JPH06100915B2 - Electronic musical instrument - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic musical instrument capable of playing various rhythms.

[Prior Art] Conventionally, electronic musical instruments capable of performing various rhythm performances such as automatic rhythm performance and manual rhythm performance have been developed.

However, when performing a manual rhythm performance in the electronic musical instrument as described above, the tone color of the rhythm sound that can be generated is fixed with respect to the operators for manual rhythm performance, so-called pads. However, since the timbre of the rhythm sound can be selected, the rhythm performance performed by the performer is limited, and it is difficult to perform a rhythm performance that is musically preferable.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide an electronic musical instrument that allows a performer to perform a more musically preferable rhythm performance.

[Main Points of the Invention] That is, the main point of the present invention is that the tone color of the rhythm sound to be emitted by the instruction means can be selected.

[Structure of Embodiment] An embodiment of the present invention will be described below in detail 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 fingered mode in which chords are automatically suppressed, and the accompaniment keyboard 1 is not used for accompaniment but a normal melody. The mode is switched to each of the normal modes for playing. 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 preset in the four N (I) (I = 0 to 3) registers of the tone color switching register 23 in the CPU 40. Then, it is compared with the tone color data preset in 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 controlled by the control circuit 22. Preset in 24 corresponding areas. Tone switching register
The 23 is also provided with an I flag register 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 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 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 are read from the tone color register 24 and given to the PCM rhythm tone generator 34, a rhythm tone signal is created, and the pad damping 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 subsequently to the rhythm performance by operating the pad switches 16 to 19, the output of the pad attenuation sound is replaced and the automatic rhythm performance is restarted. The output of the pad attenuation sound is stopped by the accompaniment keyboard 1
If the operation is performed when the fourth beat of the final beat is entered,
Wait until the beginning of the next bar. At this time, the control circuit 22
Thus, the accompaniment key ON flag of the working register 33 is set 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, since the I flag has not reached "3", the CPU 40 determines that the tone color setting for all the tone color selection switches 12 to 15 has not been completed (step A6), and I
The flag is incremented by 1 to "1" (step
A7), 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 resulting 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 (step D4). The pad pronunciation flag is cleared (step D5), and the initialization process for interrupting the automatic rhythm performance is performed.

Then, the CPU 40 determines, for example, that the current beat is not at the beginning (step E1) based on the flow of the automatic rhythm performance control shown in FIG. In step D4, it is determined that the automatic rhythm performance must be interrupted because the drum solo flag is turned on (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 middle part of FIG. 9 (B), when the accompaniment key at the fourth beat of the last 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 the 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 attenuation sound, but a pad switch such as a tapping type pad switch may be used. The accompaniment sound to be stopped during sound output may be manual accompaniment as well as automatic accompaniment sound, and the rhythm sound output during pad attenuation sound output may be a rhythm sound other than the bass drum.

Further, although the pad switches 16 to 19 are provided in the same case as the keyboard in the above embodiment, an input device such as a pad switch is provided externally and electrically connected to an electronic musical instrument (not limited to a keyboard musical instrument). To realize a similar device.

[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. Allows you to perform a variety of rhythm performances that the performer wants to achieve. Furthermore, when a manual rhythm instruction operation is performed, only a specific rhythm in the automatic rhythm sound is left and other automatic rhythm sounds are stopped.
It is easy to understand the timing of the rhythm. Further, since the tone color of the manual rhythm sound can be selected, a more musically preferable rhythm performance can be performed.

[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 manual rhythm instruction means, the tone color selection designation means for individually designating and designating the tone color of each rhythm sound emitted by the instruction of the manual rhythm instruction means, and the tone color selection designation means. Tone color data storage means for respectively storing tone color data corresponding to the tone color of each rhythm sound emitted by the instructions of the plurality of manual rhythm instruction means, and the automatic rhythm The automatic rhythm sound is generated based on the instruction of the automatic rhythm performance from the performance instruction means, and a specific one of the automatic rhythm sounds is generated based on the instruction from the manual rhythm performance instruction means during the generation of the automatic rhythm sound. Rhythm sound generating means for stopping all but the rhythm sound and generating only the rhythm sound of the timbre corresponding to the timbre data read by the timbre data reading means and the specific rhythm sound according to the instructions of the plurality of manual rhythm designating means. An electronic musical instrument characterized by comprising: