JPH0743592B2 - Sound source system - Google Patents

Description

The present invention relates to a musical tone unit of an electronic musical instrument suitable for use in an electronic musical instrument or the like.

[Prior Art] Conventionally, as a musical tone generating device for an electronic musical instrument, a musical tone signal is generated by performing a predetermined musical tone generating calculation by giving a plurality of arithmetic channels per musical tone generating channel, and a musical tone signal is generated based on this musical tone signal. A device that generates a noise has been developed (see, for example, JP-A-61-294499). This apparatus increases the number of generated tone channels by reducing the number of calculation channels assigned to one tone generation channel.

[Problems to be Solved by the Invention] In the above-described conventional musical tone generating apparatus, in order to give a desired number of calculation channels to one musical tone generating channel, software of a pitch designating device such as a keyboard is used. Etc. had to be changed. Further, when the number of musical tone generating channels is increased, the number of calculation channels to be given to one musical tone generating channel is reduced, so that the sound quality is deteriorated.

The present invention has been made in view of the above circumstances, and it is possible to increase the number of musical sound generation channels without changing the pitch designating device such as a keyboard at all and without causing deterioration of sound quality. It is intended to provide a sound source unit for an electronic musical instrument.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention comprises first and second tone generator units each having a tone generating means for generating a tone signal based on tone information input from the outside. In this sound source system, there is provided a designating unit for generating first reception condition data for designating a reception condition of the sound source system, wherein the first sound source unit includes: (A) the first sound source generated by the designating unit. First receiving condition setting means for setting the receiving condition of the first sound source unit based on the receiving condition data of (1), and (B) the musical tone information input from the outside, which is set by the first receiving condition setting means. Based on the first receiving condition data generated from the designating means, the first controlling means supplying to the musical sound generating means only the musical tone information matching the receiving condition. Reception condition setting means for generating second reception condition data, wherein the second sound source unit comprises: (a) the second sound source based on the second reception condition data generated by the reception condition generation means. Second receiving condition setting means for setting the receiving condition of the unit; and (b) only the tone information that is received from the outside and that matches the receiving condition set by the second receiving condition setting means, Second control means for supplying the musical sound generating means.

[Operation] According to the present invention, when the receiving condition of the sound source system is specified by the specifying means, the receiving condition of the first and second sound source units is automatically set. The first and second sound source units generate a music signal based on the inputted musical tone information only when the musical tone information inputted from the outside matches the respective reception conditions.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the electrical construction of an embodiment of the present invention.

In this figure, reference numeral 1 is a pitch designating device (for example, a keyboard unit), which has a plurality of keys, a plurality of key switches for detecting the on / off state of each key, and an output of each of the key switches. Based on MIDI (Musical Instrument
It has a digital interface) standard (unified standard for electronic musical instruments) and a MIDI circuit for outputting the generated signal to the outside. This MIDI circuit creates key information MD from the output of each key switch. This key information MD
Is composed of 3 bytes as shown below.

The first byte indicates the key on / off state.

In this example, 90 _H ~9F _H is turned on 80 _H ~8F _H is turned off (the 0 to F _H indicates the channel number) to the second byte key code is shown.

In this embodiment, it takes the value of 1~127 (01 _H ~7F _H).

Touch information is shown in the third byte.

In this embodiment, it takes the value of 0~127 (00 _H ~7F _H).

Here, FIG. 2 shows the correspondence between the above-mentioned keys and key codes.

A MIDI receiving circuit 2 reads a MIDI standard signal output from the tone pitch designating device 1 through a MIDI IN (midi-in) terminal and outputs it to a bus line B. Also,
The MIDI receiving circuit 2 is provided with a MIDI THRU (midi-through) terminal for outputting the read signal as it is. 3 is an operation panel, and the number setting switch 3
a, a reception note setting switch 3b, a switch for setting the volume and tone color, and the like. Reference numeral 4 is a CPU (central processing unit) that controls each part of the apparatus, 5 is a program memory in which the programs of the CPU 4 are stored, and 6 is a working memory. Various registers are set in the working memory 6, some of which are shown below.

N register; stores the set value of the number setting switch 3a.

AV register; stores the setting value of the receiving note setting switch 3b.

KON register: Stores the value of the first byte of key information MD.

CK register: Stores the value of the second byte of key information MD.

TCH register; stores the value of the third byte of key information MD.

