JPS5968786A - Electronic musical instrument - 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 an electronic musical instrument that can automatically play a chord as an additive melody when playing a melody, and the present invention relates to an electronic musical instrument that can automatically play a chord as an additive melody. Kl has been designed so that a favorable effect can be obtained.

(9'+ Conventionally, as an electronic musical instrument that can generate additional melodies,
Outstanding keys pressed on the accompaniment keyboard (for example, 02, “2, G”)
2) and note name (0 for C2, E2, G2, EXG
) From among the many notes that are the same, select a note in the lower octave of the key pressed on the melodic keyboard (for example, 06) (05, J, Gs in the case of C6). It is known that it is pronounced along with meloti 1 ((C6)) (e.g.
(See Publication No. 5).

However, with such electronic instruments, no matter which key is pressed on the melodic keyboard, as long as the notes associated with the pressed key are within the key range, the sound will be produced. Therefore, if it is played in the low range of the melody keyboard,
In addition to the sound corresponding to the pressed key, multiple sounds with lower pitches were sounded as additional sounds, which was undesirable in my opinion. In other words, since a large number of very low tones are produced at the same time, it does not sound like a rumbling sound, making it very difficult to listen to.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic musical instrument that prevents auditory discomfort caused by the generation of additional melodies.

The electronic musical instrument according to the present invention is characterized by setting a Meijo limit on the upper tone, and in particular, prohibiting the generation of the upper tone in the bass range. Explain in detail.

FIG. 1 shows an electronic musical instrument according to an embodiment of the present invention, in which the generation of melody sounds, eleventh notes, additional melody sounds, etc. is controlled with the help of a microcomputer. It has become.

The central processing unit (OPU) 10 has a program memory 12 consisting of a ROM (read only memory).
It operates according to the program stored in the panel 14, and the various switches (Sw) on the panel 14, namely the 8-color switch, the function switch (for example, the switch for auto bass chord, auto rhythm, etc.), the number of added notes specifying switch MS2, and The MS3 is installed through the SW (switch) interface 16 (H) to detect the status of each switch, and stores the detected switch information (in a register in the working area 18 consisting of 5 RAM (random access memory)). When there is a change in the switch state, the working area 18 supplies switch information to the LKf interface via the bus 2 (3i).

1, the central processing unit IO scans the upper keyboard for melodies and the lower keyboard for accompaniment using the aperture interface, detects each mysterious state, and stores the detected key information in the working area 18. When there is a change in the key state, the UK is sent from the working area 18 via the bus 20.
Key information is supplied separately for the sound interface 22 and/or the LK sound interface. In this case, if the number of additional notes designation switch MS2 or MB2 is turned on, the central processing unit 10 receives the key-on information from the upper keyboard and the lower keyboard (
(to) (or key-on information from the memory for the lower keyboard) and convolutes it into the register in the working area 18, and then
is supplied to the UK sound interface ρ via the . In addition,
The number of additional notes specifying switches MS2 and MB13 are each 2.
This is for specifying the sound and the sound of the three hairs.

UK tone interface 22 (l-1:, upper keyboard tone generator (UKTG) 3 based on the key information and switch information regarding the lower keyboard from the working area 18
The tone generator 32 supplies the key data UKKD and the color control data UC to the tone generator 32.
An IJ K i signal is formed according to KKD and tone control data UO, and is supplied to a speaker 36 via an output amplifier 34. In addition, the σ interface 22 also supplies the upper tone key data as key data UKKD to the tone generator 32 when the upper tone number constant switch MS2 or MB2 is pressed. An additional material signal is also sent out from 32 as a UK sound signal.

The LK sound interface 24 has a working area 1δ
The key data LKKD and tone control data LO-i are supplied to the lower keyboard tone generator (LKTG) 38 based on the key information and switch information regarding the lower keyboard from the tone generator 38. An LK sound code is formed in accordance with the output signal, and is supplied to a speaker 36 via an output amplifier 34.

Therefore, from the speaker 36, a UK tone (usually a melody tone) corresponding to a key pressed on the upper keyboard is emitted, and an LK tone (usually a chord) corresponding to a key pressed on the lower keyboard 30 is produced.
is sounded, and the number of additional notes is specified by switch MS2 or M.
If you press B2, it will be a two-note or three-note phrase or the original U.
It is pronounced as an additional melody to the K sound.

Figure 2 shows the register layout Vt+ in the working area controller 8.
For the sake of simplicity, we will only discuss the additional sound forming operation here, and omit the description of the other registers as various registers.

