JPH0743593B2 - Range converter for electronic musical instruments - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range conversion device for an electronic musical instrument, which is capable of converting the range of each range when dividing the range of an electronic musical instrument having a keyboard. .

"Prior Art" In order to obtain a playing effect similar to that of a multi-tiered keyboard with one keyboard, one keyboard is divided into a plurality of (for example, two) keyboard ranges, and different tone settings are set for each keyboard range. It is known that an electronic musical instrument is made possible by making use of these key ranges.

In this case, a device has been developed which can change the tone range of one of the keys after the key range is divided (Japanese Patent Publication No. 62-62-62).
No. 35118, Jitsukai Sho 53-4925). In such a device, the range of one key range is changed in units of octaves so that the range of the melody performance and the range of the chord performance overlap, or the low temperature range keyboard range allows bass performance in the low temperature range. By changing the range of the octave to the low-temperature octave, the performance effect similar to that of an ordinary multi-step keyboard electronic musical instrument has been achieved.

On the other hand, in an electronic musical instrument, there is also known a device for changing the pitch of the entire key range in semitone steps so that transposition can be performed (JP-A-55-126296).

[Problems to be Solved by the Invention] However, in the conventional range converter, since the above-mentioned octave range conversion and semitone range conversion are used independently, a flexible range considering both transposition and octave range conversion. The conversion could not be done.

The present invention has been made in view of the above-mentioned circumstances, and has a simple configuration, and can perform the range conversion of both the transposition and the octave range arbitrarily, thereby improving the musical range of the electronic musical instrument. It is intended to provide a conversion device.

"Means for Solving the Problem" In order to solve the above problems, the present invention converts the pitch indicated by the supplied pitch information and supplies the converted converted pitch information to the musical tone signal generating means. In a range conversion device for an electronic musical instrument, which generates a tone signal having a pitch corresponding to the converted pitch information, a conversion amount setting operator means for inputting and setting a range conversion amount and a pitch switch (pitch switch). PITCH (+), (-)), instruction means for instructing the first mode or the second mode (bass tone color switch, Sc7 in FIG. 7), and the conversion amount setting operator means in the state of the first mode. And a first storage unit (register TRNS, Sc10 in FIG. 7) that stores the conversion amount input and set as the first conversion amount data representing the conversion amount m in semitones, in the second mode state. The conversion amount setting operator means The second conversion amount data representing the conversion amount input and set by
Storage means (register LKOCT, Sc7 in FIG. 7), means for determining whether the supplied pitch information belongs to a predetermined pitch range (Sd20 in FIG. 8), The pitch indicated by the pitch information is converted and output as converted pitch information, and the pitch indicated by the pitch information is stored in the first storage means regardless of the discrimination result of the discrimination means. The pitch information which has been converted by m semitones represented by the first conversion amount data and which has been discriminated by the discriminating means as belonging to a predetermined range is further stored in the second storage means. It is provided with a range conversion means (Sd13, Sd24 in FIG. 8) for converting n octaves represented by the conversion amount data of 2.

"Operation" The first conversion amount data or the conversion in octave units in which the conversion amount input and set by the conversion amount setting operator means represents the conversion amount m in semitone units according to the first mode or the second mode by the instruction means. The second conversion amount data representing the amount n is stored in the first or second storage means. And
The range converting means for converting the pitch indicated by the supplied pitch information and outputting it as the converted pitch information is a discrimination means for judging whether or not the supplied pitch information belongs to a predetermined pitch range. Regardless of the determination result, the pitch indicated by the pitch information is first
The conversion amount data represented by the conversion amount data is converted into m semitones, and the pitch information determined by the determining means to belong to the predetermined range is further converted into second conversion amount data stored in the second storage means. Convert for n octaves.

In this way, the first range conversion for changing (raising or lowering) the pitch of the entire key range in semitone steps and the second for changing (raising or lowering) the pitch of a predetermined partial key range in octave units. By combining with the range conversion, the key range setting (transposition) corresponding to the performance music can be performed by the first range conversion, and the second range conversion can be performed while the key setting is performed while the key setting is maintained. It enables octave range performance.
Further, in this case, the change amount setting in semitone units in the first range conversion and the change amount setting in octave units in the second range conversion are performed using a common operator, and the setting unit of this common operator is Since it is switched and changed for each semitone or octave according to the mode, the configuration becomes simple.

[Examples] Examples of the present invention will be described below with reference to the drawings.

(1: Configuration of Embodiment) FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, reference numeral 1 denotes an electronic musical instrument, which generates a musical tone control signal according to the MIDI standard (a unified standard for electronic musical instruments) corresponding to the pressing of each key. Here, signals according to the MIDI standard (hereinafter referred to as MIDI signals) will be described. A MIDI signal is a set of 3 bytes. As shown in FIGS. 3 (a) and 3 (b), the first byte indicates the key on / off, the second byte indicates the key code, and the third byte. Indicates touch information. That is, as shown in FIGS. 3 (a) and 3 (b), the first
When the upper 4 bits of the byte is (9) _H , it indicates key-on, and when it is (8) _H , it indicates key-off. The lower 4 bits of the first byte are the communication channel. Also,
"0" is written in the most significant bit of the second and third bytes,
The lower 7 bits indicate a key code and touch information, respectively. Here, the key code is a code indicating the pitch of the key, and the key has the correspondence relationship shown in FIG.

