JPH0690624B2 - Electronic musical instrument - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to electronic musical instruments.

[Prior Art] Conventionally, some electronic musical instruments have a fill-in function to slightly change the rhythm pattern in order to change the rhythm performance pattern such as percussion instrument sound, and ones that emit percussion instrument sound by keyboard operation by mode switching. Has been realized.

[Problems of Prior Art] However, since the fill-in pattern itself is fixed in the one having the fill-in function, there is a limit to changing the rhythm pattern, and the percussion instrument sound by the keyboard operation is also present. In the mode that emits a sound, while the mode that emits the percussion sound with the keyboard,
I couldn't play normally on the keyboard.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to freely set a performance sound emission pattern of a percussion instrument sound that a performer wants to play, such as intro, fill-in, break, and ending. An object of the present invention is to provide an electronic musical instrument that can be obtained and can play a rhythm sound such as a percussion sound according to the tempo.

In order to achieve the above object, the present invention provides a manual rhythm instruction means for instructing to emit a rhythm sound such as a percussion instrument sound by an extrusion operation in the same case as the keyboard and during automatic rhythm generation. When the manual rhythm instruction means is operated, all but the specific rhythm sound in the automatic rhythm sound is stopped,
The point is that a rhythm sound corresponding to the instruction operation is emitted, and each beat of the music is displayed during the performance of the rhythm sound.

[Structure of Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

<Overall Appearance Configuration> FIG. 1 is a plan view of an electronic keyboard instrument. An accompaniment keyboard 1 and a melody keyboard 2 are provided on the front side in the case of the electronic keyboard instrument, and are adjacent to the melody keyboard 2. A power switch 3 is provided at the end of the electronic keyboard instrument, and a speaker 4 is provided at both ends of the accompaniment keyboard 1 and the melody keyboard 2 on the back side.
4 are provided. An accompaniment mode lever 5, an automatic rhythm operation section 6, a pad rhythm operation section 7, and a melody tone color selection key 8 are provided between the speakers 4 and 4.
The accompaniment mode lever 5 is a one-finger mode in which the chord performance of the accompaniment keyboard 1 is automatically performed with one finger, a finger mode in which the chord is automatically suppressed, and the accompaniment keyboard 1
Is switched to each normal mode for normal melody playing instead of accompaniment. Further, the automatic rhythm operation section 6 is provided with rhythm selection keys 9 for automatic rhythm performance such as lock and disco and a rhythm start / stop key 10 for starting and stopping the automatic rhythm performance.

As shown in FIG. 2, the pad rhythm operation section 7 includes a bass drum pattern switch 11, pad tone color selection switches 12, 13, 14, 15 and pad switches 16, 17, 18,
19 are provided. The pad switches 16 to 19 are used to emit a decaying sound such as a single percussion instrument sound when pressed, and the pad tone color selection switches 12 to 15 change the tone color of the decaying sound produced by the pads to a bass drum or a low bongo. The bass drum pattern switch 11 is used to perform an automatic rhythm performance with the bass drum sound, which is the most basic rhythm, even when the pad attenuation sound is emitted based on the operation of the pad switches 16 to 19. It is a switch. The bar LED 20 shown in Fig. 1 is an LED that lights at the beginning of each bar to indicate the start timing of the bar.
The beat LED 21 is an LED that lights up at the beginning of each beat to indicate the rhythm tempo while the pad rhythm is being played by the pad switches 16 to 19.

The melody tone color selection key 8 is a key for selecting and designating the tone color of the melody tone played on the melody keyboard 2 or the accompaniment keyboard 1.

<Overall Circuit Configuration> Next, the overall circuit configuration of this embodiment will be described.

The switching operation of the pad tone color selection switches 12 to 15 is always scanned and discriminated by the control circuit 22, and the tone color data is stored in the CPU 4
Four N (I) (I = 0 to 0) of the tone color switching register 23 in 0
3) The tone color data preset in each register is compared with the tone color data preset in each of the four O (I) (I = 0 to 3) registers by the previous scanning discrimination, and if there is a change, the new tone color data is It is preset in the corresponding area of the tone color register 24 by the control circuit 22. The tone color switching register 23 is also provided with I flag registers for designating each of four N (I) and O (I).

