JPS59139094A - 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] Industrial Application Field This invention relates to an electronic musical instrument that generates a musical tone signal using phase data, and in particular, it relates to an electronic musical instrument that generates a musical tone signal using phase data. The present invention relates to an electronic musical instrument that is implemented in a phase-aligned state.

In conventional multitone electronic musical instruments, when multiple tones with the same note name in different octaves or the same note name in the same octave on different keys are sounded at the same time, the sounds are canceled due to the phase shift between the notes with the same note name. There is a problem that occurs. In order to prevent such sound cancellation, electronic musical instruments having a configuration as shown in FIG. 1 have conventionally existed. This electronic musical instrument is
Twelve phase data generating circuits 10C to 10B are provided corresponding to each pitch name C-B of the J2 scale, and each circuit 10C generates phase data that changes at a rate corresponding to the frequency of each pitch name C-B.
~10B respectively. A key pressed on the keyboard 11 is assigned to a plurality of tone georake 16-1 by the key assigner 12.
An octave code OCT indicating the octave of the assigned key, a note code N0TE indicating the note name, and a key-on signal KON are applied to the distributor 14. The distributor 14 outputs phase data generation circuits 10C to 10C according to the given note code N0TE.
10B, and distributes the phase data, octave code OCT, and key-on signal KON to one of the tone generators 16-1 to 16-8. This distribution is performed according to the assignment by the key assigner 12. Tone generator 13-1 to 16-8
each includes an octave shift circuit 15 that shifts the distributed phase data by an octave according to the distributed octave code OCT, and adjusts the pitch corresponding to the repetition frequency of this phase data according to the octave-shifted phase data. generates a musical tone signal. For example, the phase data generation circuit 10C for pitch name C includes an accumulator 16 that repeatedly adds or subtracts a predetermined phase increment value ωC corresponding to pitch name C at regular time intervals, and ω. The output ω of this accumulator 16 changes over time at a rate according to
cl is output as phase data of pitch name C. The same applies to other pitch names C# to B.

In an electronic musical instrument like the one shown in Fig. 1, musical tone signals with the same note name are always generated using the same phase data (common phase data generation circuit 10C).
10B output), there is no phase shift between multiple tones with the same note name in different octaves or with the same note name in the same octave on different keys, and no sound cancellation occurs. By the way, in such an electronic musical instrument, in order to obtain a vibrato effect with a constant cent between each note, multipliers 17C to 17B and a selector 18 are installed on the output side of each phase data generation circuit 10C to 10B as shown in FIG. had to be established. Each of the multipliers 17C to 17B individually multiplies the phase data ωct to ωBt of each note name by the vibrato data common to the vibrato data generation circuit 19,
The phase data of each note name is vibrato modulated at a common ratio. The selector 18 selects the phase data generation circuit 1 according to the output of the vibrato selection switch VIB-8W.
Select either non-vibrato modulated phase data from 0C-10B or vibrato-modulated phase data from multipliers 17C-17B.

However, this method requires as many as 12 multipliers 170 to 17B, resulting in high cost and a large circuit area.

By the way, in electronic musical instruments equipped with multiple keyboards, vibrato control is normally performed independently for each keyboard, and in that case, there may be a phase shift between the same note names on different keyboards to which vibrato is applied due to differences in vibrato control. occurs, resulting in the same sound cancellation problem as described above. This problem could not be solved with conventional electronic musical instruments.

OBJECT OF THE INVENTION In view of the above-mentioned points, it is an object of the present invention to realize vibrato control in which phases of the same pitch are matched without using a multiplier and with a simple configuration. Another object of the present invention is to make it possible to effectively match the phases of multiple tones with the same note name when they are independently vibrato controlled.

Summary of the Invention This invention provides a first pitch corresponding to an original predetermined pitch for each pitch name.
Separately from the circuit that generates the phase data, a circuit that generates second phase data that repeatedly changes in accordance with the vibrato frequency is provided for each note name, and the circuit that generates the first phase data and the first phase data for each note name is provided. Vibrato modulated phase data is obtained by adding or subtracting the second phase data. Furthermore, in this invention, the second phase data is independently generated for each series (for example, a keyboard) to which a different vibrato control is applied, thereby enabling independent vibrato control for each series. When a vibrato sound with the same note name is to be produced in a different series (different keyboard), the second phase data corresponding to the former vibrato sound is preset as the initial value of the second phase data corresponding to the latter vibrato sound. 5.・The vibrato phase at the time of attack of the same sound name in different vibrato control sequences is matched by adjusting the pitch.