Next, 2 is a receiving circuit for receiving the MIDI signal output from the electronic musical instrument 1, and the received signal is supplied to the CPU 3. CPU3
Is for controlling each part of the apparatus, and is a program memory 4
It operates according to the program in. Reference numeral 5 denotes a register group in which various registers and flags described later are set, and is composed of a random access memory (RAM). Reference numeral 6 denotes a switch group composed of switches for instructing various processes to the CPU 3, and as shown in the drawing, 12 colored switches TNSW0 to TNSW11 and a function switch FUN.
C, pitch switch PITCH (+), (-) and other switches (volume switch, etc.).

The tone color switches TNSW0 to TNSW11 are divided into two groups, the first group is made up of tone color switches TNSW0 to TNSW8, and the second group is made up of tone color switches TNSW9 to TNSW11 for designating a bass tone color. These tone color switches TNSW0 to TNSW11 are configured to be turned on in the pressed state and turned off in the non-pressed state, and in the same group, they are accepted in the late arrival priority. There is. Therefore, two or more switches are not accepted in the same group, and one switch is accepted in each group when the groups are different. Further, the tone color parameters corresponding to the tone colors ("Piano 1", "Piano 2" ... "Chopper bass") designated by the tone color switches TNSW0 to TNSW9 are stored in the tone color parameter table 7, and any one of the tone color switches TNSW Is accepted, the parameter of the tone color is read. In this case, the tone color parameters are provided with identification numbers “0” to “11” corresponding to the numbers of the tone color switches TNSW0 to TNSW11, and when the tone color switch is pressed, the corresponding number is output from the CPU3. , The corresponding tone color parameters are read out. The function switch FUNC is a switch that is pressed in combination with other switches to instruct various functions.
The pitch switch PICH (+) is a switch that is pressed when raising the pitch of a note by one semitone.
PICH (-) is a switch that is pressed to lower the pitch of a note by one semitone.

Next, 8 is a tone generator having eight sounding channels ch0 to ch7, and the key code output from the electronic musical instrument 1 is ch0 to any sounding channel by the CPU3.
When assigned to ch7, the tone generation channel generates a tone signal having a pitch designated by the key code. The tone color parameters read from the tone color parameter 7 are supplied to the tone generation channels ch0 to ch7 via the CPU 3, and a tone signal having a tone color according to this tone color parameter is created. The tone signal output by the tone generator 8 is supplied to a sound system (not shown) and is generated as a tone here. In the above tone generation channels ch0 to ch7, when the key range is divided, the tone generation channels ch0 to ch3 are for the upper key range, and the tone generation channels ch4 to ch7.
Is used for the lower key range.

Here, main ones of the registers and flags in the register group 7 will be described.

Register ASS: A register for instructing allocation of sounding channels, and a numerical value in this register indicates a sounding channel number.

Register KC: A register into which the key code in the MIDI signal is written.

Key code buffer KCBUF (0 to 7): A key code provided for each sounding channel and assigned is stored.

A key code assigned and stored for each sounding channel is stored.

Register SWST: A 16-bit register that stores the state of the switch, and its configuration is shown in FIG. As shown, the 0th to 11th bits are tone color switches TNSW0 to TNS.
Corresponding to W11, the 12th and 13th bits are pitch switch PICH
(), PICH (-), and the most significant bit corresponds to the function switch FUNC. Each of these bits becomes "1" when the corresponding switch is pressed. Also, as with this register, the register is a 16-bit register in which each bit corresponds to a switch.
There are SWOLD and register SWONEV. The register SWOLD stores the previous state of each switch, and the register SWONEV is a register in which the bit of the switch in which the on event occurs is "1". Here, the on event means that the state of the switch changes from off to on.

Register TNST: This register is almost the same as the register SWST, but stores only the states of the tone color switches TNSW0 to SWSW11. Further, a register TNEV is provided as a register for storing the ON event of only the tone color switch.

Register SPLTKC: A register to which a boundary key code at the time of key area division is written. The key written in this register is the highest key in the lower key range.

Flag SPLT: This register is set to "1" in the key range division mode.

The above are the main registers and flags.

(2: Operation of Embodiment) Next, the operation of this embodiment having the above configuration will be described.

(2-1: Main Routine MAIN) FIG. 5 is a flow chart showing the processing of the main routine MAIN in this embodiment.