One end of each of the pad switches 16 to 19 is grounded, and the other end is connected to a high level potential via a resistor. When each of the pad switches 16 to 19 is turned on, the other end side becomes a low level, which is an inverter. The low-level interrupt detection signal is inverted and input via the NOR gate 30 to the interrupt detection circuit 31 of the CPU 40 via the NOR gate 30, and this signal is detected by the control circuit 22 every 2 ms.
When the interrupt detection signal is detected by the control circuit 22,
The 4-bit pad on / off data from the above inverters 26 to 29 is preset in the PAD1 register of the pad on / off register 25, and the pad on / off data in PAD1 is PAD2.
To the pad on / off data PAD3 in PAD2. If the current pad on / off data of PAD1 becomes "1" for the first time with respect to the previous pad on / off data of PAD2 and the previous / next pad on / off data of PAD3, the pad switch
It is determined that 16 to 19 are turned on, the pad on / off data of PAD3 is preset in the pad output register 32, and the pad tone flag of the working register 33 is turned on. Pad switch 16 whose ON state is determined
The tone color data corresponding to 19 to 19 are read out from the tone color register 24 and given to the PCM rhythm tone generator 34, a rhythm tone signal is created, and the pad attenuated tone is output from the sound system 36. During the automatic rhythm performance, the rhythm pattern data from the automatic rhythm sound generation control circuit 35 is sent to the PC.
M is sent to the rhythm sound generator 34, and accompaniment pattern data corresponding to the rhythm pattern data is sent to the musical sound generator.
38, and the rhythm sound and accompaniment sound are emitted and output.

When the pad switches 16 to 19 are turned on, the drum solo flag in the working register 33 is turned on to stop the automatic rhythm performance. At this time, the bass drum pattern switch 11
When is turned on, only the rhythm sound from the bass drum, which is the most basic rhythm performance, is continuously output. When the accompaniment keyboard 1 is operated subsequent to the rhythm performance by operating the pad switches 16 to 19, the output of the pad attenuation sound and the bass drum sound is stopped, and the automatic rhythm performance is restarted. If the operation of the accompaniment keyboard 1 is performed at the fourth beat of the last beat, the output of the pad attenuated sound is stopped until the beginning of the next bar. At this time, the accompaniment key ON flag of the working register 33 is set by the control circuit 22 and the standby process is performed. While the pad attenuated sound is being output, the beat LED 21 is turned on at the beginning of each beat according to the tempo speed, and the tempo of the performance of the music is indicated.

When the pad switches 16 to 19 are turned on and "1" is set in the pad output register 32, "1" is set in the chattering removal flag register 37 accordingly, and the pad output register 32 is cleared to 30 m. Waiting for a second, the chattering process that does not emit the same pad attenuation sound is performed. Further, the key code corresponding to the operation key of the melody keyboard 2 is sent by the CPU 40 to the musical tone generating section 38, a musical tone signal is created and is emitted from the sound system 36.

[Operation of Embodiment] Next, the operation of the present embodiment will be described.

<Pad tone setting processing> By the initialization processing when the power is turned on, the tone switching register 23, the tone register 24, the pad on / off register 2
5, each of the working register 33, the pad output register 32, and the chattering removal flag register 37 has been cleared, and now the bass drum pattern switch 11 is turned on, the pad tone color selection switch 12 is hand clap, and the pad tone color selection switch 13 is When the snare drum and pad tone selection switch 14 is set to open hi-hat and the pad tone selection switch 15 is set to closed hi-hat, CPU4
At 0, the pad tone color designation process shown in FIG. 4 is started. That is, the CPU 40 sets the I flag of the tone color switching register 23 to "0" (step A1), and N (0) designated by this I = 0.
Preset the tone data of the hand clap of the pad tone color selection switch 12 in the register (step A2), O (0)
It is determined whether or not it matches the previous tone color data of (step A3). Since O (0) is still cleared, the two tone color data do not match, and the CPU 40 transfers the handclap sound of N (0) to O (0) (step A4).
The tone color data (0) is transferred and input to the PCMA of the tone color register 24 (step A5).

In this way, the tone color of the pad attenuation tone can be selected from a plurality of tone colors.