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

In FIG. 3, the same reference numerals as in FIG. 1 indicate the same devices, so a description thereof will be omitted here. The phase data generation devices 20C to 20B provided for each of the 12 pitch names C-B include a pitch name phase data generation circuit 21, a vibrato phase data generation circuit 22, and an adder 26 that adds the outputs of both circuits 2L22. (For convenience, these circuits 21 to 26 are shown only for pitch name C in the figure). Similar to the conventional phase data generation circuits 10C to 10B shown in FIG. 1, the pitch name phase data generation circuit 21 generates pitch name phase data that repeatedly changes in response to a predetermined frequency (pitch) related to the pitch name. For example, for pitch name C, basic phase increment value data ω for pitch name C is generated. The accumulator 21a
By regularly repeating (- addition or subtraction), the pitch name phase data ω.t can be obtained.Other pitch names C# to B
Similarly, each basic phase increment value data ω. #
~ωB is accumulated to obtain each note name phase data ω.

Obtain #t~ωBt.

The vibrato phase data generation circuit 22 generates vibrato phase data that repeatedly changes in accordance with the vibrato frequency. For example, for pitch name C, the vibrato phase increment specified corresponding to this pitch name C is generated. value data ω
. 7 is regularly and repeatedly added or subtracted by the accumulator 22a to obtain vibrato phase data ω. vt
is obtained. The adder 26 outputs pitch name phase data ω. t and vibrato phase data ω. Pitch name phase data ω indicating a predetermined pitch by adding vt. t as vibrato phase data ωc
Phase data ω subjected to phase modulation (vibrato modulation) by Vt. t+ω. get something. Regarding other pitch names C# to B, the dedicated vibrato phase increment value data ωc#v to ωBy, which are specified corresponding to the pitch names, are similarly accumulated to generate vibrato phase data ω. #vt...ωBVt' is obtained, and this and the pitch name phase data ω. By adding #t to ωBt, phase data ωc#t+ω0#i to ωBt+ωBVt which are phase modulated (vibrato modulated) are output, respectively. Here, in order to obtain a constant vibrato for any pitch name, a vibrato phase data generation circuit corresponding to each pitch name must be configured so that the ratio of pitch name phase data to vibrato phase data is the same for all pitch names. All you have to do is set the parameters.

The selector 24 selects vibrato-modulated phase data ωct+ω that is added to the B input when vibrato is to be applied, in accordance with the vibrato selection signal output from the vibrato selection switch VIB-SW. Vt~ωBt+ωBVt is selected, and when not provided, the original phase data ωct~ωBt added to the A input is selected. The output of the selector 24 is distributed to each of the tone generators 16-1 to 13-8 via the distributor 14 as in FIG. Therefore, when vibrato should be applied, a musical tone signal to which vibrato is applied is generated according to the vibrato-modulated phase data, and the phases of the notes with the same pitch match, and the vibrato is constant in cents for any note name. It can be done.

FIG. 4 shows a case where different vibrato controls are performed for each keyboard. The keyboard 11 includes an upper keyboard section 11U and a lower keyboard section 11L, and a key assigner 25 has a key assigner 25 for each channel (tone generators 16-1 to 1'3'').
8) Outputs the octave code 0CT1 note code NO'['E of the key assigned to the key, and the keyboard code KB indicating the keyboard to which the key belongs together with the key-on signal KON. Phase data generators 260 to 26B corresponding to each pitch name C-B
have the same configuration, and representatively, generator 2 related to pitch name C
6C includes a pitch name phase data generation circuit 21 corresponding to the original predetermined pitch, vibrato phase data generation circuits 22U and 22L for each keyboard, and a vibrato phase data generation circuit 22U for the upper keyboard. The same circuit 22L for the lower keyboard can independently control the vibrato frequency, vibrato depth, etc. Original pitch name phase data ω. Adders 23U, 23L for adding t and vibrato phase data are also provided for each keyboard, and the phase data generator 26C adds original pitch name phase data ωct and vibrato phase modulated upper keyboard data. Phase data ω. t+ω. Phase data ω for uvt and lower keyboard. 10ω. LVt are output respectively. The data transfer circuit 27 is connected to one vibrato phase data generation circuit 22.
The vibrato phase data of U or 22L is transferred to the other circuit 2.
This circuit is used to preset vibrato phase data of 2Lt or 22U, and is controlled by a transfer command signal U→L or L-)U given from the key assigner 25.