First, in step Sa1, initialization processing of various registers is performed. For example, flag SPLT, register SWS
T, register SWOLD, is cleared and register SPLT
“54” is written in KC. Thus, the flag SPLT
In the initial state, the whole key range mode is set instead of the spirit mode (divided mode). Also, since "54" is set in the register SPLTKC,
When the spirit mode is first designated, the key range is divided with the F # ₂ key as a boundary. Then step Sa2
Then, the tone color parameter corresponding to the contents of the register TONE is read from the tone color parameter table 7 and supplied to the tone generation channels ch0 to ch7. Step Sa1 to register TONE
Since "0" is written in, this step
The tone color parameters written in the tone generation channels ch0 to ch7 in Sa2 are the tone color parameters of "piano 1" (see FIG. 1). After the processing of step Sa2, the processing of the subroutine MIDI IN is performed. The sub-routine MIDI IN is a sub-routine for performing processing such as tone signal formation based on a MIDI signal supplied from the electronic musical instrument 1, and the details thereof will be described later.

Next, in step Sa3, each switch state of the switch group 6 is loaded into the register SWST. And step
When Sa4 is reached, the logical product of each bit of the register SWSTOLD and the inverted contents of the register SWSTOLD is calculated,
The result is written to the register SWONEV for each bit. Here, since the register SWSTOLD has been cleared by the process of step Sa1, its inverted content becomes (FFFF) _H. Therefore, in step Sa4, register SWS
The logical product of the bits that are "1" among the bits of T is "1". That is, among the bits of the register SWONEV, the bit corresponding to the switch that has the on event becomes “1”. Next, in step Sa5, the register SWS
Write the contents of T to register SWOLD. Therefore, the calculation of step Sa4 described above is thereafter performed between the inverted data of the previous switch state and the new switch state data. Also in this case, the bit of the switch in which the on event occurred is "1" as the result of the logical product. The process of step Sa5 proceeds to step Sa6, and the logical product is obtained between the registers SWONEV and (OFFF) _H. The meaning of this calculation is that of the switches that had an on event
This is a process of extracting the ON event of TNSW0 to TNSW11 (0th bit to 11th bit). The result of this processing is written to the register TNEV. Then proceed to step Sa7,
A logical product is taken between the registers SWST and (0FFF) _H.
The meaning of this calculation is a process of extracting only the on-states of the tone color switches TNSW0 to TNSW11 among the switches whose on-state is detected, and the processing result is written in the register TNST. Next, in step Sa8, it is determined whether the content of the register TNEV is "0". If this determination is "YES", it means that there is no on event in any of the tone color switches TNSW0 to TNSW11. Tone switch TN
If there is an ON event in SW0 to TNSW11, the process proceeds to the subroutine TONE / SW that processes the event. Meanwhile, switch
If the determination of Sa8 is "YES", the process proceeds to step Sa9, and the content of the register SWONEV is ANDed with (3000) _H. By this calculation, the ON events of the pitch switches PITCH (+) and (-) are extracted from the switch ON events, and the calculation result is written in the register PTEV. Then, the process proceeds to the switch Sa10, and the logical product of the content of the register SWST and (3000) _H is taken. Of the switches that are turned on by this calculation, the pitch switch PI
Only the ON state of TCH (+) and (-) is extracted and the result is written in the register PTST. Then switch Sa11
Then, it is judged whether or not the content of the register PTEV is "0". If this judgment is "YES", the pitch switch PITCH
This is the case where there is no on event in either (+) or (-). If there is an on event in any of the steps Sa
If the determination in step 11 is “NO, the routine proceeds to the subroutine PITCHSW for performing the on-event process of the pitch switch. On the other hand, if the determination in step Sa11 is“ YES ”, then the procedure proceeds to step Sa12, and other operations corresponding to the operation of the volume switch and the like are performed. Perform processing and return to the subroutine MIDI IN. After that, the above process is repeated.

(2-2: Subroutine TONE / SW) Next, the processing of the subroutine TONE / SW will be described with reference to FIG. This subroutine TONE.SW is a subroutine that is activated when there is an ON event in any of the tone switches TNSW0 to TNSW11 as described above. In this case, the two tone color switches TNSW may be pressed at the same time in operation, but the processing of the main routine MAIN and the like described above is performed at high speed by the system clock, and human operation has a slight time difference. In processing, the subroutine TONE.SW is reached immediately when the first on-event of the tone color switch is detected.

First, the register i used as a control variable is cleared in step Sb1 shown in FIG.
The process proceeds to Sb2, and it is determined whether or not the value of the i bit of the register TNEV is "1". If this determination is "NO", step Sb3
At 1, the value of the register i is incremented by 1, and the determination in step Sb2 is performed again. After that, the loop consisting of steps Sb2 and Sb3 is circulated until the determination in step Sb2 becomes “YES”. When the determination in step Sb2 becomes "YES", the process exits the above loop and reaches step Sb4, where the register N
Write the value of register i to O. The value written in the register NO by this processing is the same value as the tone color switch number at which the on event occurred. That is, step Sb
By the processing of 2 to Sb4, the bits having the on event are searched in order from the lower bit of the register TNEV, and the number of the tone color switch having the on event is written in the register NO.