Next, the CPU 40 determines that the tone colors have not been set for all the pad tone color selection switches 12 to 15 because the I flag has not reached "3" (step A6) and increments the I flag by one. Set to "1" (Step A
7) The pad tone color setting process is similarly performed for the pad tone color selection switch 13 for which the next snare drum is designated. Then, when the pad tone color setting process is completed for the pad tone color selection switch 14 for which the open hi-hat is designated and the pad tone color selection switch 15 for which the closed hi-hat is designated, I = 3.
U40 ends this process.

After that, when the pad tone color selection switch 15 is switched to, for example, the low bongo, the tone data of the low bongo is preset in the N (0) register and the tone data of the closed hi-hat is preset in O (0). In A3, it was determined that both tone color data did not match,
Row bongo pad tone setting processing is performed (step
A4, A5).

In this way, the tone of the pad attenuation sound can be switched in various ways.

<Pad-on detection processing> Next, when the rhythm selection key 9 is operated to select a desired rhythm and the rhythm start / stop key 10 is turned on,
The rhythm performance will start automatically, and the bar LED2 will appear at the beginning of the bar.
Since 0 is lit, the melody keyboard 2 and the accompaniment keyboard 1 may perform accompaniment in parallel with this.

Then, as shown in the upper part of FIG. 9 (A), when the pad switch 16 is pressed in the middle of the second beat, a low level interrupt detection signal is given to the interrupt detection circuit 31, so that the CPU 40 operates as shown in FIG. It is determined that this signal is present (step B1), and the pad on / off data of "1000" indicating that the pad switches 16 of the pad switches 16 to 19 are turned on is preset in PAD1 of the pad on / off register 25 (step). B2). In this case, PAD2 and PAD3 are both cleared and become "0000". And CPU40 is PAD
2 Take the logical sum of each bit of "0000" and PAD3 "0000",
The exclusive OR of each bit of this logical sum data and PA1 is taken, the logical product of each bit of this exclusive OR data and PAD1 is taken, and the result data is preset to PAD3. (Step B3). As a result, only the bits that are "1", "0", and "0" in PAD1, 2, 3 are "1".
Therefore, in this case, "1000" data is obtained,
When PAD2, 3 has "1", it is not a true pad-on operation, and is excluded, so that an accurate on-operation of the pad switch is determined.

Then, the CPU 40 takes the logical sum of each bit of "1000" of PAD3 and the pad-on data PAD ON from the chattering removal flag register 37 and "0000" in this case, and this logical sum data and the pad-on data "0000". , And each bit is ANDed, and the resulting data is preset in PAD3 (step B4). As a result, the bit for which the pad-on data is "0" after the chattering time has elapsed is only "1" for the bit for which pad operation is newly performed and PAD3 is "1". If "1000"
Data is obtained and chattering processing is performed.

Then, the CPU 40 determines that there is a true pad-on operation because the first bit of PAD3 is "1" (step B5), and the tone color register 24 corresponding to the bit of "1" is detected.
The tone color data of the PCMA bass drum is read out and given to the PCM rhythm tone generator 34 so that the pad attenuation tone is emitted (step B6).

In this way, even during the melody performance, it is possible to output the rhythm sound in the desired pattern of the performance sound.

Next, the CPU 40 sets the pad sounding flag in the working register 33, and the pad on / off register 25 PAD3
The pad on / off data of "1000" in the above is transferred to the pad output register (PAD OUT) 32 (steps B7 and B8), and PAD2
The pad on / off data in PAD3 is shifted to PAD3, and the pad on / off data in PAD1 is shifted to PAD2 (step B
9).

After that, the CPU 40 detects the interrupt detection circuit 31 every 2 msec even if there is no pad on, and if the interrupt signal is not low, the pad on / off data of the pad on / off register 25 PAD2 to PAD3 and the pad on / off data of PAD1 to PAD2. Shift and preset pad on / off data of "0000" to PAD1 (step B10).

