JPH04121790A - Resonance effect device for musical sound signal - Google Patents

Abstract

PURPOSE:To realize natural resonance effect which provides a feeling of spatial extent by controlling sound image localization of each of resonant sound signals, generated by respective resonant signal generating means, signal by signal. CONSTITUTION:Musical sound signals TS1 - TSn which are supplied to a mixer circuit 20 correspond to their pitches (key code KC). They are weighted with sound source panning coefficients for the left and right channels to supply speakers 37 and 38 with a musical sound signal which is larger which is larger sound volume level for a lower frequency as a left-channel signal and a musical sound signal which is larger in sound volume level for a higher frequency through adders 31 and 32, etc. The musical sound signals TS1 - TSn are supplied to a resonant sound signal generation part 40 and resonant sound signals for the left and right channels which have different delay times and different sound volume levels are inputted to the adders 31 and 32 and outputted together with the musical sound signals TS1 - TSn from the mixer circuit 20, so a resonance interval and a sound image corresponding to a pitch are localized on the right side as to the phase and sound volume and the spatial acoustic effect of resonant sounds of a musical instrument which has many strings constituting resonance bodies is realized.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a resonance effecting device for musical tone signals, which is capable of electrically imitating the resonance effect of a plurality of resonators (a plurality of strings), such as a piano.

[Prior art]

Conventionally, this type of device has been disclosed, for example, in Japanese Patent Application Laid-Open No. 63-26799.
As shown in Publication No. 9, a plurality of resonance signal forming circuits are each formed of comb-shaped filters having different resonance frequency characteristics, and each of these resonance signal forming circuits generates a signal based on an input musical tone signal. By mixing multiple resonance sound signals as they are and making them sound from one or more speakers, the vibration of one string causes the other strings to vibrate. I try to get the most out of it.

[Problem to be Solved by the Invention] However, in the above-mentioned conventional device, a plurality of different resonance sound signals are emitted from the speaker in groups of 10, so
The musical tones given this resonance effect lacked a sense of spatial spaciousness and were unnatural. To explain this using the piano, a natural instrument, as an example, in the case of a piano, multiple strings that resonate with each other are arranged in a row, and each resonance tone is produced from a different position. This is because in conventional devices, resonance sounds are emitted from one location. This invention was made to deal with the above problem.
The object of the present invention is to provide a resonance effecting device for musical sound signals which can generate natural resonance sounds with a sense of spatial spaciousness by controlling the sound image localization of a plurality of resonance sound signals. [Means for Solving the Problems] In order to achieve the above object, the first invention (the above claim 1)
The structural features of the invention) include a plurality of resonance signal forming channels each forming a resonance signal with different resonance frequency characteristics based on an input musical tone signal, and a plurality of resonance signal forming channels formed by the plurality of resonance signal forming channels. A plurality of acoustic conversion means for acoustically converting and outputting each resonance signal, and a supply state of each resonance signal formed by the plurality of resonance signal forming channels to the plurality of acoustic conversion means. and a sound image localization control means for controlling the sound image localization of each resonance signal by the plurality of acoustic conversion means. Further, a structural feature of the second invention (the invention according to claim 2) is that the sound image localization control means of the first invention is transferred from the plurality of resonance sound signal forming channels to the plurality of acoustic conversion means. The present invention is comprised of a delay time control means for controlling the delay time of each supplied resonance signal for each resonance signal. Further, a structural feature of the third invention (the invention according to claim 3) is that the sound image localization control means of the first invention is transferred from the plurality of resonance sound signal forming channels to the plurality of acoustic conversion means. The present invention is constituted by a volume level control means for controlling the volume level of each supplied resonance sound signal for each resonance sound signal.