Next, in step Sb5, it is determined whether or not the value written in the register NO is "8" or less. This determination is based on whether an on-event has occurred for the tone switches TNSW0 to TNSW8 or the tone switches TNSW9 to TNSW11 that control the bass tone.
Is a process for determining whether or not the event occurs on the bass tone color side. When the determination in step Sb5 is "YES", the process goes to step Sb6,
The logical product of the contents of register TNST and (0E00) _H is calculated,
The operation result is written to the register TSWL. By this calculation, the tone color switches TNSW9 to TNSW11 for indicating the bass tone color
The on event of is extracted. Next, in step Sb7, it is determined whether or not the content of the register TSWL is "0".
When this judgment is "YES", the tone color switches TNSW0 to TNSW
This is the case where any one of 8 is pressed but the tone switches TNSW9 to TNSW11 for bass are not pressed, and the process proceeds to step Sb10. When the determination in step Sb7 is "NO", it means that both of the tone color switches TNSW0 to TNSW8 and the bass tone color switches TNSW9 to TNSW11 are both pressed, and the process proceeds to step Sb13. However, even if both are pressed, there is a time lag in the above operation, so the determination in step Sb7 at the beginning is “Y
ES ”, and proceeds to step Sb10.

On the other hand, if "NO" in the step Sb5, the step Sb
Proceeding to b8, the logical product of the contents of the register TNST and (01FF) _H is calculated and the result is written to the register TSWU. This calculation is a process of extracting the ON state of the tone color switches TNSW0 to TNSW8. Then, in the switch Sb9, the register T
It is determined whether the content of SWU is "0". This judgment is "Y
In the case of "ES", the bass tone color switch is pressed, but the tone color switches TNSW0 to TNSW8 are not pressed, and the process proceeds to step Sb18. If the determination in step Sb9 is "NO", the bass tone color switches TNSW9 to TNSW1
This is the case when any one of 1 and both of the tone color switches TNSW0 to TNSW8 are pressed. However, similarly to the case of the above step Sb7, this determination is initially “YES”,
The process proceeds to step Sb10.

As described above, one of the tone color switches TNSW0 to TNSW8,
Alternatively, if any of the tone color switches TNSW9 to TNSW11 is on, the process goes to step Sb10. Further, even if both tone color switches are pressed together, the determination in the first steps Sb7 and Sb9 is “YES”, and thus the processing also reaches step Sb10 in this case.

In step Sb10, the flag SPLT is cleared and the spirit mode is stopped. Then, in step Sb11, the contents of the register NO are written in the register TONE. The content of the register NO is the number of the switch that has the on event (see step Sb4). Next, in step Sb12, the tone color parameter corresponding to the numerical value in the register NO is read out and supplied to the tone generation channels ch0 to ch7 in the tone generator 8. As a result, the entire key range is set to the tone color corresponding to the tone color switch TNSW pressed. After this processing, it returns to the main routine MAIN. Next, when a tone color switch other than the above is pressed, the same processing is performed again, and the entire key range is set to the tone color corresponding to the newly pressed tone color switch. Also, tone switch TNSW0 to TNS
One of W8 and tone switch TNSW9 to T for bass
When either one of NSW11 is turned on, the following processing is performed.

(B) When the on event of the switch on the base side is detected first.

Steps in the first processing of the subroutine TONE / SW
Sb5->Sb8->Sb9->Sb10->Sb11-> Sb12, and the bass tone in the entire key range, that is, "wood bass",
Either "electric base" or "chopper base" is set. Then, in the second processing of the subroutine TONE SW, in step Sb4, the tone color switch TNS
The number of the switch having the on event among W0 to TNSW8 is written in the register NO. And step Sb5
→ Sb6 → Sb7 is processed, and the determination in step Sb7 is "N
O ”, and the process of step Sb13 is performed.

In step Sb13, the spirit mode is set by setting the flag SPLT to "1". Next, in step Sb14, the value of the register TONE is written in the register TONEL. The register TONEL is a register for designating a tone color in the lower key range. The processing of step Sb14 is performed because the tone data for bass is written in the register TONE in step Sb11 of the first processing of the subroutine TONE / SW, so this is rewritten to the register TONEL for bass tone specification. is there. Next, move to step Sb15 and register
The number in register NO is written to TONE. Then, the process proceeds to step Sb16 to write the tone color parameters corresponding to the numerical values in the register TONE to the tone generation channels ch0 to ch3, and the tone color parameters corresponding to the numerical values in the register TONEL to the tone generation channels ch4 to ch7. This allows pronunciation ch4
~ Ch7 has a bass tone set and sound channel c
General tones other than those for bass are set for h0 to ch3. After this processing, it returns to the main routine MAIN.

(B) When the on event of the tone switch TNSW9 to TNSW11 on the bass side is detected later.