<Chattering Process> Next, the CPU 40 determines that the pad-on operation is performed because the first bit of the pad output register (PAD OUT) 32 is set to “1” in step B8 (step C1), Chattering removal flag register (PAD O
N) 37 is set and pad output register (PAD OUT) 32
(Steps C2, C3), wait for 30m seconds after the chattering removal flag register (PAD ON) 37 is set, and then clear the chattering removal flag register (PAD ON) 37 (steps C4, C5). ). As a result, for 30 msec after the pad-on operation,
In step B4 in the figure, chattering processing is performed so that the same pad attenuation sound is not produced.

<Overall processing and automatic rhythm performance / accompaniment control processing> FIG. 7 shows the main overall processing, and the other processing of step D11 in this is the pad tone color setting processing of FIG. 4 described above, and FIG. Pad on detection processing, chattering processing of FIG. 6 and automatic rhythm performance control processing of FIG. 8 which will be described later.

After each of the above processes, the CPU 40 determines that the rhythm start / stop key 10 is turned on so that the automatic rhythm is being played (step D1), and then the pad sound flag is set in the working register 33 in step B7. Therefore, it is determined that a pad-on operation has been performed (step D2), the accompaniment key on flag in the working register 33 is cleared (step D3), and the drum solo flag is set as shown in the middle part of FIG. 9 (A). Stand up (step D4), clear the pad sounding flag (step D5), and perform initialization processing for interrupting the automatic rhythm performance.

Then, based on the flow of the automatic rhythm performance control shown in FIG. 8 in which the CPU 40 is activated for each predetermined time of the rhythm, for example, for each beat, after determining that it is not the beginning of the first beat at present (step E1), the above steps are performed. It is determined that the automatic rhythm performance must be interrupted because the drum and flag is turned on at D4 (step E5), and the beat LED 21 is turned on at the beginning of each beat (step E6).

Thus, after the pad is turned on, the tempo of the performance of the musical composition is indicated by the lighting of the beat LED 21, and based on this, the rhythm performance by each operation of the pad switches 16 to 19 can be performed in accordance with the tempo.

Next, the CPU 40 determines that the bass drum pattern switch 11 is turned on so that the bass drum sound must be emitted in parallel with the pad attenuation sound emission (step E7), and FIG. ) As shown in the lower part, only the bass drum is sounded (step E8), then other processing is performed (step E11), and the process returns to the main flow.

In this way, in this case, even if the bass drum pattern switch 11 is detected to be turned on, the bass drum sound, which is the most basic rhythm, continues to be emitted even during the rhythm performance of the pad decay sound, and the rhythm performance of the pad decay sound is further enhanced. It can be rich and easy to play.

In this case, if the bass drum pattern switch 11 is turned off (step E7), the rhythm sound of the bass drum is not output and the rhythm sound and accompaniment sound are all masked,
As shown in the lower part of FIG. 9 (A), the automatic rhythm performance and accompaniment are completely interrupted.

Thus, during the rhythm performance by the pad attenuation sound, the automatic rhythm performance and the automatic accompaniment or the normal accompaniment corresponding thereto are automatically stopped, and the performance by the pad operation becomes prominent. There is no need to operate the switch to stop the performance.

Then, as shown in the middle part of FIG. 9 (A), when the key of the accompaniment keyboard 1 is turned on in the middle of the third beat, the CPU 40 is in the automatic rhythm performance and the pad sounding flag and the drum solo flag are set. After determining (steps D1, D2, D6), the operation of the accompaniment key is determined (step D7), and it is determined that the fourth beat of the final beat is not entered in the middle of the third beat (step D7). D8), clear the drum solo flag to cancel the interrupted state of the automatic rhythm performance (step D9).

Based on this, the CPU 40 executes the process of the flow of FIG. 8 at the next beat, determines that it is not the beginning of the first beat at present (step E1), and then determines whether the drum solo flag is cleared (step E1). E5), restart the automatic rhythm performance and accompaniment (step E10).

In this way, by simply operating the accompaniment key, the automatic rhythm performance and the accompaniment that had been stopped or played only by the bass drum can be restarted in a perfect form, and therefore the accompaniment for performing the accompaniment. The operation of keys and the operation of restarting the automatic rhythm performance can be performed collectively, and a switch for restarting the automatic rhythm performance and its operation are not required separately.