Reference numeral 7 is a tone generator, and the above key information MD
To generate a tone signal. The tone signal output from the tone generator 7 is supplied to an external sound system (not shown) and is produced as a tone by a speaker (not shown) amplified by the sound system. The above-mentioned MIDI receiving circuit 2, operation panel 3, CPU4,
The program memory 5, working memory 6 and tone generator 7 form a tone generator unit SU.

FIG. 3 is a block diagram showing an electrical configuration of an electronic musical instrument using the two sound source units SU described above. As shown in this figure, the MIDI OUT terminal of the pitch designation device 1 and the MIDI IN terminal of the first sound source unit SU1 are connected, and the MIDI THRU terminal of the sound source unit SU1 and the second sound source unit are connected.
The MIDI IN terminal of SU2 is connected. In this case, the number setting switch 3a of the sound source unit SU1 is "2",
It is assumed that the reception note switch 3b is set to "0", the number setting switch 3a of the sound source unit SU2 is set to "2", and the reception note switch 3b is set to "1".

Next, the operation of each unit when the above-described two sound source units are connected will be described with reference to the flowchart shown in FIG. In this case, when the sound source units are turned on, they start to operate in parallel at the same time. Therefore, the operation explanation will be given centering on the first sound source unit SU1 and regarding the second sound source unit SU2. It will be supplemented when the unit SU1 is described.

Now, when the device is powered on, first, the initialization processing of step S1 is performed, and each register set in the working memory 6 is cleared. In this case, the N register is set to "1" and the remaining registers are set to "0". Next, after the completion of the initialization process, the process proceeds to step S2, and it is determined whether the number setting switch Sa is switched. in this case,
Since the number setting switch 3a is set to "2", the determination result is "YES" and the value "2" is written in the N register. Next time, in this judgment, the number setting switch 3a
If the setting value of 2 is still "2", the determination result is "NO" and the value "2" is held, and if it is other than the value "2", this new value is written in the N register.

Next, after the set value of the number setting switch 3a is written in the N register, the process proceeds to step S3. In step S3, it is determined whether the reception note switch 3b has been switched. In this case, since the reception note switch 3b is set to "0", the determination result is "YES" and the value "0" is written in the AV register. Next time, if the setting value of the reception note switch 3b remains "0" in this determination, the determination result is "NO" and the value "0" is held,
If the value is other than "0", this new value is written in the AV register.

On the other hand, in the sound source unit SU2, since the number setting switch 3a is set to "2" and the reception note switch 3b is set to "1" as described above, the N register is "2" and the AV register is "1". Is written.

Next, in step S4, it is determined whether or not a MIDI signal is supplied from the pitch designating device 1. If the result of this determination is "NO", other processing such as volume and tone color is performed (step S10). If “YES”, the process proceeds to the next step S5. In step S5, the MI output from the pitch specifying device 1
It is determined whether the DI signal is the key information MD. When the result of this determination is "NO", predetermined control is performed based on the supplied MIDI signal (step S7). In the case of "YES", the process proceeds to the next step S6.

In step S6, of the key information MD output from the pitch designating device 1, the first byte data indicating key-on or key-off is written in the KON register, and the second byte data indicating the key code is written in the KC register. Further, data indicating touch information is written in the TCH register. next,
After writing the key information MD in each register, the process proceeds to step S8.

In step S8, the operation [(KC.MOD.N)] modulo the value "2" written in the N register is performed. That is, the value in register KC is divided by the value in register N,
The remainder is required. Then, it is determined whether the remainder matches the value written in the AV register. If this determination result is "NO", step S1
Go to 0, and if "YES", go to next step S9. In this case, for example, if the value of the KC register is "1", [11/2 = 5 remainder 1], and the remainder "1"
And the value “0” in the AV register do not match, the determination result is “NO” and the process proceeds to step S10. If the value of the KC register is "12", [12/2 = 6 remainder 0]
Therefore, the remainder "0" and the value "0" of the AV register match, the determination result is "YES", and the process proceeds to step S9. In this way, the judgment result is “YES” for even key codes (see FIG. 2), and the sound source unit SU1 selects only even key codes, and at the next step S9. To process.

On the other hand, in the sound source unit SU2 as well, the operation [(KC.MOD.N)] modulo the value “2” written in the N register is performed, and the value written in the AV register as the operation result Is determined. In this case, since “11” is written in the AV register, if the value of the KC register is “1”, then [11 ÷
2 = 5 remainder 1], and the remainder “1” and the AV register value “1” match, the determination result is “YES”, and the process proceeds to step S9. Also, if the value of the KC register is “12”, [12/2 = 6 remainder 0], and since this remainder “0” and the AV register value “1” do not match,
The determination result is “NO”, and the process proceeds to step S10. In this way, the judgment result is "YES" for the odd key codes, and the sound source unit SU2 selects only the odd key code and processes it in the next step S9. If only one sound source unit is used, the number setting switch 3a is set to "1", so the value of the register becomes "1", and as shown in the same float chart, calculation using "1" as a modulus Is performed and all key codes are processed in step S9.

