JPH0439080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This description relates to an electronic musical instrument that aims to improve the performance effect when playing a musical piece consisting of multiple parts.

Electronic instruments such as electronic organs or electronic organs with an automatic performance function usually have multiple parts (melody, chord, bass, etc.)
A song consisting of will be played. This type of electronic musical instrument has a musical tone signal forming channel for each part, and when a song consisting of multiple parts is played (played by the keyboard, automatically, or a combination of these), the musical tones of each part are but,
The sound is generated and generated by a corresponding musical tone signal forming channel.

By the way, in the above-mentioned conventional electronic musical instruments, the volume of each part is adjusted uniformly for each part by a volume provided in a musical tone signal forming channel for each part. The musical tone signals formed by each of these channels are
It is now mixed and output. Therefore, in such electronic musical instruments, if the same note, that is, a note with the same note name or a note with the same note name and octave, is formed simultaneously in different parts (for example, a melody and a chord), the main There was a problem in which the sound of certain parts (for example, melody) became inconspicuous.

In view of the above-mentioned circumstances, this invention provides that even when the same sound is formed simultaneously in different parts,
To provide an electronic musical instrument in which the sound of the main part does not become inconspicuous, that is, the sound is produced effectively. A feature of the present invention is that when the sounds of a specific part (for example, a chord) and the sounds of another part (for example, a melody) become the same at the same time, the volume of the sound of the specific part is reduced. be.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

The figure shows the configuration of an electronic musical instrument that is an embodiment of the present invention.

First, an outline of the electronic musical instrument shown in this figure will be explained. This electronic musical instrument has an automatic performance function, and can play a musical piece consisting of multiple parts by keyboard performance, automatic performance, or a combination thereof. When the performance as described above is performed, key codes representing the sounds of each part are sequentially outputted from the key code generator 1 and supplied to the channel assignment circuit 2. This channel assignment circuit 2
input each of the above key codes sequentially, and send these key codes to musical tone signal forming channels 3 _-1 to _{3 -10.}
(musical tone forming means) and outputs it as a time-divided key code KC. In this case, the channels 3 _-1 to 3 _-4 are melody, and the channels 3 _-5
corresponds to the arpeggio, the channel _3-6 corresponds to the bass, and the channels _3-7 to _3-10 correspond to the chord parts. Also, channel 3 corresponding to the chord
_-7 to 3 _-10 are configured to reduce the volume by the corresponding amount when forming a sound with the same pitch name as the sound formed by the other channels 3 _-1 to 3 _-6 .
The musical tone signals formed by these channels 3 _-1 to 3 _-10 are added for each part, and the added signals are mixed and supplied to an amplifier 4, and the output of this amplifier 4 is used to output a speaker. 5 is now driven.

Each part of this electronic musical instrument will be explained in detail below.
The key switch circuit 6 (input means) has key switches provided in one-to-one correspondence with each key of each keyboard (not shown) such as the upper keyboard, lower keyboard, foot keyboard, etc. of this electronic organ. That's what happens. In addition, the performance data storage/readout circuit 7 (input means)
For example, performance data input from a recording medium such as a magnetic tape through a reading device (both not shown) (notes constituting each part such as melody, obligado 1, obligado 2, albejillo, bass, chord, etc.) It has a memory for storing pitch data and note length data arranged in the order of progression of the piece of music) or performance data inputted via the keyboard, and when automatic performance is commanded, the data is stored from this memory. The apparatus is equipped with a circuit that reads each pitch data in the performance data in parallel for each part and sequentially in the order of progression of the music according to the note length indicated by the corresponding note length data. On the other hand, the automatic performance part selector 8 is a circuit that selects and instructs which part among melody, obbligado 1, obbligado 2, albejillo, bass, and chord is to be automatically performed during automatic performance. The pitch data register circuit 9 has registers for at least the number of parts, and among the pitch data for each part outputted by the performance data storage/readout circuit 7, the automatic performance part selector 8 indicates Only those that correspond to the part are temporarily stored in the corresponding registers.

