboard circuit 11, key-on / key-off is discriminated by the gate flag. In the case of key-on, an empty address in which the gate flag is in the on state is searched for in the assign memory, and the gate flag and the key of the key code signal are input. Write the number to that address. On the other hand, in the case of key-off, an address having a key number that matches the key number of the key code signal is searched from each address of the assign memory, and the gate flag (key-off) and the key number are written in that address.

Each address of the assign memory and each tone generation channel of the tone generator have a one-to-one correspondence, and each tone generation channel operates in response to the key number and gate flag written in each address of the assign memory to generate a musical tone. To do.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, with the above configuration, in order to control the sounding of an electronic musical instrument from the outside such as a personal computer simultaneously with the performance of the keyboard, a key code signal from the keyboard and a key code from the outside are required. It is necessary to distinguish between the signals and the signals, but the above-mentioned configuration cannot process a plurality of types of key code signals, and therefore has the problem that it is not possible to control sound generation from the outside and simultaneously play the keyboard. It was

In view of the above problems, the present invention provides an electronic musical instrument capable of assigning a plurality of types of key code signals by prioritizing them according to their types.

The present invention relates to a keyboard circuit that generates a key code signal in response to a keyboard operation, an input unit that receives a key code signal from the outside, a tone generator having a plurality of sound generation channels, and An assign memory for instructing the tone generator's sounding state, a key code signal with an identification code between the keyboard circuit and the outside, and a key-on / off determination means for identifying key-on / key-off, and a key-code signal for key-on. , An on-channel setting means for setting an address to be assigned according to the priority of the identification code, and an off-channel setting means for setting a key code signal in the case of key-off according to the identification code And assign a key code based on the on-channel setting means and off-channel setting means. It is equipped with a means called a writing means.

The present invention has the above-described configuration, and assigns priority to the key code signals from both the keyboard circuit and the outside and assigns them to give priority to either the keyboard performance or the external tone control. This allows simultaneous performance with controlled pronunciation.

Description of Embodiments An embodiment of the present invention will be described below with reference to the drawings of an electronic musical instrument.

FIG. 1 shows the configuration of an embodiment of the present invention. First
In the figure, reference numeral 23 is an input section for receiving a key code signal from the outside, and 24 is an identification code (keyboard code) for distinguishing the key code signal from the key code signal from the keyboard circuit or from the outside. Is added to the key code signal, and the key code signal determines whether the key is on or off. In the case of key-on, 25 is an address for assigning the key code signal in the assign memory according to the priority of the keyboard code. On-channel setting means, 26 is the case of key-off, the key code signal is to be assigned Find address from assigned memory,
The off-channel setting means 27 is an assign memory writing means for writing a key code to an address to be assigned based on the on-channel setting means 25 and the off-channel setting means 26. Reference numeral 21 is a keyboard, 22 is a keyboard circuit, 28 is an assign memory, and 29 is a tone generator, which are the same as those in the conventional example.

The electronic musical instrument configured as described above will be described below with reference to FIG.
The operation will be described with reference to FIGS. 2, 3, and 4.

The capacity of the assignment memory 28 is determined by the number of tone generation channels in the tone generator 29. For example,
If there are eight tone generation channels, the assign memory is composed of 8 bytes. The structure is shown in Table 1.

At each address of the assign memory 28, a keyboard code KB, a gate flag GF and a key number KN are stored. The keyboard code KB distinguishes between a key code from the keyboard circuit and a key code signal from the outside. The keyboard code KB is 0 from the keyboard circuit and 1 from the outside. The gate flag is set to 1 for key-on and 0 for key-off to distinguish the key-on / off state. The key number represents the pitch of the key and represents a value from 1 to 61.

i) Operation of key-on / off judging means FIG. 2 is a flowchart of the key-on / off judging means. First, in step 31, the presence or absence of a key code signal from the keyboard circuit 22 is checked. If there is a key code signal, the process proceeds to step 34, 8-bit data 00000000 is written in the register A, and the process proceeds to step 35. on the other hand,
If there is no key code signal, the process proceeds to step 32, and the presence or absence of an external key code signal to the input unit 23 is checked. If there is a key code signal, 8-bit data 10000000 is written in the register A, and the process proceeds to step 35. On the other hand, if there is no key code signal, the process returns to step 31. In step 35, the key code signal (composed of 7 bits and the keyboard code is 0) from the keyboard circuit 22 or the input section 23 is written in the register B. Then step 36
To calculate the logical sum of register A and register B,
Write to register A. Next, in step 37, the 6th bit of the register A, that is, the gate flag GF is checked, and if it is 1, it is determined to be key-on, and to the on-channel setting means, and if the gate flag is 0, it is determined to be key-off. To the off-channel setting means.

ii) On-Channel Setting Means FIG. 3 is a flowchart of the on-channel setting means. In step 41, an empty channel is searched from each address of the assign memory 28. This means that if the gate flag of each address is 0, it means that the key is off, and the corresponding sounding channel is also in the key off state.
Judge as an empty channel. If there is an empty channel, the process proceeds to step 43, and the address number of the empty channel is written in the register B. On the other hand, if there are no empty channels,
Go to step 42. Here, the key old table will be described. The key old table includes a key old table (KOD) for keyboard circuit and a key old table (EOD) for external input, each of which is composed of 8 bytes. This is shown in Table 2.

KOD stores the address of the assign memory in the order of the oldest key-on assignment of the key code signal from the keyboard circuit, and is stored in KOD1, KOD2, ... KOD8 in order from the oldest assigned address. Similarly, the EOD stores the addresses of the assign memory in the order of the oldest key-on assignment of the external key code signal, and the address with the oldest assignment is stored in the EOD1.