[Effect]

In the first invention configured as described above, the sound image localization control means controls the supply state of each resonance signal formed by the plurality of resonance sound signal forming channels to the plurality of acoustic conversion means for each resonance sound signal. to control the sound image localization of each resonance signal by the plurality of acoustic conversion means. for example,
As in the second aspect of the invention, the sound image localization control means is constituted by a delay time control means, and the delay time of each resonance signal supplied from each resonance signal forming channel to the plurality of acoustic conversion means is controlled by the same resonance sound signal. the sound image localization of each resonance signal. Further, as in the third invention, the sound image localization control means is constituted by a volume level control means, and the sound image localization control means is configured to adjust the volume level of each resonance sound signal supplied from each resonance sound signal forming channel to the plurality of acoustic conversion means respectively to the same resonance. The sound image localization of each resonance sound signal is controlled by controlling each sound signal. rEffects of the invention] As can be understood from the above explanation of the effects, the above first to third effects
According to the invention, since the sound image localization of each resonance signal formed by each resonance signal forming means is controlled for each resonance signal, it is possible to imitate resonance sounds caused by a plurality of strings on a piano, for example, and to A natural resonance effect with a sense of spaciousness can be achieved.

[Example] An example of the present invention will be described below with reference to the drawings.
FIG. 2 is a block diagram showing the entire electronic musical instrument according to the same embodiment. This electronic musical instrument includes a key switch circuit 11 consisting of a plurality of key switches each corresponding to six keys of a keyboard, and a key press detection circuit 12 is connected to this key switch circuit 11. The key press detection circuit 12 detects the press and release of six keys on the keyboard by detecting the opening and closing of each key switch in the key switch circuit 11. The key information is output to the key press assignment circuit 13. The pressed key assignment circuit 13 assigns a key pressed on the keyboard to one of a plurality of musical tone signal forming channels 14-1 to 14-n, and generates a key code IFcI representing each assigned key.
~KCn and key-on signal KO representing the pressed/released state of the same key
1 = KOn is synchronized with each time division timing corresponding to each channel 141 to 14-n, and each channel 1
Time division output is performed to 4-1 to 14-n. Note that the key codes KCI to KCn take values that are small for bass sounds and increase as the pitch becomes higher. The musical tone signal forming channels 14-1 to 14-n receive a cow code KC which is supplied in synchronization with its own channel timing from among the key food KCI-KCn and the key-on signals xo1 to KOn supplied in the time-sharing manner. and a capture circuit that captures the key-on signal XO, and a musical tone signal forming circuit that forms a musical tone signal based on the captured key code KC and key-on signal KO. In this case, the pitch of musical tone signals TSI-TSn formed by each musical tone signal forming circuit is key code KCI to KC.
The tone of the musical tone signal is set by the tone control parameter, and the volume envelope of the musical tone signal is set by the key-on signals FOI to KOn and the sustain signal SUS. The timbre control parameters are supplied from the timbre control parameter memory 15, which stores multiple sets of timbre sub-parameters corresponding to a plurality of timbres, and is supplied under the timbre selection signal from the timbre selection switch circuit 16. C to output a set of tone control parameters. The timbre selection switch circuit 16 is composed of a plurality of timbre selection switches corresponding to a plurality of timbre selection operators, and outputs a timbre selection signal lower C representing the selected timbre according to the operation of the timbre selection operator. Further, the sustain signal SUS is a signal representing the operation state of the sustain pedal, and is supplied from the sustain pedal switch 17, which opens and closes according to the operation of the sustain pedal. Each output of the musical tone signal forming channels 14-1 to 14-n is connected to a mixer circuit 20, respectively. As shown in FIG. 3, this output circuit 20 includes an adder 21 for the left channel and an adder 22 for the right channel. The adders 21 and 22 add together the signals supplied to each input and output the sum, and each input of the adder 21 and 22 has a multiplier 23- for determining the mixing ratio of each input signal.
1 to 23-n and 24-1 to 24-n are provided, respectively. Multipliers 23-1 to 23-n are musical tone signal forming channel 1
Each musical tone signal TSI to TS input from 4-1 to 14-n
n is multiplied by a sound source pan coefficient for the left channel and supplied to the adder 21, and the same coefficient is supplied to each control input. A plurality of sets of sound source pan coefficients for the left channel are stored in the sound source pan coefficient memory 25 for each timbre. For example, piano tone 1
As shown in Figure 4, the panning coefficient for the sound source of the set is the lowest sound (
The lowest key code (FC) is less than "1", and the sound is higher and decreases as the key code (EC) increases. Note that even when the timbre is different, the sound source panning coefficient is almost the same as that for the piano timbre, but the change curve etc. are slightly different. This sound source pan coefficient memory 25 has a key press assignment circuit 1.
The key codes KCI to KCn time-divisionally output from 3 and the timbre selection signal TC from the timbre selection switch circuit 16 are supplied as address designation signals, and the memory 25 stores a set of keys designated by the timbre selection signal TC. Included in the sound source pan coefficient group for the left channel, and key food KC1
~ Time-divisionally outputs the pan coefficients for each sound source specified by KC. The output of the sound source pan coefficient memory 25 is connected to a demultiplex circuit 26, which makes the sound source pan coefficients supplied from the memory 25 time-divisionally correspond to the time-division timing of the key codes KCI to KCn. The signals are demultiplexed and supplied to multipliers 23-1 to 23-n, respectively. In addition, the multipliers 24-1 to 24-n are connected to each musical tone signal TS1 input from the musical tone signal forming channels 14-1 to 4-n.
=TSn is multiplied by the sound source pan coefficient for the right channel and supplied to the adder 22, and the same coefficient is supplied to each control input. The sound source pan coefficient for the right channel is obtained by subtracting the sound source pan coefficient for the left channel from "1", and the subtracter 2 subtracts each output of the demultiplex circuit 26 from "1".
7-1 to 27-n. As shown in FIG. 2, the outputs for the left and right channels of the mixer circuit 20 configured in this manner are provided by adders 31, 32, digital/analog converters 33, 34, and amplifiers 35, .
They are connected via 36 to speakers 37 and 38 as sound conversion means for left and right channels, respectively. The speakers 37 and 38 are installed on the front panel of the electronic musical instrument on the left and right sides, or are arranged spatially separated on the left and right sides on a stage, studio, etc. The adders 31 and 32 are supplied with left and right channel resonance signals formed by the resonance signal forming section 4o based on the input musical tone signals. The resonance signal forming section 40 forms and outputs m resonance signals having different resonance frequencies based on the input musical tone signal.
As shown in FIGS. 2 and 5, each musical tone signal TS1=TSn from musical tone signal forming channels 14-1 to 14-n
The m weighting circuits 41-1 to 41 each input
-m. These weighting circuits 41-1 to 41-m include the tone selection switch circuit 1 in addition to the musical tone signal TS1=TSn.
The tone selection signal TC from 6 and the cow codes KCI to ECn time-divisionally outputted from the key press assignment circuit 13 are simultaneously supplied in parallel, and each weighting is applied to the circuit 41-1.
~41-m contains resonance frequency data R representing each resonance frequency.
XCI to RKCm are each supplied individually. These resonance frequency data RKCI~RKC
For example, in the case of a piano, i corresponds to the resonant frequency of each string of the piano, and the resonant frequency data generator 42
is supplied via the demultiplex circuit 43. The resonant frequency data generator 42 has a built-in memory that stores m resonant frequencies for each timbre, and generates a set of m resonant frequency data RKCI~ specified by the timbre selection signal TC from the timbre selection switch circuit 16. Output RKC+n in a time-division manner. The demultiplex circuit 43 weights the m resonant frequency data RXCI-RKCm supplied in a time-division manner to a circuit 41-
1 to 41-m. These weightings are applied to the circuits 41-1 to 41-m in detail. In FIG. (number of) is shown as a representative number. The weighting circuit 41-1 applies each musical tone signal TSI from the musical tone signal forming channels 141 to 14-n.
-TSn, and each input of the adder 51 is provided with multipliers 52-1 to 52-n for determining the volume level of each input signal. Multiplier 52
-1 to 52-n are input musical tone signals TSI to TSn multiplied by respective weighting coefficients and supplied to the adder 51, and the same coefficients are supplied to each control input, respectively. This weighting is a coefficient.The weighting is a coefficient memory 5.
For example, the weighting coefficient for one set corresponding to a piano tone is the absolute value of the difference between the key food KC and the resonance frequency RIC, as shown in Figure 6. When 1KC-RKCl is "0", it is rlJ, and as the absolute value 1) FC-RKCl increases, it gradually decreases. Note that even when the tones are different, the weighting coefficients are almost the same as in the case of the piano tones, but the change curve etc. are slightly different. This weighting is such that the coefficient memory 53 is addressed by the timbre selection signal TC and also by the signal from the subtracter 54. The subtracter 54 is supplied with time-divisionally supplied signals from the key press assignment circuit 13.
By inputting the hoods KCI to KCn and the resonance frequency data RKCi, each of the key hoods ICI to K
Value KCI obtained by subtracting resonance frequency data RKC4 from Cn
-RKCi, KC2-RKCi...KCTl
-RKCi is weighted and outputted to the coefficient memory 53 in a time-division manner. A demultiplexing circuit 54 is connected to the output of the weighting coefficient memory 53, and the circuit 54 time-divisionally outputs the weighting coefficients from the weighting coefficient memory 53 and time-divisionally outputting the weighting coefficients from the key foods ICI to KCn. The signal is demultiplexed in accordance with the timing and each of the multipliers 52-1 to 52-n and output to the multipliers 52-1 to 52-n, respectively. Returning to FIG. 5 again, each weighting is performed by circuits 41-1 to 41-1.
41-m has resonance signal forming channels 44-1 to 44.
-m+! +f are connected in series. In addition to the weighted signals from the circuits 41-1 to 41m, a sustain signal SOS from the sustain/pedal switch 17 is simultaneously supplied in parallel to these resonance signal forming channels 441 to 44-m. At the same time, resonance control parameters are supplied individually. What are the resonance control parameters? 7! Delay control parameter DLY, feedback gain parameter FBG, filter characteristic parameter FQ, panning left and right delay parameter DLYL
, DLYR and panning left and right volume parameters PANL,
PANR is set as one set, and each of these 14 (1) control parameters is set for each timbre and resonance frequency data RKCI.
The resonance control parameter memory 451 is memorized for each RKCi. The characteristics of each of the parameters described above will be explained later in the resonance signal forming channels 44-1 to 44-.
This will be clarified with a specific explanation of m. The resonance control parameter memory 45 is addressed by the tone color selection signal TC from the tone color selection switch circuit 16 and the resonance frequency data RKCI to RKCm supplied in a time-division manner from the resonance frequency data generator 42. m sets of resonance control parameters corresponding to the resonance frequencies of the resonance signal forming channels 44-1 to 44-m are time-divisionally output in synchronization with the resonance frequency data RKC1 to RKC++. A demultiplexing circuit 46 is connected to the output of this resonance control parameter memory 45.
represents the m sets of resonance control parameters as the frequency data R
It is demultiplexed corresponding to the time division timing of kCI to RKC+n and each of the resonance signal forming channels 44-1 to 44-m, and is individually supplied to the resonance signal forming channels 44-1 to 44m, respectively. These resonance signal forming channels 44-1 to 44-m
To explain in detail, Figure 1 shows channels 44-1~
44-m, one channel 44-1 (j is 1
~ m) is shown as a representative. The resonance signal forming channel 44-1 is composed of a comb filter, and includes an adder 61, a multiplier 62, a delay circuit 68, and a filter circuit 6.
It is equipped with a circular signal path consisting of 4. The adder 61 weights the signal from the adder 51 of the circuit 41-1, a multiplier 62, a delay circuit 63, and a filter circuit 64.
The signal fed back through the multiplier 62 is added and supplied to the input of the multiplier 62. Multiplier 62 is controlled by a feedback gain parameter FBGi to control the feedback gain of the circulating signal. Further, a multiplier 65 is interposed in the input path of the feedback gain parameter FBGi to the multiplier 62, and the multiplier 65 multiplies the parameter FBGi by a sustain signal 5US (rOJ or "l") and outputs the result. . The delay circuit 63 uses the delay control parameter DLYi
The input signal is output after being delayed by the time expressed by the parameter KLYi, and the resonance frequency of the resonance signal forming channel 44-1 is approximately determined by this four delay times. Filter circuit 6
4 is controlled by the filter characteristic parameter FQi, and is the frequency characteristic (low pass,
It is used to set and control filter characteristics such as bandpass, power, to-off frequency, etc. The output of multiplier 62 is also connected to the input of delay circuit 66. This delay circuit 66 delays the input signal by up to several tens of milliseconds, and a large number of signals delayed by different times ranging from 0 to several tens of milliseconds are extracted. This large number of signals are processed by the delayed signal extraction circuit 6.
7, and the circuit 67 is controlled by left and right panning delay parameters DLYLi, DLYRi, and among the many signals, both parameters DLYLi, DLY
Two signals each delayed by a designated time by Ri are output as resonance sound signals for the left and right channels, respectively. These pan left/right delay meters DLYLi
, DLYRil; EAlthough it differs slightly for each tone, it is set to the characteristics shown in Figure 7, that is, the left delay for pan, f
As the resonance frequency data RKC increases by 1, the right delay parameter DLYRi for If increases by 1.
KC increases; therefore, it is set to gradually decrease.
69 are connected respectively, and the multipliers 68 and 69 apply left and right volume/zH parameter PANLi to the input signal.
, PANRi are respectively multiplied and output as resonance sound signals for the left and right channels. These pan left and right volume noise meters PANLi, PANR
Although i differs slightly depending on the tone, it l! Setting the characteristics as shown in Fig. 8, i.e., the left volume parameter PANLi for Zun gradually decreases as the resonance frequency data RKC increases, and the right volume for Nokun, ? The parameter PANR4 is set to gradually increase as the resonance frequency data RKC increases.
The outputs of the multipliers 68 of ~44-m are respectively connected to adders 47, as shown in FIG. Output as a sound signal. Resonant sound signal formation channel 4
The outputs of the multipliers 69 of 4-1 to 44-m are respectively connected to an adder 48, and the adder 48 adds up the signals supplied to each input and outputs the sum as a resonance signal for the right channel. These left and right channel resonance signals are supplied to the other inputs of adders 31 and 32, as shown in FIG. Next, the operation of the electronic musical instrument configured as described above will be explained. When a key is played on the keyboard, the pressed key detection circuit 12 detects the opening/closing of each key switch of the key switch circuit 11 as a result of the playing of the key, and detects the pressed/released key information regarding the pressed/released key. It is output to the key press assignment circuit 13. The key press assignment circuit 13 assigns the key press/release information to one of the musical tone signal forming channels 14-1 to 14-n,
Key codes KCI to IFCn and key-on signals KOI to Non concerning the pressed and released keys are time-divisionally output in synchronization with the timing of each assigned channel corresponding to the same musical tone signal forming channels 14-1 to 14-n, and at this time The divided output key codes KC1 to KCn and key-on signals [01 to KOn are taken into the assigned tone signal forming channels 14-1 to 14n. This key food ICI~XCn and H key on signal KO1=ll:On
Musical tone signal forming channels 14-1 to 14- that incorporate
n forms musical tone signals TSI to TSn of pitches represented by the captured key codes KC1 to KCn and outputs them to the mixer circuit 20. In this case, the timbre of the musical tone signals TSI to TSn formed and outputted is controlled by the timbre control parameters supplied to the timbre control parameter memory 15, and corresponds to the timbre selected by the timbre selection switch circuit 6. Further, the volume envelope of the musical tone signal is controlled by the key-on signals X01 to Won, rises in response to a key press on the keyboard, and gradually attenuates in response to a key release on the keyboard. Further, this volume envelope is controlled by the sustain signal SUS from the sustain pedal switch 17, and when the sustain signal SUS is at a high level "1" as the sustain pedal is depressed, the volume envelope in response to the key release is controlled by the sustain signal SUS from the sustain pedal switch 17. The decay time is long, and when the sustain signal SUS is at a low level "0" due to release of the sustain pedal, the decay time is short. The musical tone signals TS1 to TSn formed in this way and supplied to the output circuit 20 are supplied in parallel to multipliers 23-1 to 23n and multipliers 24-1 to 24-n, respectively. At this time, the control inputs of the multipliers 1523-1 to 23-n contain the respective sound source pan coefficients for the left channel read from the sound source pan coefficient memory 25 in accordance with the tone selection signal TC and key foods ICI to KCn. The multipliers 23-1 to 23-n multiply the tone signals TS1 to TSn by the sound source pan coefficients for each left channel and output the result to the adder 21. Therefore, the musical tone signals τS1 to TSn supplied from the musical tone signal forming channels 14-1 to 14-n are weighted by the f coefficient for the left channel sound source corresponding to the pitch (key code KC) and sent to the adder. 21. In this case, the sound source coefficient for the left channel is set to become smaller as the pitch becomes higher (as the key code IC becomes larger) (see Figure 4). Musical tone signal TSI with a large volume level
TSn is supplied. On the other hand, the subtracters 27-1 to 27-n output values obtained by subtracting the sound source pan coefficients for each left channel from "1", so they are the complements of the sound source pan coefficients for each left channel. is supplied to multipliers 24-1 to 24-n as sound source pan coefficients for the right channel. As a result, the musical tone signals TSI to TSn supplied from the musical tone signal forming channels 14-1 to 14-n have their pitches (key code KC
) is weighted by the sound source pan coefficient for the right channel (the complement of the sound source coefficient for the left channel) and is supplied to the adder 22. In this case, the sound source pan coefficient for the right channel (complement of the sound source pan coefficient for the left channel)
is set to become larger as the pitch becomes higher (as the key code KC becomes larger), so adder 2
2 is a musical tone signal TSI~Ding S with a volume level similar to that of a treble tone.
n is supplied. Each musical tone signal TSI to TS input to the adders 21 and 22
The n signals are respectively summed and output as musical tone signals for the left and right channels, which are supplied via adders 31 and 32 to digital/analog converters 33 and 34, where they are respectively converted into analog musical tone signals. This analog musical tone signal is supplied to the speaker 37.38 via the amplifier 35.36, and the speaker 3738 emits an acoustic signal corresponding to the analog musical tone signal, so that the musical tone on the bass side is transmitted to the speaker 37 for the left channel. A large amount of sound is generated from the speaker 38 for the right channel, and a small amount of sound is generated from the right channel speaker 38. In addition, musical tones on the high-pitched side are emitted less from the left channel speaker 37, and from the right channel speaker 3.
It is often pronounced starting from 8. Therefore, the sound image of the bass pitch is on the left, and the sound image of the high pitch is on the right. On the other hand, the musical tone signals TS1=TSn outputted from the musical tone signal forming channels 14-1 to 14-n are also supplied to the resonance signal forming section 40. In this resonance signal forming section 40, each of the musical tone signals TSI to TSn is summed by m weights in circuits 41-1 to 41-m, and then sent to m resonance signal forming channels 44-1. In steps 44-m to 44-m, m different resonance tone signals are respectively formed based on the m musical tone signals summed up. In weighting circuits 44-1 to 44-m, tone signals TS1 to TSn are supplied in parallel to multipliers 52-1 to 52-n, respectively. At this time, the subtracter 54 receives the key food KC which is supplied in time division from the key press assignment circuit 13.
~KCn, each weighting subtracts the resonance frequency data RKC uniquely supplied to the circuits 41-1 to 41-m, and the subtracted value KC1-RKCi=KCn-R
KCi is time-divisionally outputted to the weighted coefficient memory 53, and at the same time, the weighted coefficient memory 53 is designated by the timbre selection signal TC and outputted from the output signal K from the subtracter 54.