The key assigner 2'5 generates a signal U-) L for pitch name C when a key with the same pitch name C on the lower keyboard section 11L is pressed while a note corresponding to the key with pitch name C on the upper keyboard section 11U is being sounded. On the other hand, when the key with the pitch name C in the upper keyboard section 11U is pressed while the musical tone corresponding to the pitch name C on the lower keyboard section 11L is pressed, a signal L->U is given to the phase data generator 26C. Similarly, for other pitch names C# to B, the signal U→L or L-+T
Phase data generators 26C# to 26 corresponding to J
Give to B.

When the data transfer circuit 27 receives the signal U4L, the vibrato phase data ω of the upper keyboard vibrato phase data generation circuit 22U is generated. The current value of Uvt is sent to circuit 2 for the lower keyboard.
2L, and presend the data to the circuit 22L. Conversely, when the signal L −+ [J is given, the current vibrato phase data ω of the circuit 22L for the lower keyboard. I,v
t is preset to the circuit 22U for the upper keyboard. In this way, when keys with the same note name are pressed on different keyboard sections, the vibrato phase data ω of the keys that are later suppressed. Uvt''!
, or the initial value of ωCLVt is the vibrato phase data ω-CLVt of the same note name key that is being sounded first. It is made to match the current value of UVt. As a result, although the manner of subsequent vibrato control differs from keyboard to keyboard, the vibrato modulation of multiple musical tone signals of the same note name on different keys is almost synchronized at the time of the attack (attack), and therefore The phases of these plurality of musical tone signals to which vibrato has been applied are substantially synchronized at the time of attack. Since the attack part is extremely important for musical tones, it is extremely effective to synchronize the phase in this part and prevent the cancellation of the sound.

The block of the distributor 28 also includes a vibrato selection function, and an upper keyboard vibrato selection switch 'UVIB-8'.
When W is turned on, the vibrato phase data ω for the upper keyboard corresponds to the note code N0TE on the condition that the keyboard code KB from the key assigner 25 indicates the upper keyboard. Select ωCU'Vt ~ ωBt + ωBUVt, and when the lower keyboard vibrato selection switch LVIB-8W is turned on, it corresponds to the note name code N0TE on the condition that the keyboard KB indicates the lower keyboard section. vibrato phase data ω for the lower keyboard. 10ω. Lvt〜ωB
Select t0ωBLVt. Of course, switch UVIB-
When 8W or LyIB-8W is off, the keyboard code''
- Normal phase data ω regardless of KB. Select t to ωBt according to the note code N0TE.

FIG. 5 shows an example of processing in the key assigner 25. First, the upper and lower keyboard sections 11U.

11L (block 29), and then uses the imported key information to detect whether there is a key that has changed from off to on (key-off event) and whether there is a key that has changed from on to off (key-off event). Detect a key-off event (block 60).3 When there is a key-on event, select one of the keys related to the key-on event and assign that key to an empty channel (tone generators 16-1 to 16-8). Perform processing (block 61゜6
2). In block 36, it is checked whether a key in another keyboard section having the same pitch name as that key is already being sounded.

If No, there is no need to match the vibrato phase between the keys, but if YES, it is necessary to match the vibrato phase between the keys, and in block 34, the key (the key related to the key-on event selected in block 61) is set to the upper keyboard. It is checked whether it is the key of the unit 11U.