The key code generator 1 scans each key switch in the key switch circuit 6 at a predetermined period to read the state of each key switch, and generates a key code indicating the pressed key (a note code indicating the note name of the pressed key, and a note code indicating the note name of the pressed key). A code consisting of an octave code indicating the octave to which the same key belongs and a keyboard code identifying the keyboard to which the same key belongs is created and outputted sequentially and periodically.In addition, during automatic performance, each register of the pitch data register circuit 9 is generated. is scanned to read out each pitch data stored in these registers, and the same key code as above is created by adding the identification code of the part identified from the scanning order of the registers to these data, and sequentially repeating the pitch data stored in these registers. output. The key code output from this key code generator 1 is supplied to a channel assignment circuit 2. This channel allocation circuit 2 operates in synchronization with a channel timing signal generator 10, which will be described later, and holds each of the key codes supplied from the key code generator 1, and each of the held key codes. , musical tone signal formation channel 3 _-1 ~ 3 _-1
0 is output as a time-divided key code KC in channel order according to the part. in this case,
If the key codes supplied from the key code generator 1 correspond to melody, obbligado 1, and obbligado 2 in the upper keyboard or automatic performance, the channel assignment circuit 2 assigns these to channels 3 _-1 to 3. At the time division timing assigned to channel _{3 -4} , or if the key code supplied from key code generator 1 corresponds to an albegillo during automatic performance, then at the time division timing assigned to channel 3 _-5 . , if it corresponds to the bass in the foot keyboard or automatic performance, it will be set to the time division timing assigned to channels 3 _{- 6} , and if it corresponds to the chords in the lower keyboard or automatic performance, it will be set to channel 3. Each is output as a key code KC at the time division timing assigned to _-7 to 3 _-10 . In addition,
A key-on signal KON (pulse signal of "1") indicating a key-depressed state is added to this key code KC. On the other hand, channel timing signal generator 1
0 is a timing signal CH ₁ to CH ₁₀ (“1” synchronized with the key-on signal KON) for causing each key code KC to be taken into the corresponding one of the channels 3 _-1 to 3 _-10 . pulse signal)
occurs. In this case, for example, when the channel allocation circuit 2 outputs the key code KC to be taken into channel 3 _-1 , the timing signal CH ₁
is output. And each of these timing signals
The timing signals CH ₇ to _{CH 10} among CH ₁ to _{CH 10} are ORed by the OR gate 11, and the signal LKCH
is created.

Musical sound signal formation channel _3-1 is a melody or obbligado played on the upper keyboard or automatically played.
1. A channel for forming one of the one or more sounds simultaneously specified in 2. A register 12 for capturing and temporarily storing the key code KC by the timing signal CH ₁ , and a register 12 for temporarily storing the key code KC. A musical tone signal forming circuit 13 adds tone color etc. to form a musical tone signal of the pitch specified by the captured key code KC, and adds this musical tone signal to musical tone signals of other channels _3-2 to _3-4 . It has a resistor 14 for. Musical tone signal formation channel 3
_-2 to _3-4 are configured in the same manner as channel _3-1 above, but each register (not shown) is configured to receive a key code KC by timing signals _CH2 to _CH4 . It's getting old. and,
The musical tone signals formed by the channels 3 _-2 to 3 _-4 are added together and then supplied to the amplifier 4 via a variable resistor 15 for adjusting the volume of the melody.

The musical tone signal forming channels _3-5 to _3-6 are configured almost the same as the channel _3-1 , and their registers (not shown) contain the timing signal _CH5.
The corresponding key code KC is now captured by CH ₆ . The outputs of these musical tone signal forming channels 3 _-5 to 3 _-6 are then sent to the amplifier 14 through the variable resistor 16 for adjusting the volume of the albegillo and the variable resistor 17 for adjusting the volume of the base, respectively.
It is now being supplied to

The musical tone signal forming channel _3-7 is a channel for forming one or more tones simultaneously specified in a chord played on the lower keyboard or automatically played. In this channel _3-7 ,
The register 18 receives and temporarily stores the key code KC in response to the timing signal _CH7 . The key code KC stored in this register 18 is supplied to the musical tone signal forming circuit 19, and is also supplied to the comparator 2.
0 (same sound detection means). Comparator 20
compares the note code of the key code stored in the register 18 and the note code of the key code KC output from the channel allocation circuit 2, and if they match, outputs a "1" signal from the EQ terminal. The signal of this EQ terminal is the AND gate 21
, the key-on signal KON included in the key code KC and the inverted signal of the signal LKCH by the inverter 22 are ANDed. Therefore, the output of this AND gate 21 is assigned to this channel 3-7 in the note code (code indicating note name) of the key code KC assigned to channels _{3-1 to 3-6} . key code KC
If there is a note code equal to (that is, the same note is detected), a pulse-like "1" signal is generated. This "1" signal is supplied to the set input terminal S of the RS flip-flop 23, and puts the flip-flop 23 into the set state at the rising edge of the signal. The signal at the set output terminal Q of the RS flip-flop 23 is supplied to the data input terminal D of the D-type flip-flop 24. Further, a timing signal CH ₁₀ is supplied to the reset input terminal R of the flip-flop 23 (a terminal that performs a reset upon the fall of a signal) and the trigger input terminal T of the flip-flop 24. Therefore, the said RS
The flip-flop 23 receives timing signals CH ₁ ~
From the time when the same tone is detected as described above in the period corresponding to CH ₆ , the timing signal CH ₁₀
It remains in the set state until the falling edge of the signal. Then, due to the arrival of the timing signal CH ₁₀ , the RS flip-flop 23 is transferred to the D-type flip-flop 24.
The signal state of the output terminal Q of is loaded. next,
The signal at the set output terminal Q of this D-type flip-flop 24 is inverted by an inverter 25 and supplied to a control terminal C of a gate circuit 26 (volume control means). This gate circuit 26 connects the output terminal of the musical tone signal forming circuit 19 and this channel 3.
_-7 is connected in series with the resistor 29 of the resistors 28 and 29 connected in parallel between the output terminal 27 and the input terminal I when a "1" signal is supplied to the control terminal C. When the output terminal O is short-circuited and a "0" signal is supplied to the control terminal C, the input terminal I
and the output terminal O are disconnected. Therefore, the musical tone signal outputted from the musical tone signal forming circuit 19 is transmitted through the D-type flip-flop 2.
When D-type flip-flop 24 is in the reset state, it is output from the output terminal 27 through resistors 27 and 28 in parallel (i.e., at normal volume), while when the D-type flip-flop 24 is in the set state, it is output only through resistor 28 (i.e., at normal volume). (at a lower volume than in the above case) is output from the same output terminal 27.