Further, as shown in the interruption in FIG. 9 (B), when the accompaniment key at the fourth beat of the final beat is turned on after the pad-on operation in the middle of the second beat, the CPU 40 makes one beat after the fourth beat at step D8. It is determined that it is before the eye, and this time, the accompaniment key ON flag of the working register 33 is first set (step D10), and when it becomes the beginning of the first beat of the next measure (step E1), the drum solo flag and the accompaniment key After it is determined that both of the ON flags are ON (steps E2 and E3), the drum solo flag is cleared (step E4), and the automatic rhythm performance and accompaniment are restarted (step E10).

Thus, as shown in the lower part of FIG.
If the accompaniment key is turned on at the beat, the automatic rhythm performance and accompaniment are resumed after waiting until the beginning of the next measure, and the content of the rhythm performance can be changed automatically at the break of the bar with good performance. Further, it is possible to give an instruction to change the rhythm performance in advance without waiting for the timing of the beginning of the bar for changing the content of the rhythm performance.

In the above embodiment, the push-operated pad switches 16 to 19 are used to emit the rhythm sound of the pad damping sound, but a pad switch such as a hitting type pad switch may be used. The operation unit 7 may be separated from the electronic musical instrument body or detachable, and the device for displaying each beat is an LED as well as a liquid crystal display that displays the number of beats such as "1", "2" .... It may be an element or the like.

[Effects of the Invention] As described in detail above, according to the present invention, the manual rhythm instruction means for instructing the sounding of the rhythm sound such as the percussion sound by the pressing operation is integrally provided in the case. Therefore, only the rhythm sound is instructed. Allows you to perform a variety of rhythm performances that the performer wants to achieve. Furthermore, when the manual rhythm instruction operation is performed, only the specific rhythm in the automatic rhythm sound is left, other automatic rhythm sounds are stopped, and the display for each beat is performed. This has the effect that the performance can be performed accurately in accordance with the tempo.

[Brief description of drawings]

FIG. 1 is an overall external view of the electronic musical instrument, FIG. 2 is an enlarged view of the pad rhythm operation section 7, FIG. 3 is an overall circuit diagram of the electronic musical instrument, and FIGS. 4 to 8 are pad tone color setting processing and pad on, respectively. FIG. 9 is a flowchart of a detection process, a chattering process, an entire main process, and an automatic rhythm performance / accompaniment control process.
The figure is a diagram of a time chart showing an example of playing an electronic musical instrument. 1 ... Accompaniment keyboard, 2 ... Melody keyboard, 4 ... Speaker, 6 ... Automatic rhythm operation section, 7 ... Pad rhythm operation section, 10 ... Rhythm start / stop key, 11 ... Bass drum pattern Switch, 12, 13, 14, 15 ... Pad tone color selection switch, 16, 17, 18, 19 ... Pad switch, 21 ... Beat LED, 22 ... Control circuit, 23 ... Tone switching register, 24 ... Tone register, 25 ... Pad on / off register, 31 ... Interrupt detection circuit, 34 ... PCM rhythm sound generator, 35 ... Automatic rhythm sound control circuit, 36 ... Sound system, 40 ... CPU.

Claims (1)

[Claims] 1. A keyboard having a plurality of keys, for instructing to emit a musical tone by operating the keys, and a tone generating means for generating a musical tone based on the instruction for emitting a musical tone from the keyboard. An automatic rhythm performance instruction means provided in the same case as the keyboard for instructing an automatic rhythm performance in accordance with a predetermined rhythm pattern, and an instruction for emitting a rhythm sound by a pressing operation provided in the same case as the keyboard. The automatic rhythm sound is generated based on the manual rhythm instruction means and the automatic rhythm performance instruction from the automatic rhythm performance instruction means, and based on the instruction from the manual rhythm performance instruction means during the generation of the automatic rhythm sound. All of the above automatic rhythm sounds are stopped except a specific rhythm sound, and the specific rhythm sound and the rhythm sound instructed by the manual rhythm instruction means are A rhythm sound generating means for generating a rhythm sound, and a display means for clearly indicating the tempo at each beat of the automatic rhythm performance while the rhythm sound instructed by the manual rhythm instructing means is being generated. An electronic musical instrument characterized by becoming.