UKKDI to UKKD61 are key data registers corresponding to the 61 keys of 02 to C7 on the upper keyboard path, respectively.
The data format of each register is representatively shown for UKKD1. Of 1 byte (8 bits), the most significant bit (MEIB) indicates the key status KS (town if the key is on, uQ/7 if the key is off). The remaining bits are unused.

Also, LKKDI to LKKD61 are 02 to 02 between the lower keyboard.
These are key data registers corresponding to each of the 61 keys of C, and the data format of each register is LKK Dl.
As typically shown in 1 byte (8 bits), the most significant bit (MS B ) indicates the key status KS (11 for key-on, 10 for key-off), and the least significant bit (MSB) (LSB) or note name related flag NF”,
The remaining bits are unused. Here, the pitch name related flag Nb' is 11 when the pitch name is related to the key pressed between the lower keyboards (specifically, when the pitch name is the same), for example, C2, E2, C2. If a key is pressed, this and note name 0. E, C2 All keys that are the same C2, E
2XG2:C3,Ri,,G,;Oa,)G,,G4
The pitch name related flag NF corresponding to . . . is ant 1.

By the way, MELL is used to write the key number of that key when 1st key is pressed on the upper keyboard, and the key number of the lowest key among them when multiple keys are pressed at the same time. It is a register. Also, BF-Q, EF-
1. BF-2 is a buffer register for writing all additional sound key pick-up data, MODE is a data register for specifying the number of additional sounds, and in the case of adding 2 sounds, it is "01" or 1 in hexadecimal.
Fi in the case of 3-tone addition, "02" is 1 in hexadecimal, UK Any Key On flag indicating that any key was pressed on the upper keyboard path, UKAKOi, LKAK
O indicates that any key has been depressed on the lower keyboard 30.
K any key on frac. Note that the key numbers for both the upper keyboard and the lower keyboard 30 are 02 key el, 2.3, split 4, etc. for full duty, and C7 key 61.

Next, the flow of the main routine processing will be explained with reference to FIG.

1. When the power switch (not shown) is turned on, the processing starts, the upper and lower keys UK, LK (1) set menu, and each glaze switch SW of the panel 14 are scanned, and the key is placed in the register of the no-kink area 18. Information and Sui (9) Tutsi information is broken. Then, it is determined whether there is a change in the key state and the switch state, and if there is no change (if NO), scanning and information acquisition are repeated.

Here, if it is assumed that there is a change in the key state or switch state (the determination result is YES), the process moves to a branched process depending on the event type Sw, UK, or LK.

For example, if there is a change in the switch status, UK, L
It is determined whether the K tone switch has changed, and if it is yes, then it is UK.
, LK tone switch information interface 22.24
i to the respective tone generators 32,38.

In addition, if the number of additional notes is specified by switch ME12 or UMS3, the buffer register BP-Q-BP-
2 is fully convolved with ``00'' in hexadecimal, and i, which cleared the same register, is output to the UK sound interface 22 and the generator 32 of BP-Q to BF-2.

As a result, the additional sound key data of the tone generator 32 will be cleared, and if the added sound is not being produced, the non-pronunciation state will continue and continue, and if the additional sound is being produced, it will be rare. Shou ra υ], the pronunciation is stopped.

In the case of a change in the function switch, various program processing and data transfer are performed, but since this is not directly related to this case, we will omit the details. Note that after the processing associated with any of the switch state changes described above, the process returns to the scanning and information capture processing described above.

If there is a change in the upper keyboard σK, the key information (on or off data and key number data) of the key that has changed is input to the iUK sound interface 22. After this,
By checking the topmost bit If of register UKKD l~61, set UK Anykey/or 1 (4), and if yes, set "01" in hexadecimal to Of flag UKAKO.
If it is no N, flag U is set.
Insert roOJ' (f) in hexadecimal into KAKO and put it in the all reset state. Then, when the flag UKAKOi is set, check the most significant bit = 11 of the registers UKKDl~61. Then, it is checked whether the register MODE is not "00" in hexadecimal to determine whether it is the additional sound mode, and if it is not the additional sound mode, the process returns to the above-mentioned scanning and information acquisition process.

When there is a change in the lower keyboard LK, the key information (on or off data and key number data) of the changed key is output for each K sound interface. After this, by checking the most significant bits of registers LKKD1 to 61, it is determined whether the LK Any key is on, and if it is yes, then flag]:, KAKO is r 01 in hexadecimal.
J 'km - put this in the set state, no N
If so, write the flag LKAKOK in hexadecimal format "roo"i to set this'(i-I). Then, if the flag LKAKO is set, then LKKD
The pitch name related flag NFk'l is set for the highest pitch among l to 61 = ts 1 tt and those with the same name. Thereafter, as in the case of the UK branch described above, it is determined whether the additional sound mode is selected, and if it is not the additional sound mode, the process returns to the above-described scanning and information acquisition process.