In addition, musical tone signal forming channels _3-8 to _3-10 are also
Although the configuration is almost the same as the channel _3-7 , timing signals _CH8 to _CH10 are supplied to each register in these channels _3-8 to _3-10 as a signal for capturing the key code KC. There is.

And these musical tone signal forming channels 3 _-7 ~
After the respective outputs of _3-10 are added, they are supplied to the amplifier 4 via a variable resistor 30 for adjusting the chord volume.

Therefore, according to the embodiment shown in this figure,
During keyboard performance, automatic performance, or a combination of these, if sounds with the same note name are specified simultaneously for a chord and another part (for example, a melody), the volume of the chord will be changed. As a result, the sounds of the other parts (for example, the melody) become noticeable, and the performance effect is improved. In this embodiment, each channel 3 _-7 corresponding to the chord
Between ~ _3-10 and other channels _3-1 ~ _3-6 ,
The same note was detected by comparing only the note chord of the key code KC, but if both the note chord and octave chord were compared separately, it would be possible to identify the note name and The volume of a chord can be reduced only when notes in the same octave are specified. Further, in this embodiment, only the channels _3-7 to _3-10 corresponding to the chords are provided with a same-tone detection means consisting of a comparator 20, etc., and a volume control means consisting of a gate circuit 26, etc., so that only the volume of the chord is provided. However, both of these means are connected to the musical tone signal forming channel _3-5 or the musical tone signal forming channel 3.
_-6 or provided in an appropriate combination of both channels 3 _-5 to 3 _-6 and channels 3 _-7 to _{3 -10} ,
The volume of other parts such as albegillo and bass may be reduced. Furthermore, in this embodiment, a plurality of musical tone signal forming channels are provided, and each of these channels forms only one musical tone at the same time. It is also possible to provide a musical tone signal forming channel and adjust the volume also at time division timing corresponding to a specific part. Furthermore, in this embodiment, the volume of all the notes constituting the chord is reduced by a single rate, but this is possible by reducing the volume of each note constituting the chord by a different rate depending on the type of chord. It may also be configured such that it is reduced by .

As is clear from the above description, the electronic musical instrument according to the present invention includes an input means for inputting key data, a tone forming means for forming musical tones for each part,
A same-sound detecting means for detecting that a specific part and another part have the same sound at the same time, and a volume control means for reducing the volume of the musical tone of the specific part, are provided. If the notes become the same at the same time, the sound of this specific part is reduced, so for example, the melody (other parts) can be changed by the sound of a chord (specific part).
This completely eliminates the problem with conventional electronic musical instruments that the sound becomes inconspicuous.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an electronic musical instrument according to the present invention. 3 _-1 to 3 _-10 ... musical tone forming means (musical tone signal forming channel), 6... input means (key switch circuit), 7... input means (performance data storage/reading circuit), 20... same tone detection means (comparison) vessel), 26...
Volume control means (gate circuit).

Claims (1)

[Claims] 1. An input means for inputting key data of a musical piece consisting of a plurality of parts, a musical tone forming means for forming musical tones of the plurality of parts for each part, and an input means for inputting key data of a musical piece consisting of a plurality of parts, and a musical tone forming means for forming musical tones of the plurality of parts for each part, and an input means for inputting key data of a musical piece consisting of a plurality of parts; 1. An electronic musical instrument comprising: a same-tone detecting means for detecting whether the musical tone of the specific part is different; and a volume control means for reducing the volume of a musical tone of the specific part based on a detection output of the same-tone detecting means.