Steps in the first processing of the subroutine TONE / SW
Sb5 → Sb6 → Sb7 → Sb10 → Sb11 → Sb12 are processed, and a tone color other than bass is used for all keys, that is, "piano 1",
Either "strings" or "chorus" is set (see FIG. 1). Then, in the second processing of the subroutine TONESW, in step Sb4, the tone color switches TNSW9 to TNSW1 for the bass for which the on event occurred.
The number 1 is written to register NO. Then, the processing of steps Sb5 → Sb8 → Sb9 is performed, the determination in step Sb9 becomes “NO”, and the processing of step Sb18 is performed. In the switch Sb18, the flag SPLT is set to "1" to set the spirit mode, and the value in the register NO is written in the register TONEL in step Sb19. And register TON
Tone parameter corresponding to the numerical value in EL
Set to ch4 to ch7 (step Sb20). In this case, since the tone generation channels ch0 to ch3 have been written in step Sb11 of the first processing, the tone color for bass is set in the tone generation channels ch4 to ch7 when the processing in step Sb20 ends, and the tone generation channel ch0 To ch3, general tones other than those for bass are set. After this processing, it returns to the main routine MAIN.

(2-3: Subroutine PITCH • SW) Next, the processing of the subroutine PITCH • SW will be described with reference to FIG.

First, in this embodiment, the pitch switch PITCH SW
An outline of processing when (+) and (-) are pressed will be described. First, when the pitch switch PITCH SW (+) or (-) is pressed independently, the pitch of the entire key range is raised or lowered in semitone units each time it is pressed. If the pitch switch PITCH SW (+) or (-) and the function switch FUNC are pressed simultaneously, the pitch of the entire keyboard range is raised or lowered in octave units. Furthermore, if either the pitch switch PITCH SW (+) or (-) and the bass tone color switch are pressed at the same time, the pitch of the lower keyboard range is raised or lowered in octave units. This processing is executed by the subroutine PITCH.SW and the later-described subroutine MIDI.IN. In the subroutine PITCH / SW, the values of various registers used for processing are set.

In step Se1 shown in FIG. 7, the register PTEV is shifted to the right (lower bit side) by 12 bits. Register PT
The EV stores the on events of the pitch switches PITCH (+) and (-) in the 12th and 13th bits (step S
a9), the pitch switch PITC
H (+), (-) on-event data is the 0th bit,
Moved to the first bit. Then move to step Se2,
Shift register PTST to the right (lower bit side) by 12 bits. This process is the same as that of step Sc1, and the ON / OFF data of the pitch switch PITCH is moved to the 0th and 1st bits. Next, in Step Sc3, the register PTE
It is determined whether the 0th bit of V is "1". If this determination is "YES", it means that the pitch switch PITCH (+) is being pressed, and the process moves to step Sc4 and the value "1" is written in the register PTH. On the other hand, when the determination in step Sc3 is "NO", it means that the pitch switch PITCH (-) is pressed, and the process moves to step Sc5 and "-1" is written in the register PTH. After the process of step Sc4 or Sc5, the process goes to step Sc6 to determine whether the most significant bit of the register SNST is "1", that is, the function switch FU.
It is determined whether NC (see Figure 1) is on. If this determination is "NO", the process goes to Step Sc7 and the register SWS
It is determined whether the logical product of the content of T and (0E00) _H is "0". This judgment is based on the tone switch for bass TNSW9 to T
This is a judgment as to whether or not NSW11 is on. And the judgment is "YE
For "S", pitch switch PITCH (+) or (-)
And if any of the bass tone color switches TNSW9 to TNSW11 are both on, and the judgment is "NO", only the pitch switch PITCH (+) or (-) is on. Is.

If "NO" is determined in step Sc7, step S
Go to c8 and see if register PTST is (3) _H , ie
It is determined whether or not the pitch switches PITCH (+) and (-) are simultaneously pressed. If this determination is "YES", the process proceeds to Step Sc9 to clear the register TRNS.
If the determination in step Sc8 is "NO", then step s
Proceeding to c10, the contents of the register PTH are added to the contents of the register TRNS, and the added value is written into the register TRNS again. Next, in step Sc11, it is determined whether or not the absolute value of the register TRNS exceeds "6". If this determination is “YES”, the flow proceeds to Step Sc12, the content of the register PTH is subtracted from the content of the register TRNS, and the subtraction result is again stored in the register TRNS.
Write in. That is, the process of canceling the calculation in step Sc10 is performed. This is because the pitch is raised and lowered (transposition) in semitone units according to the value of the register TRNS, but in this embodiment, the transposition is performed within a range of 6 semitones in both upper and lower parts. Is. After the process of step Sc12 and when it is determined to be "NO" in step Sc11, the process returns to the main routine MAIN.

On the other hand, if “YES” is determined in step Sc7, the process proceeds to step Sc15 and the value of the register PTST is (3) _H.
It is determined whether or not. When this determination is "YES", that is, when both the pitch switches PITCH (+) and (-) are pressed, the routine proceeds to step Sc16 and the register LKOC
Clear T and return. The determination in step Sc15 is “N
If it is `` O, '' proceed to Step Sc17, add the contents of register PTH to the contents of register LKOCT, and add the result to register L
Write in KOCT. Then, in step Sc18, it is determined whether or not the absolute value of the content of the register LKOCT exceeds 2. If this determination is "YES", the process proceeds to step Sc19, and the process of step Sc17 is canceled. This is because the process of changing the pitch of the lower key range in octave units according to the value of the register LKOCT is performed in the range of 2 octaves both above and below. After the processing in step Sc19 and when the determination in step Sc18 is “YES”, the main routine M
Return to AIN.