By the way, in the above-mentioned determination of whether it is in the phrase overtone mode, it is the additional tone mode (the register MODE is r 00 in hexadecimal).
If it is determined that the key data is not J), the process moves to the subroutine shown in Fig. 4 to form additional notes, and if possible, it is formed and stored in the buffer register. Write to E F'-Q~BF-2. Then, the sound key data (i7U
After outputting to the K-sound interface n, the process returns to the scanning and information acquisition process described above.

Next, with reference to FIG. 4, the process of the subroutine for forming additional sounds will be explained.

Input rf)OJkW in hexadecimal to buffer registers EF-Q to EF-2 and clear all of the registers. Then, by checking whether the flag LKAKO is "00" in hexadecimal, it is determined whether all keys of LK are off, and if YES, it is impossible to form a seasonal tone, so the process ends.

If all LK keys are not off, flag UKA40
Checks whether it is "00" in hexadecimal and determines whether all keys of UK are off. If it is YES, it is impossible to form additional tones, so the process ends. In this way, when additional tones cannot be formed because all the LK keys are off or all the UK keys are off, the buffer registers BF-Q to BF
Since -2 has been cleared, no additional sound is generated.

Here, assuming that all keys of LK and UK are not turned off, the key number bootara of the lowest tone of UK is written from the key number register M FjLL to the A register included in the central processing unit 10. Then, subtract 3 from the value of the A register.

This is to make the first additional note iUK three keys lower than the lowest note.

Next, it is checked whether each value in the A register after the subtraction is negative or 0 to determine whether it is outside the UK key range. As a result of this determination, it is impossible to form a short sound outside the UK key range, so no high pitch sound is generated, as described above.

Next, all contents of the A register are transferred to the Y register. This Y register is provided in the central processing unit 10. After this, UK 1ull and L as shown in Fig.
The LK key data is loaded into the A register from the LK key booter register (any one of LKKDI to LKKD51) having an address corresponding to the address value LAD at the boundary with K1IflI plus lfM of the Y register.

Next, the lowest bit tHIM of the A register is used to determine whether the note name related flag NF is 11''. If the result is NO, 1 is subtracted from the value of the Y register and the address is changed to a lower value for all 1 key. Then, check whether the content of the Y register is negative or O to determine whether it is out of the key range. If no, return to the above-mentioned normal LK key data import process, and set the everyone name related flag N F'-month. Repeat the same operation until it is found.If the judgment is yes Y after subtracting 1 from the value of the Y register and it is outside the key range, it will be treated as an additional note that cannot be formed as described above. end.

- When it is determined that the tone name related flag NII' is '1', the key number data is written from the Y register to the buffer register BF-Q. At this time, the key number data that BP-Q% is omitted or the first note is 7.
! The n-note keyte, 7, is evening.

Next, subtract 3 from the value of the LA register that was transferred to the iA register, which is the content of the Y register. This converts the second additional sound to 1+1
This is to make the pitch three keys lower than the added note.

It is determined whether this key is outside the key range in the same manner as described above, and if no, the contents of the A register are transferred to the iY register.

Then, in the same way as described above, all LK key data is loaded into the A register, it is determined whether the note name related flag NF is 11, and if the result is no N, all 1 is subtracted from the value of the Y register, and if it is outside the key range. If the determination is NO, the process returns to the LK key data import process, and the same operation is repeated for the case where NF=11'' is found.

On the other hand, if the note name related flag NF is 11, it is YES Y.
, the value of the Y register is key number 16.
E3 sound (key f y c 17) by checking whether it is greater than
) or more, and if the result is no, the process ends.

As a result, the generation of the second additional temperature 0, which is lower than the E1+ material, is prohibited. Add to this. At this time, BP
, l becomes the second additional tone key data.

Next, it is determined whether the number of additional notes is 3 by checking whether the register MODE is "02" in hexadecimal, and if it is no, the process ends, but if it is yes, the contents of the Y register are transferred to the iA register. Then, subtract 3 from the value of the A register. This is to make the third additional note three keys lower than the second additional note. After this, it is determined whether it is out of the key range in the same way as described above, and no
If so, move the contents of the A register to the Y register. and,
In the same manner as described above, import all LK key data into the A register, determine whether the note name related flag NF is %1, and if the result is no N, subtract 1 from the value of the Y register, and further determine whether it is outside the key range. If the answer is NO, the process returns to the LK key data import process, and the same operation is repeated for the reed where NF=-1 is found.