In step 42, it is checked whether the contents of the key old table EOD are all 0 from KOD1 to KOD8. That is, it is checked whether a key code signal from the outside is assigned. If all EODs are 0, go to step 44, while EO
If all of D are not 0, the process proceeds to step 47. In step 44, the contents written in KOD1, that is,
Of the key-on assignments of the key code signal from the keyboard circuit, the oldest assigned address is set in register B.
Write in. Next, in step 45, the address data is shifted by one address in the KOD. This is shown in Table 3. Data (0000 ... 0) is written in KOD8.

Next, the process proceeds to step 46, and from KOD1 to KOD2, in order.
The content of the register B is written into the KOD where the content is (00000000), that is, the address of the assign memory is not written. This is because the stored contents of the key old table KOD are arranged in order of oldest key-on assignment.

On the other hand, in step 47, the key old table EOD1
After writing the data of B to the register B, step 48,
In step 49, the same processing as in steps 45 and 46 is performed. It is equivalent if EOD is used instead of KOD. This is also because the stored contents of the key old table EOD are arranged in the order of oldest key-on assignment.

When step 43, step 46, or step 49 is completed as described above, the process proceeds to the assign memory writing means.

iii) Off Channel Setting Means FIG. 4 is a flowchart of the off channel setting means. In step 51, the contents of each address of the assign memory are checked to find the address of the assign memory that stores the key number that matches the key number of the key code signal of the register A. If there is a matching address, the process proceeds to step 52. If there is no matching address, the process proceeds to step 54. In step 52, the keyboard code of the content of the address where the key numbers match is
The keyboard code of the register A is compared to see if they match, and if they match, to step 53, and to step 54 if they do not match. In step 53, the address number of this address is written in the register B, and the process proceeds to step 55.
In step 55, if the keyboard code of the key code signal of the register A is 1, the process proceeds to step 58, and if the keyboard code is 0, the process proceeds to step 56. Step 5
In 6, register B from key old table KOD
Address with the same address number as the contents of
Search). Next, in step 57, the data after this address (inside KOD) is shifted and KOD
The data (00000000) is written in No. 8. For example, A to KOD1 to KOD5 of Key Old Table KOD,
Address data of B, C, D, E is stored, and KOD
When the data of 6 to KOD8 is "0" and the content of the register B is the address data C, KOD4 to KO
The data of D7 is transferred to KOD3 to KOD7 (see Table 4).

As a result, the address data C is erased.

Also in step 58 and step 59, step 56,
The same processing as step 57 is performed.

It is equivalent if EOD is used instead of KOD.

Thus, the key old tables KOD and EOD store the address data of the assign memory corresponding to the tone generation channel in the key-on state. Step 5
In 4, the data (00000000) is written in the register B, and the process ends.

After completion of steps 54, 57 and 59, the process proceeds to the assign memory writing means.

iv) Assign memory writing means If the content of the register B is (00000000), writing to the assign memory is not performed. When the content of the register B is not (00000000), the key code signal which is the content of the register A is written in the address indicated by the register B.

The contents of each address in the assign memory are sent to the tone generator as key numbers as pitch information and gate flags as ON / OFF information to control the tone generation state.

As described above, according to the present embodiment, by adding the keyboard code for distinguishing the key code signal from the keyboard circuit and the key code signal from the outside and performing the key assignment process, the key code signal of the keyboard circuit is obtained. Can be controlled with priority over an external key code signal, and can be played simultaneously with both key code signals.

In the present embodiment, the key code signal from the keyboard circuit is prioritized over the key code signal from the outside, but this may be reversed. Further, although the number of tone generation channels of the tone generator is eight, it goes without saying that the number is not limited to this.

The present invention receives a key code signal from the keyboard circuit and the outside, creates a keyboard code which is an identification code between the keyboard circuit and the outside by the key on / off judging means, and further judges whether the key is on or off. Next, in the case of key-on, the on-channel setting means assigns the priority by the keyboard code to set the address of the assign memory to be assigned, and in the case of key-off, refers to the keyboard code in the off-channel setting means. At the same time, the address of the assign memory to be assigned is set, and the key code signal is written to the set address in the assign memory writing means. One is given priority to the keyboard circuit and the control from the outside. As a result, it is possible to perform assignment processing that shares the tone generator. .

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flow chart of key-on / off determination means, FIG. 3 is a flow chart of on-channel setting means, FIG. 4 is a flow chart of off-channel setting means, and FIG. FIG. 6 is a configuration diagram of a conventional example. 22 ... keyboard circuit, 23 ... input section, 24 ... key on / off determination means, 25 ... on channel setting means, 26
...... Off channel setting means, 27 ...... assignment memory writing means, 28 ...... assignment memory, 29 ...... tone generator.

Claims (1)

[Claims] 1. A keyboard circuit for generating a key code signal in response to a keyboard operation, an input section for receiving a key code signal from the outside, a tone generator having a plurality of tone generation channels, and tone generation channels of the tone generator. An assignment memory for instructing the sounding state of the key, a key-on / off determination means for determining the key-on / key-off from the key-code signal while adding the identification codes of the keyboard circuit and the input section to the key-code signal, and the key-on determination When,
An on-channel setting means for setting a channel to which a key code signal is to be assigned based on the priority of the identification code, an off-channel setting means for determining the key-off, and a channel to which a key code is to be assigned by the identification code. And an assign memory writing means for writing processing to the assign memory according to the settings made by the on-channel setting means and the off-channel setting means.