Next, in step S9, music generation channel allocation and key-on / off processing are performed based on the values written in the KON register, KC register, and TCH register. After performing these processes, the process proceeds to step S10, and other processes such as volume and tone color are performed as described above. Next, when the processing in step S10 is completed, step S
Returning to 2, the above operation is repeated.

In this way, two sound source units are provided, the number setting switch 3a of each sound source unit is set to "2", and the receiving note switch 3b is set to "0" for the sound source unit SU1 and "1" for the sound source unit SU2. Set each, "2"
Since the calculation modulo is performed, the sound source unit SU
In 1, only even key codes are selected, and sound source unit S
U2 only selects odd keycodes. The tone generator units SU1 and SU2 are adjacent to each other in their key ranges, and in normal performance, the performance regions of the left and right hands are not so far apart, so each tone generator unit has 8 channels of tone generation channels. Assuming (channel), the number of generated musical tones will be 16CH for 2 units.

In the above embodiment, the key code group to be processed by one sound source unit is determined by a calculation using the number of connected sound source units, that is, the value of the N register as a modulus. For example, four sound source units are used and each sound source unit is used. The key group to be processed may be a key group having C to D, D # to F, F # to G #, and A to B as notes.

Further, in the above embodiment, the value written in the N register is set to "2", but the value is not limited to this. Further, it is not necessary to use continuous values.

Further, in the above embodiment, when writing to the AV register,
Although the writing can be performed independently of writing to the N register, the writing may be performed by limiting the range of 0 ≦ AV <N−1. Further, writing to the N register and the AV register may be automatically performed according to the connection state of the sound source unit, or may be controlled from the outside. For example, when a desired value is specified in the N register of the sound source unit closest to the pitch specifying device 1, that unit writes "0" in the AV register, and then the value of the N register and the value of the AV register are set in the subsequent stage. Output to the sound source unit. The subsequent unit adds 1 to the input AV register value and writes it to its own AV register. Then, the value of the N register and the value of the AV register are output to the subsequent unit. In this way, by sequentially sending the value of the N register and the value of the AV register to the subsequent unit, each value of the N register and the AV register of each unit is sequentially set.

[Effects of the Invention] As described above, according to the present invention, the number of generated musical tone channels can be increased simply by increasing the number of connected sound source units without making any changes to the high-pitched sound designation device such as a keyboard. There is an effect that can be done. Further, according to the present invention, it is not necessary to reduce the number of calculation channels of the existing tone generation channels when increasing the number of tone generation channels, so that the sound quality is not deteriorated. Further, according to the present invention, when the receiving condition of the sound source system is designated by the designating means, the receiving condition of the first and second sound source units is automatically set, so that the receiving condition of each sound source unit is set respectively. No need to
The reception conditions of each sound source unit can be set easily.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention, FIG. 2 is a corresponding diagram showing a key applied to the embodiment and a key code for this key, and FIG. 3 is an electrical diagram of the embodiment. FIG. 4 is a block diagram showing an example of dynamic connection, and FIG. 4 is a flow chart for explaining the operation of the same embodiment. 3 ... Operation panel (selection means), 4 ... CPU, 5 ... Program memory (4, 5 is control means), 6 ... Working memory (4-6 detection means), 7 ... Tone generator (musical tone) Generating means).

Claims (1)

[Claims] 1. A sound source system comprising first and second sound source units each having a tone generating means for generating a tone signal on the basis of tone information inputted from the outside, for designating a reception condition of the tone system. The first sound source unit includes: (A) the reception condition of the first sound source unit based on the first reception condition data generated by the specification unit. And (B) only the musical tone information that is input from the outside and that matches the receiving condition set by the first receiving condition setting unit. From the first control means for supplying the second receiving condition data to the second receiving condition data based on the first receiving condition data generated from the designating means. The second sound source unit includes: (a) second reception condition setting means for setting the reception condition of the second sound source unit based on the second reception condition data generated by the reception condition generating means. (B) Of the tone information input from the outside, only the tone information that matches the receiving condition set by the second receiving condition setting means is supplied to the tone generating means by the second control means. A sound source system characterized by that.