On the other hand, it is determined that the note name related flag NP is %14.
Assuming that 83 or higher is determined in the same way as described above, if the result is NO, the generation of the third (17) additional sound lower than the B3 sound is prohibited, and if it is YES, the generation of the third (17) additional sound is prohibited from the Y register to the buffer register BP-24C. Write key number data. The key number data written to BF-2 at this time becomes the additional tone key data for the third tone.

As described above, the buffer register B P-〇~BF-
The additional tone key data written in 1 is supplied to the UK tone interface 22 through the additional tone key data output process shown in FIG. In addition to the sound signal, all sound signals corresponding to the phractic sound key data are generated.

As an example, if you press the 06 key in UK and LK'''cC-E
- When pressing a G chord (any octave is fine), if switch MS2 is on, 05 and B5 additional notes will be generated along with C6 note, and if switch MS3 is on, 05, B5, C5 will be generated along with C6 note. An additional sound is generated. In addition, when pressing 0<N in UK and pressing the chord 0-E-G in LK, if switch MS3i is turned on, G3 will be added as an additional note unless the key range restriction means of this invention is provided. , EAX CA are supposed to be pronounced, but the 03 sound is not produced since the present invention prohibits the generation of phrasal sounds lower than the E8 sound. Furthermore, when you press the 02 key in UK and the 0-E-G chord in LK, if the switch MS2i is on, only the Ez note will be sounded as the first additional note, and the second note will be sounded as the second additional note. Since the 02 sound is less than 83, its pronunciation is prohibited. In this case, if MS3i was turned on instead of switch Me2, C2
Is prayer pronounced as less than 83? f- is prohibited, and the Gl sound is not produced because it is outside the key range.

In addition, in the above embodiment, the melody sound and the first kanji sound,
The interval between the first additional note and the second additional note, and between the second additional note and the third additional note was set to 3 semitones, but this could be changed to 5 semitones or 7 semitones to realize oven harmony. is also possible.

Furthermore, the intervals between each sound may be made different from each other.

Furthermore, since the discomfort caused by simultaneous pronunciation in the low range differs depending on the tone, it is possible to make the limit tone higher or lower than the E3 example above, and the setting of this limit tone can be made variable depending on the tone. Good too. Furthermore, the keyboard is not limited to a two-level keyboard, but may be one in which a single-level keyboard is divided into a melody key area and an accompaniment key area.

As described above, according to the present invention, a range limit is set for the seasonal sound, and the generation of low additional sounds is stopped in all prefectures, so low sounds are not emitted simultaneously to many non-hunters, and the auditory sense This provides a more comfortable effect.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an electronic business according to an embodiment of the present invention, Fig. 2 is a diagram showing the arrangement of registers in the working area, Fig. 3 is a flowchart of the main routine, and Fig. 4 is an additional 3 is a flowchart of a subroutine for sound formation. 10...Central processing unit, ah...upper keyboard, (capital)...
・Lower keyboard, 32...Tone generator for upper keyboard, 3
8... Lower keyboard tone generator, MB2. , M.B.
2...Additional tone number designation switch, BP-0 to BF-2.
・Buffer register for additional sound key data. Applicant Nippon Musical Instruments Manufacturing Co., Ltd. Agent Patent Attorney Toshiaki Izawa

Claims (1)

[Claims] 1. A first key range for melody, a second mystery range for accompaniment,
related in pitch to the final note mentioned in the first key range, and
A data generating means for generating all the additional sound key data with the note name for the key pressed in the mystery area, and the 1000-data VC from the first key area, together form a strip and generate the HH additional sound. In an electronic musical instrument, the data generation means includes key data that exceeds a predetermined pitch among the additional sound key data. This electronic musical instrument is characterized by having a range limiter that completely prohibits generation. 2. In the electronic musical instrument according to claim 1,
@Kidata Kabutu + dan is the first additional Shin key data whose pitch is lower than the key pressed in the first otori, and the second additional sound key data which is (1) lower in pitch than this first additional sound key data. Additional tone key data is generated, and the range-limiting flat step stops the generation of key data lower than a pitch set in advance for key data other than the first edition additional tone key data. A chestnut ware that is characterized by the fact that it is shaped like this. 3. In the electronic musical instrument according to claim 1,
The data generating means selects 41 mode selection + stages for selecting either the first mode or the second mode, and the number of added notes is different between when the first mode of reduction and arrangement is selected and when the second mode is selected. It is an electronic musical instrument that is characterized by the fact that it is made by VC to generate key data distributed by MiJ.