When the determination in step Sc6 is "YES", the process proceeds to step Sc20 and whether or not the content of the register PTST is (3) _H , that is, both the pitch switches PITCH (+) and (-) are pressed. It is determined whether or not both are pressed, and if both are pressed, the process proceeds to step Sc21 to clear the register OCT. If the determination in step Sc20 is "NO", then step SC
Moving to 22, the content of the register PTH is added to the content of the register OCT, and the addition result is written again to the register PTH. next,
In step Sc23, the absolute value of the contents of register OCT is 2
Or not is determined. This judgment is "YES"
In the case of, the process proceeds to step Sc24, and the process of step Sc22 is canceled. This processing is performed in the same meaning as the processing in step Sc19 described above. Step
After the processing of Sc24 and when the determination in step Sc23 is "NO", the process returns to the main routine MAIN.

(2-4: Subroutine MIDI IN) Next, the subroutine MIDI IN will be described with reference to FIG.

First, whether the MIDI signal of the electronic musical instrument 1 supplied via the MIDI receiving circuit 2 shown in FIG.
The determination is made in step Sd1 shown in the figure. If this determination is "NO", the process proceeds to step Sd2, and control processing (volume and tone color control processing) based on MIDI information is performed. On the other hand, if the determination in step Sd1 is "YES", the flow advances to step Sd3 to capture a MIDI signal for 3 bytes. The information of each byte is key on / off information, key code and touch information as shown in FIG.
And write to TOUCH respectively. Next, in step Sd4, it is determined whether the upper 4 bits of the register ONOFF are (9) _H. If this judgment is "NO", register ONOF
If the information in F indicates key off, step S
Moving to d5, the channel number equal to the key code in the register KC of the key code buffer KCBUF (0 to 7) is written in the register OFF.

Then, in step Sd6, the key code buffer KCBUF having the channel number equal to the contents of the register OFF is cleared, and further the key-off processing is performed by the tone generation channel ch having the number equal to the contents of the register OFF (step Sd4
7). As a result, the key-off process is performed on the key code for which the key-off is instructed. After this processing, the process returns to the main routine MAIN.

On the other hand, if “YES” is determined in step Sd4, it means that the key-on is instructed, and the process proceeds to step Sd8. In step Sd8, the bass tone color switch T
Any of NSW9 to TNSW11 is pressed and the tone switch
It is determined whether or not any of TNSW0 to TNSW8 is pressed. If this judgment is "NO", switch SPLTKC10
Then, it is determined whether the flag SPLT is "1". If this determination is "NO", it means that the spirit mode is not designated, and the flow proceeds to step Sd11 to determine the tone generation channel of the key code. This decision is made by searching for an empty channel in the key code buffer KCBUF (0 to 7), and the decided tone generation channel number is written in the register ASS. Then, in step Sd12, the key code in the register KC is written in the key code buffer KCBUF having the same cipher as the content of the register ASS. Then, the process proceeds to step Sd13, the contents of the register KC, the register
The contents of TRNS and the contents of register OCT are multiplied by 12, and the result is added to the register KEY. The key code written in the register KEY by this process is the pitch of the key code in the register KC and the register OCT.
Increases (or decreases) in octaves according to the contents of
In addition, it is raised (or lowered) in semitone steps according to the contents of the register TRNS.

Next, in step Sd14, it is determined whether the content of the register KEY is 0 or less. If this determination is "YES", the flow proceeds to step Sd15, the key code in the register KEY is rewritten to one incremented by one octave (+12), and the determination in step Sd14 is performed again. This process is continued until the determination in step Sd15 becomes "NO". In this embodiment, the processing of steps Sd14 and Sd15 does not handle a value smaller than "1" as a key code (see FIG. 2), but a numerical value of "0" or less is calculated by the calculation of step Sd13. This is because it may be done. Then, when a numerical value of "0" or less is calculated, the contents of the register KEY have a relation of the key code and the octave, and are "0".
Is converted into a key code with the lowest pitch exceeding the range (steps Sd13, Sd14). Next, in step Sd16, the register K
It is determined whether the contents of EY are 128 or more. This judgment is "Y
When it is "ES", move to the register Sd17 and rewrite the key code in the register KEY with one octave lower (-12). Then, the process of step Sd16 is performed again. This process is continued until the determination in step Sd16 becomes "NO". This processing is performed because a value larger than "128" is not handled as the key code, but a numerical value of "128" or more may be calculated by the calculation in step Sd13. In this case, the content of the register KEY is converted into a key code having the highest pitch of "127" or less and having the octave relationship with the key code (step Sd
16, Sd17).