If YES, the same note name key being sounded first is the lower keyboard section 11.
This means that it is the key of L, and a signal L -* is sent to the phase data generator (one of 260 to 26B) corresponding to the note name.
Send TJ (block 65).

If No, the phase data generator (
26C to 26B) (block 66). It should be noted that if a note with the same note name is already being produced on the same keyboard, the processing in blocks 66 to 66 is not performed (YES in block 42).

This is to prevent the vibrato phase that is already being sounded from shifting.

In block 67, it is checked whether all keys related to the key-on event have been processed, and if NO, the routine returns to block 61 and selects a key related to a key-on event different from the previous routine, and repeats the same process as described above for that key. block 38
Now, assign the key information KB and OCT to each channel.
, N0TE and KON to an interface (not shown). In this interface, each information KB-,-KO
N is sent out in a time-division manner in accordance with the timing of each channel and given to the distributor 28. Incidentally, when there is a key-off event, processing is performed to cancel the sound generation assignment of the key related to the key-off event (blocks 39, 40, and 41).

Note that the adders 23, 23U, and 23L that add the original phase data and the vibrato phase data may be subtracters, or may be addition/subtraction operators that add and subtract data with positive and negative signs. Of course, I.-Fuji Enerator 13
-1 to 16-8 may be such that a single 1-gen generator is used in time division for each channel.

Effects of the Invention According to the present invention, the circuit configuration can be simplified because vibrato control with phase alignment between the same note names is performed by addition and subtraction without using a multiplier. In addition, multiple identical vibrato controls can be applied.
Since the vibrato phase of the pitch name tone is adjusted in the attack portion, cancellation of the sound in the attack portion is prevented, and the attack of the same pitch name tone with different vibrato becomes clear.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional example of an electronic musical instrument that can perform phase alignment between notes of the same pitch, and Figure 2 shows an extracted configuration of Figure 1 that achieves constant vibrato. 3 is a block diagram showing one embodiment of the electronic musical instrument according to the present invention, FIG. 4 is a block diagram showing another embodiment of the same, and FIG. 5 is an example of the processing program of the key assigner shown in FIG. 4. 1 is a flowchart schematically illustrating. 11...keyboard, 12.25...key assigner, 20C~
20B, 26C to 26B Phase data generation device for each note name, 21 Note name phase data generation circuit, 22゜22U
, 22L vibrato phase data generation circuit, 23.2
3U, 23L adder, 24 selector, 14.2
8 Distributor, 16-1 to 13-8-1-1 generator, VIB-8W, UVIB-8W. LvIB-8W...Vibrato selection switch. Patent applicant Yoshihito Iizuka, agent of Nippon Musical Instruments Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. A first phase data generation circuit that generates first phase data that repeatedly changes in response to a predetermined pitch, and second phase data that repeatedly changes in response to a vibrato frequency. A phase data generating means including a second phase data generating circuit that generates the generated second phase data and an arithmetic unit that adds or subtracts the first phase data and the second phase data is provided for each note name, respectively; Selecting one output of the first phase data generating circuit or the arithmetic unit from the phase data generating means corresponding to the note name of the musical tone to be generated according to the vibrato selection signal, and using the selected phase data. An electronic musical instrument that specifies the pitch of the musical tone to be generated. 2. A first phase data generation circuit that generates first phase data that repeatedly changes in response to a predetermined pitch, and a first phase data generation circuit that is provided corresponding to a plurality of systems that perform independent vibrato control, and a plurality of second phase data generation circuits each independently generating second phase data that repeatedly changes in accordance with frequency; and a plurality of arithmetic units that individually add or subtract each of the second phase data of each of the second phase data generation circuits to or from the first phase data. A phase data generating means is provided corresponding to each note name, and the phase data generating means corresponding to the note name of the musical tone to be generated is connected to the first phase data generating circuit and the output of the arithmetic unit. is selected in accordance with the vibrato selection signal for each series, the pitch of the musical tone to be generated is specified using the selected phase data, and a musical tone having the same note name in a different series as the musical tone being generated earlier is selected. is to be sounded, the data transfer means presets the second phase data from the second phase data generation circuit corresponding to the former series to the second phase data generation circuit corresponding to the latter series. An electronic musical instrument characterized by: