JPS6041094A - 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 Technical Field The present invention relates to an electronic musical instrument, and more particularly to an apparatus that allows musical tones of pure tonal scales for various keys to be obtained with a simple configuration.

Conventional technology Ordinary electronic musical instruments generate musical tones according to an equal tempered scale, but when multiple musical tones are generated at the same time, such as in a secret performance, it is better to use a pure tonal scale or a performance sound with a beautiful resonance. It is something that can be done. Therefore, electronic musical instruments that can generate musical tones using a pure tuning scale have been considered for some time.

For example, in the electronic musical instrument disclosed in Japanese Patent Application Laid-open No. 55-6599G, when a predetermined chord is detected, the pitches between the notes of the chord are pure; ;t+ 7i111, but since the pure intonation scale is applied only to one predetermined chord, it cannot be said to be a completely pure intonation scale electronic instrument. Also, special 131j In the electronic musical instrument disclosed in Publication No. 58-54395, the pitch name of the tonic is specified, and a sound source signal of a pure key escape scale is generated according to this tonic.In the pure key scale, each part (C key , C# key...B key)
The frequency relationship of each γ7 (C-B) is different for each case, so
〒のi′)Specify the name of the part), and depending on this tonic note (name of the part; correspondingly), each of them has its own pure tonic scale? a(
l+, i signal must be generated and 7 t゛J, f r.

In order to do this, a take is prepared for each tonic that determines the frequency of the scale t' for each tonic (for each key), and the structure of the take memory is complicated. It had become Furthermore, in the prior application No. 1, the key 1:1- is selected from among the keys to be pressed, so it is not necessarily possible to specify the key or to relieve pain (it was not limited to 1).

Purpose of the Invention This invention has been made with the above-mentioned points in mind; Raku of the floor)? This is an attempt to provide electronic music that can be generated in 1°Ji formation.

Summary of the Invention According to this invention, each tone of genuine tone) 1 bamboo is 11≦1.
The structure of the memory is simplified by storing the frequency take for setting the frequency of blue 1゛1 in the memory only for a predetermined standard key, without preparing it in advance for all keys. Characterized by ancient times. A key specifying means is provided, and a take indicating the pitch of the musical tone to be generated is set according to the key specified by the key specifying means.
(transposing from the specified key to the reference key), and reads frequency data from the memory in accordance with the converted scale note data. The frequency value read out in this way is music i' in the pure tonic scale? The number of pitches per cycle is set, but due to the above-mentioned take conversion (transposition), the pitch is shifted from the original pitch that is intended to be generated. Therefore, a frequency shift means is provided for shifting the frequency set by the frequency take by a predetermined ratio according to the specified key (transposing from the reference key to the specified key),
The frequency of the musical tone signal is determined based on the frequency take effect and the output of the frequency shift means.

Embodiment FIG. 1 shows an embodiment of an electronic musical instrument according to the present invention. In this example, 1j]variable frequency division method i'? 'i"li is played. 1-; fingering the high note 5j-
Then, ~') Use the keyboard 1o as the 0 means [=). , -1--Arii J-11 raises the keys on this keyboard 1o and presses r I , 1) il'.

The pronunciation of musical tones associated with
, No. 1) Assigned to any available key 1.1, assigned to each channel 1. Key 4
・Show -1--: J-IK C and the key press is Azo ε, but whether or not the two small key-on signal K ON, each 1,000-1'7 I: J: h- fL'1/)t':
11 is output from the key early ina 11] 31, -1
- 2ljK C shows no okkufu, 10 tata-noni I -1' OC, +.

Within the okkufu, it consists of (pu)゛・i''name・,'l-小zuノ)・211・NC.

Phase 'yjJl'A year 1-127! Each (・tono style (
C key, CII key, ...■3 key)
1-1, and the key generation circuit 16 is connected to this switch.
J-12 (C does not indicate the specified key and generates a key ending (main 1 "?" of the key). Key coder 1/conversion circuit 141 (-1, -1) A→)゛-1---Fu-mouth <c(!: Key data generation circuit 1
Output from 6 7/tile 1. The key code KC (take indicating the pitch specified by the player) is converted into data ζ indicating the scale note in a predetermined reference key according to the key key. . When the standard key is C, this ;1/- chord conversion circuit 14 performs take conversion as shown in the following table.

Table 1 Normally, key code KC (i sono toko-1-' N
C is converted as shown in Table 1; (9, octa--7
2-1-do OC is not converted. However, the part surrounded by the dividing line in the first person ζ
C is converted to a value one octave higher. ko;l+,
This is to accurately set the number of tones of each scale note relative to the i; J and nido notes. As the key code conversion circuit 14 (
, 1. Is it possible to have a memory that stores data conversion tables like Table 1 in advance? 14 Dangetsu 114
, r 5-1262964 publication, it is also possible to use the transposition technique based on the 2 l-1 · r mountain-shi (tora calculation).

The frequency division value memory 15 is stored in the key of the base (f) (hereinafter referred to as the key of C).
, j: quasi key) is the genuine IAI? For each note 1, 1F17 j''l of the ``j'' scale, the frequency-no-ri corresponding to that frequency is written in advance, and this embodiment C'' variable frequency division method? ”+I!!:: Therefore, the frequency division value take is used as the frequency take.

A pure tonic scale is one in which the frequency ratio of each of the 14 levels of 1 to the tonic tone can be expressed as a ratio of integers as shown in the following table. In the same table, is there a column for the note name of each scale note? In this example, the name of the note before the key of C is shown, but this frequency ratio does not change even if the name of the tonic note (chomo) changes.

In the key of C (・C 5.5Li-~B) Comparing the frequencies of the five tones for the pure key j' I can do it.

No.: 3 people C4A (Unit: I(Z) ゝ＼、 genuine.

Hierarchy C Frequency division value memory 15 (1)
t) A frequency division 111i take corresponding to the pure tonic scale frequency 19 in the key of C is stored. Master tough 1 for frequency division by 3
Perimeter of one pulse? The number of skins is 1. ,'506ri6'J2
-IM II Z Yoshishino J Yoshiki, each of the above -7305~
Not compatible with B5iζ ;:) Genuine key 1゛'' 1 scale 1 nol! The frequency division value of Z and ri is f as shown in the following table. The frequency division value of (JliLsa1te(・
Ru,.

In this example, C#5 to C (i 7'j to the highest octa
By frequency-dividing the mask clock and tsuku pulses, a signal with the highest ockuuf frequency is generated, and by further dividing this frequency-divided signal by 1 ockuuf according to the ockufu code oc, a signal with the desired frequency is generated. I
I try to do that. Due to these important terms of construction,
In the frequency division value memory 15 ('', 05~135 fee (J
05 in the sense of storing the frequency division value data corresponding to the frequency of each scale note of the pure articulation scale related to C key 1 etc.
This is substantially equivalent to storing the frequency division value of ˜B 5 'M. In addition, in this case, ofcufuco-1・oC
Is the code number C#5~C6? ``? is the highest occufu, and their occufuco-1-OC are the same value, and every time I t /-7 decreases from it, (C4L4-
C5, C#: C5, C#: U~Cノ+,-,) A scale for switching values, convenience of Okkuuf frequency division control 4.

=1=- Among the key codes KC' output from the code conversion circuit 14, whether the two codes -1/NC' or the frequency division value memory 15
C#
-C, the frequency division values stored in the memory 15 and corresponding to the C#5 to C6 notes are read out. The frequency division one take read from the memory 15 is the CI of each channel.
-I 1~CI-I N (N is the number of channels)
1 corresponding to J-I, Sea 216-1 to 1
6-N. Also, each 1--Nshene Lake 1
6-1 to 16-N, the off-coupling code 1 included in the 1-on signal K ON outputted from the Leena 11 and the key two-layer FKC' outputted from the key code conversion circuit 14. - OC' or people are input.

Each of the 1.-n geoerators 16-1 to 16-N (i.
-1 will be explained. Latch circuit 17i, 1, frequency division value data of each channel inputted in a time-sharing manner, -1--1-on circuit-KON'
Of these, there is one that selectively latches the one corresponding to this channel Cl-11, and the latch: Ij! I starve.

The latch circuits (not shown) of other channels CH2 to CHN are connected to channel timing pulses Tc1]2 to TchN corresponding to the time division timing of the respective channels.
controlled by The latch circuit 17 receives the frequency division signal (the 1st variable frequency division circuit 18 outputs the
The frequency dividing value of the variable frequency dividing circuit 18 is set. The variable frequency divider circuit 18 divides the clock pulse inputted from the clock pulse generation circuit 19 by a frequency division ratio according to the frequency division value take, and gives the divided output to the frequency divider circuit 2o. .

The Okkuuf frequency divider circuit 20 is latched by the latch circuit 17 41. The frequency division output of the variable frequency divider circuit 18 (3 which divides the S number by the Octave frequency)
, octa---) The output of the frequency dividing circuit 20 is connected to the switching circuit 211.
The key signal latched in the latch circuit 17 is turned on, and the key is turned on and off depending on whether it is turned on or not.

The musical tone signal of each channel CI-11 to CHN, which is formed by the 1-sonoenerators 16-1 to 16-N consisting of the variable frequency division type T-box 11 as described above, is given to the timbre circuit 22. Tone fI! I fj4i was applied and then given to the sound system, 26; 1 to 3
, By the way, the outer circumference value read out from the frequency division value memory 15 is the same as the one pressed on the keyboard 10. Sa・17. There is no direct correspondence to the frequency of 19hi, but it corresponds to the frequency transposed to the key of (f-). (iL is Jj of ♂
Go[de(J, '1clj board 10' specified pitch and (
Music with a pitch of 1y1￥: 'S"f+" is generated from 16-1 to 16-N.

Taking this point into account, the frequency set by the frequency division value read out from Memo January 5 is set by the key specified by the key specifying means (shifted at a predetermined ratio according to your request). A frequency shift 1-d stage is provided to transpose from the key of base/(+, to the specified key). There is a clock pulse generation circuit 19, which is generated from the key node generation circuit 13, and the number of cycles jl'l is i'l. 91J Generate a block pulse., like this-) (・Change the frequency of the block pulse for half frequency division by i1j according to the specified key!,
(From , 1, the frequency of the divided output of the variable frequency divider circuit 18 is shifted from the frequency originally set by the frequency division value data by a predetermined ratio according to the designated key. .

The frequency of this frequency-dividing clock pulse is determined according to the frequency ratio between the frequency of the tonic of the specified key and the pure tonic scale frequency of the tonic that is transposed to the standard key. still,
The frequency of the tonic tone of each part shall be set according to the equal temperament scale.

For example, in the key of B, the tonic B note (the highest B of ochkufu)
The frequency of the five notes is 987.767Hz according to equal temperament.
(Refer to Table 3).If the pitch is still transposed to the C key (standard key) of the pure tuning scale, the B5 note will become C6.
The pure articulation of C6 tone 1 @ frequency 10 □ 16.502 Fl z (No.
The frequency is twice that of the 05 note in Table 3).

987.767 The frequency ratio between these two (J-Xun Fui, 5 (W). Here, the frequency of the clock pulse for frequency division of the C key (!:), which is the same as the specified key or the standard key, is set as described above. 1.506963 to
24. Assuming MI-1z, the clock pulse for frequency division in the key of B (1, ri87.767 ■・5069632d
04 MHzL.

If the frequency of the dividing clock pulse corresponding to each part is determined in this way, the frequency will be as shown in the following table. Therefore, the clock pulse generating circuit 19 generates 11 pulses with a frequency as shown in the table in accordance with the adjustment.

As an example of Table 5, the operation of FIG. 1 will be explained in the case where the key of B is specified and the 5th note of B is specified on the 9P board 10. B5
The note key code KC is converted into the 06 note key code KC' by the key code conversion circuit 14 (see Table 1), and the frequency division value take l' corresponding to the C note of c yra is stored from the frequency division value memory 15. -]11. =IOJ is read (see Table 4). The clock pulse generation circuit 19 generates a frequency division mask clock pulse having a frequency J corresponding to the B key, 712238904MH2 (see Table 5), 1.42238904 (MHz) -;-] 1I
40-. 987.767 (I(z)' or the variable frequency divider circuit 18). frequency 9
B7.767 Generated in H2 (see Table 3).

Next? To explain the case where the I3 key is specified and the E5 note is specified on the 10th key, the key code K of the 1st 5th note is
C7iF5 is converted into the key code KC' (see Table 1), and the frequency division value take [21, GOj corresponding to the F note of the key of C is read out from the frequency division value memory 15 (see Table 71). Therefore, in the variable frequency divider circuit 18, 1.42238! 'lo/l(MH2)÷2160-=
658.511 (H2) is performed, and t"i" of the 1st F'i' of B key:'i'r'!:tl at i
) is the musical tone signal of E5 note or the frequency of pure key - C 1st floor + i5
8.1"l111-12.As mentioned above, the B5 note in the key of B is 987, 767.
B 1j”r (-1, 1! 1: p, 88:
It is clear that the first IZ is produced by the first I'3 I of the tonic and the E5 'i of the first ■.
'j' If you look at the frequency ratio of J, you will find that it is a pure articulatory scale ('h is 8.

Similarly, each scale of the 13th key H4 ■ 3.1 ~ A 4t5 b
7. ll'j L-'key to 1/to conversion circuit 14' 5 (Jru conversion 1-:l lKC', memory 15 to i
]゛C non-protruding frequency division I 11' j--ta・Finally obtained frequency, each of these 1・゛1st floor H1, period t no k A'
Show the numerical ratio between I and the circumference t of the tonic scale, i'/, : :
111.

f! 5 Table B key (clock 1.42238904 MHz) No. 5
As is clear from the table, it can be confirmed that a musical tone signal is formed at the frequency of the pure IE tuning scale in the I3 key. Regarding other keys, it is possible to form musical tone signals at the frequency of the pure tonal scale, as in the case of the ``double''. This can be confirmed by following the same procedure as in the case of the above-mentioned B key in the 11th example of Fig. 1, so a detailed explanation will be omitted.