On the other hand, when the spirit mode is designated, the result of the determination in step Sd10 is "YES", and the process proceeds to step Sd20. In this step Sd20, it is judged whether or not the key code fetched in step Sd3 is larger than the key code in the register SPLTKC. This process is a process of determining whether the captured key code should be sounded in the upper key range tone color or in the lower key range tone color. Then, in the case of "NO", the flow proceeds to step Sd21, the tone generation channel is determined in the key code buffer KCBUF (0 to 3), and the tone generation channel number is written in the register ASS. After that, the processing of steps Sd12 to Sd18 described above is performed, and the sound generation processing is performed in any of the sound generation channels ch0 to ch3. Here, since the tone generation channels ch0 to ch3 are set to the tone color for the upper key range in the above-described processing of steps Sb12 and Sb16, the key code is tone-generated with the tone color for the upper key range.

Next, if “YES” is determined in step Sd20,
In step Sd22, the tone generation channel number is determined by the key buffer KCBUF (4 to 7), and the number is written in the register ASS. Then, in step Sd23,
Key buffer KCB indicated by the number in register ASS
Write the key code to UF. Then, step Sd24
Then, the calculation shown in the figure is performed. This calculation is almost the same as the calculation in step Sd13 described above, except that the sum of the contents of the register OCT and the register LKOCT is multiplied by 12. As a result, in step Sd24, the key code written in the register KEY becomes larger or smaller by a value obtained by multiplying the contents of the register LKOCT by 12 as compared with the case of step Sd13. After this processing, steps Sd14 to Sd described above are performed.
The process of 18 is performed, and the tone generation process is performed in step Sd18. This tone generation processing is performed by any of tone generation channels ch4 to ch7. And pronunciation channel ch4
For to ch7, since the tone color for the lower key range is set by steps Sb16 and Sb20 shown in FIG. 6, the key code is sounded with the tone color of the lower key range. Next, a case where the determination in step Sd8 is “YES” will be described. In this case, the key code is supplied from the electronic musical instrument 1 (see the switch Sd1), and the tone color switches TNSW0 to TNSW
This is the case where both 8 and any of the tone switches for bass TNSW9 to TNSW11 are pressed. In this case, proceed to step Sd25G and register K in register SPLTKC.
Write the key code in C. As a result, the register SPLT that was set to "54" (F # ₂ sound) in the initial state
The contents of KC are rewritten. Then, in step Sd26, the contents of the register TONE and the register TONEL are exchanged. That is, the tone colors of the upper and lower keyboard ranges are exchanged. Then, proceed to step Sd27, and sound channel
The tone color parameters specified by the contents of the register TONE are supplied to ch0 to ch3, and the tone color parameters specified by the contents of the register TONEL are supplied to the tone generation channels ch4 to ch7. Next, at step Sd28, "7" is written in the register ASS. As a result, the sound channel ch7 is designated as the channel to be sounded. Then, the processing of steps Sd23, Sd24 and steps Sd14 to Sd18 is performed, and the sound of the key code in the register KC in which the content of the register SPLTKC is rewritten is generated. Since this key code is generated by the sound generation channel ch7, the tone color is in the lower key range. By the above processing, a key which becomes a boundary in the spirit mode is newly set and the key is sounded, so that the pitch and tone color can be monitored. Further, although the tone colors of the upper key range and the lower key range are interchanged by the process of step Sd26, by performing the process of step 26 again, the tone colors are interchanged and the basic tone color can be set.

(3: Relation with operation) The above is the operation of this embodiment. Next, the relationship between the operation of each switch by the operator and the above operation will be described.

Normal performance Press one of the tone switch TNSW0 to TNSW11. As a result, the processing of steps Sb10 to Sb12 shown in FIG. 6 is performed, the spirit mode is released (step sb10), and the tone color corresponding to the tone color switch pressed is set in the entire key range. Then, when the electronic musical instrument 1 is played in this state, the key code is output, whereby the eighth
The processing of steps Sd11 to Sd18 shown in the figure is performed to generate a musical tone corresponding to the performance. Tone switches TNSW0 to T
If the NSW11 is not operated at all, the initial tone "Piano 1" will be set to the entire keyboard range.

Setting of Spirit mode When any one of the tone color switches TNSW0 to TNSW8 and any one of the tone color switches TNSW9 to TNSW11 are pressed, the subroutine TONE / SW shown in Fig. 6 is executed twice, and the spirit mode is set. At the same time (step Sb13, step Sb18), the tone color is set for each of the upper and lower key ranges (steps Sb12, Sb16, Sb20). Then, when the electronic musical instrument 1 is played by releasing the tone color steps TNSW0 to TNSW11, the key code is assigned in step Sd20 of FIG. 8, whereby the tone color different tone processing is performed for each key range. .

Changing the key at the boundary of the divided key range Tone switch TNSW0 to TNSW8 and tone switch
While pressing any one of TNSW9 to TNSW11, press any key of the electronic musical instrument 1. As a result, the processing of steps Sd8 → Sd25 in FIG. 8 is performed, and the pressed key code is written in the register SPLTKC. As a result, the key that becomes the boundary of division is changed. Furthermore, by the processing of step Sd26, the tone colors of the upper and lower keyboard ranges are exchanged. To return this, for example, select the tone color switch TNSW0 to T
With the NSW11 pressed state as it is, the electronic musical instrument 1 again
Just press the same key. As a result, the process of the switch Sd26 is performed again, and the tone color setting of each key range is restored.

Transposition and octave change When the pitch switch PITCH (+) is pressed, the processing of the subroutine PITCH-SW shown in Fig. 7 is started and step Sc10
The value of the register TRNS is increased by the processing of. And
When the electronic musical instrument 1 is played, the value of the register TRNS is added to the key code in the register KC by the processing of step Sd13 or step Sd24 in FIG. 8, and transposition is performed according to the value. When the pitch switch PITCH (-) is pressed, the increase is the same as the above except that the increase is decreased. In this way, transposition is performed in semitone units.

Also, with the pitch switch PITCH (+) or (-),
When the function switches FUNC are pressed simultaneously, the process of step Sc22 shown in FIG. 7 is performed, and the value of the register OCT increases (decreases). When the electronic musical instrument 1 is played, the step Sd shown in FIG. 8 is performed for the key code of the played key.
The processing of 13 is performed, and the pitch of the entire key range is changed in octave units when not in the spirit mode.

When both the pitch switch PITCH (+) or (-) and the bass tone color switch are pressed, the process of step Sc7 shown in FIG. 7 is performed, and the content of the register LKOCT is increased or decreased. When the lower key range of the electronic musical instrument 1 is played, the processing of step Sd23 shown in FIG. 8 is performed on the key code of the played key, and the pitch is changed in octave units. In this case, in the spirit mode, the upper key range is changed in pitch by octave by the processing of the spirit mode Sd13. Therefore, the pitch is changed in octave units for each key range.

(4: Modification of Embodiment) The allocation and allocation method of the upper and lower key ranges of the sounding channel are not limited to those shown in the embodiment,
Any other method can be used.

The tones to be divided in the embodiment are tone switches TNSW.
One tone from 0 to TONE8 and tone switch TONE9 to TONE1
Combinations are limited, such as 1 tone from 1
The division may be performed by combining any two timbres. It is possible to specify other ranges for the pitch octave changing and transposing ranges, and the specifying method is not limited to the operation of the embodiment, and can be performed by a separate operation using other switches or the like. It is also possible to do so.

[Advantages of the Invention] As described above, according to the present invention, the first pitch conversion for changing the pitch of the whole key range in semitone units and the pitch of a predetermined partial key range in units of octave. By combining with the second range conversion, the key setting (transposition) corresponding to the musical piece is performed by the first range conversion, and then the specific key is converted by the second range conversion while maintaining this key setting state. Since the range of the range can be arbitrarily changed in units of octaves, it is possible to freely set the range of music suitable for the musical piece to be played on a single-stage keyboard, and the degree of freedom of performance is improved. Moreover, in this case, since the change amount setting in semitone units in the first range conversion and the change amount setting in octave units in the second range conversion are performed using a common operator, the configuration can be simplified. .

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention,
FIG. 2 is a diagram showing the correspondence between key codes and pitches used in the same embodiment, FIG. 3 is a diagram showing the format of MIDI signals, and FIG. 4 is the function of each bit of the 16-bit register in the same embodiment. FIG. 5 is a flow chart showing the main routine processing of the same embodiment, and FIGS. 6 to 8 are flow charts showing the processing of the subroutine of the same embodiment. 1 ... Electronic musical instrument, 3 ... CPU (central processing unit), 4 ...
Program memory, 5 ... Registers, 6 ... Switches, 8 ... Tone generator, TNSW0 to TNSW11 ... Tone switches, FUNC ... Function switches, PITCH
...... Pitch switch.

Claims (1)

[Claims] 1. The pitch indicated by the supplied pitch information is converted,
A range converter for an electronic musical instrument, in which the converted converted pitch information is supplied to a musical tone signal generating means to generate a musical tone signal having a pitch corresponding to the converted pitch information. Conversion amount setting operator means for inputting and setting the amount, instruction means for instructing the first mode or the second mode, and the conversion amount input and set by the conversion amount setting operator means in the state of the first mode. First storage means for storing as first conversion amount data representing the conversion amount m in semitones, and in the state of the second mode, the conversion amount input and set by the conversion amount setting operator means in octave units. The second stored as the second conversion amount data representing the conversion amount n
Storage means, determining means for determining whether or not the supplied pitch information belongs to a predetermined pitch range, and converting the pitch indicated by the supplied pitch information to obtain converted pitch information. The pitch indicated by the pitch information is converted into m semitones represented by the first conversion amount data stored in the first storage unit, regardless of the determination result of the determination unit. At the same time, the pitch information determined by the determining means to belong to the predetermined tone range is further converted by n octaves represented by the second conversion amount data stored in the second storage means. A range conversion device for an electronic musical instrument, comprising: a conversion unit.