The present invention can be applied not only to electronic musical instruments using a variable frequency division method sound source as described above, but also to electronic musical instruments using a phase calculation method. In that case, there is a tongue showing the main parts, as shown in FIG.
The input signal 19 is the same as that shown in FIG.
The delay 25(C) is controlled by the variable clock pulse from the clock pulse generation circuit 19.
Modulation is 1ff4jl. In other words, the frequency number memory 24 stores the genuine key iS with respect to a predetermined standard key.
A frequency number F proportional to the frequency of each scale note is stored in 1y, and this frequency number F is read out in accordance with the key code KC' converted by the 4-1 code conversion circuit 1.4. The frequency number F read from the memory 24 is added repeatedly by the Akicom rake 25, and this A:1
--The output of Murake 25 is used as a phase address signal.
- Input to Njeo Lake 26. 1.
26 (forms a musical tone signal in accordance with one phase attribution signal, and consists of, for example, a waveform memory or a musical tone forming circuit using a frequency modulation calculation method). The ♂′1 qui mink is controlled by the clock pulse, and the frequency of the ○ nori D tsuku pulse is controlled according to the specified key as described above.Therefore,
A frequency shift corresponding to the key is realized.

FIG. 3 shows a modification of FIG. 2, in which a frequency shift take generation circuit 27 and a multiplier 28 are used instead of the clock pulse generation circuit 19 as frequency shift means. This frequency shift data generation circuit 27 (4 designations a+, '!I) generates a predetermined numerical value take, and multiplier 28 leverages the numerical value take to the frequency number F by multiplying it to the value of the frequency number F. Change this to 1
3, which realizes 1, ', j wave number shift according to the key.
In this case, A1-7. The calculation timing of L-25 is controlled by a fixed side bet.

In general, the pure tonic scale is suitable for playing chords.
Dol:: M Support 'J' and apply this invention, and for the main 11-1 keyboard (also f,,,,I, jl・j↓ area), follow the equal temperament 1'j scale as before. A”: i'i
- It is better to generate 3. Also, ``Second Record B
In the jn example, the standard key is c'? Of course, it is not possible to have him as a junior, but he can also be a sideline.

Effects of the Invention As described above, this invention 1. Frequency data (t19i constant) 11.・
``;((Ill
I Shikaiun (J, 1, Ino, extremely simple 4I
Generates a musical tone signal in a pure tonal scale for the key of 1 and \. Since it can be made into a scale, it becomes possible to generate a melodic harmony t1 like an arpeggio in the pure key -1l1 scale.

[Brief explanation of drawings]

FIG. 1 is an electrical block diagram showing an embodiment of the present invention;
FIG. 2 is an electrical block diagram showing the main parts of another embodiment;
Figure 3 ("Electrical block diagram showing a modification example of Figure 2,
It is. 10 keyboard, 11 key adjuster, 12 key designation switch, 13 key taper generation circuit, 14 key 1-j-1.
Conversion circuit, 15 Frequency division value memory, 16-1 to 16-N
・Variable frequency division type 1/airake, 19 Clock pulse generation circuit, 24 Frequency number 7 mori, 25
Accuj, Lake, 261--/Nio Lake, 27-
Zhou? Peel shift i/te generation circuit, 28 multiplier. Applicant: Nippon Musical Instruments Manufacturing Co., Ltd. Agent: Yoshihito Iizuka

Claims (1)

[Scope of Claims] 1. Pitch specifying means for specifying the pitch of a musical sound that does not occur, and 11 (4 specifying means and the pitch specified by the pitch specifying means) for specifying the key. a take converting means for converting a take indicating a scale into a scale tone take falling in a predetermined standard key according to the key specified by the key specifying means;
Regarding the standard key, a frequency number corresponding to the frequency is stored in advance for each scale tone of the 11 regular scale,
A memory in which this frequency take is read out in accordance with the scale tone take converted by the take converting means, and a frequency determined by this frequency take is shifted at a predetermined ratio corresponding to the key specified by the key specifying means. 1- a frequency shift means for outputting a signal for the purpose of outputting a frequency shift means, and a frequency shift means for forming a musical tone signal having a frequency determined according to the frequency take signal read from the memory and the signal output from the frequency shift means; An electronic musical instrument equipped with forming means. 2. The frequency shift]-means is predetermined according to the key specified by 1) IJ note specifying means 2. It generates clock pulses with a frequency of
Recording music sound forming means This clock pulse frequency fJk'
? l ('1) The electronic musical instrument according to claim 1, which forms a musical tone signal with a frequency determined according to the value of the frequency take. 3. The frequency take stored in the memory is It is a take indicating the circumference value, and the above-mentioned ease 1-1-forming means (,I,1i
: Divide the clock pulse 1 by this frequency 1'l -7'' - (easier by dividing according to ll'l) f,
, I'(", The first patent claim which determines the circumference of the bow tJk number 4 (2) "! +: L: - Defective electronic musical instrument.