The weightings specified by CI-RKCi-KCn-RECi are time-divisionally outputted as coefficients (see FIG. 6), and the weighting coefficients are assigned to the key codes KC1 to KCn by the action of the demultiplexing circuit 54. The signal is supplied to multipliers 52-1 to 52-n corresponding to the time division timing. As a result, musical tone signal forming channels 14-1 to 14-
The musical tone signal TSI=TSn supplied from n has its pitch (
It is weighted in accordance with the difference between the key food IC) and the resonance frequency data RKC4 and is supplied to the addition N51. In this case, the weighting coefficients are 6 for each key code KCI-KCn and resonance frequency data RKC4, as shown in FIG.
Absolute value KCI of the difference KC1-RKC4-ICn-RKCi
-RKCi l ~l KCn-) Since lKci l is set to a value that becomes thicker (decreasing as it becomes larger), the absolute value l KCI-RKCi l ~
l XCn-RECi The smaller l is, the greater the tone signal TSI to TSn is supplied. This absolute value 1
KCI-RKCi l ~l KCn-RKCi corresponds to the distance between a vibrating body that actively vibrates for sound production and a vibrating body that resonates with the same vibration, in other words, in the case of a piano, it is the distance between the sounding string and the resonant string. Since the adder 51 adds up each of these weighted musical tone signals TSI to TSn, this weighting realizes a physical phenomenon in which the influence of the sounding string influences the resonant string in inverse proportion to the distance. . In this way, the weighting is performed by the circuits 41-1 to 41-m, and the m musical tone signals obtained by summing the musical tone signals TSI to TSn, respectively, are processed by the adder 61 of each resonance signal forming channel 441 to 44-m, and the multiplier 62, a delay circuit 63, and a filter circuit 64, respectively. on the other hand,
These multiplier 62, delay circuit 63 and filter circuit 6
4 includes a feedback control parameter FBGi, a delay control parameter DLYi, and a filter characteristic parameter F.
Qi is supplied, and the multiplier 65 is also supplied with a sustain signal SUS from the sustain pedal switch 17. Now, the sustain pedal depression operation is released, and the sustain pedal switch air is set to low level ``θ''.
If the sustain signal SUS is input to the multiplier 65, the multiplier 65 supplies a control signal representing "0" to the multiplier 62, so the multiplier 62 transfers the tone signal from the adder 61 to the delay circuit. Do not output to 66. As a result, in this case, no musical tone signal is output from the resonance signal forming section 40. On the other hand, if the sustain pedal is depressed and operated and the sustain signal SUS of level "1" is input from the sustain pedal switch 17 to the multiplier 65, the multiplier 65 receives feedback from the input signal SUS. The gain parameter FBGi is output to the multiplier 62, and the multiplier 62 applies the same parameter FB to the signal from the adder 61.
Since the signal is multiplied by Gi and supplied to the delay circuit 63, the musical tone signal circulates through the circulation signal path consisting of the adder 61, the multiplier 62, the delay circuit 63, and the filter circuit 64. As a result, even if the supply of the musical tone signal from the adder 51 is stopped, the musical tone signal continues to circulate through the circulation signal path, and this circulating signal continues to be supplied to the delay circuit 66 as a resonance tone signal. In this case, each resonance signal forming channel 441 to 44-
Delay control parameters DLYI to DLY, filter characteristic parameters FQ1=FQi, and footnoic gain parameters FBGI to FBGm supplied to delay circuit 63 and filter circuit 64 of resonance control parameter memory 45 and demultiplex circuit 46 As a result, each resonance signal forming channel 44-1 to 44- corresponds to the timbre selection signal TC and each resonance frequency data RKC1 to RKCi.
Therefore, each resonance frequency RKCI is unique to each resonance signal forming channel 44-1 to 44-m.
~RKCml A resonance effect having a corresponding resonance frequency is imparted. This achieves a resonance effect in which each string acts as a resonator, similar to a piano. The signal output from the multiplier 62 is input to a delay circuit 66, and the delay circuit 66 outputs a plurality of delayed signals obtained by delaying the input signal by different times to a delayed signal extraction circuit 67. The delay signal extraction circuit 67 extracts the panning left and right delay parameters DLYLi and DLY supplied to its selection control input.
Delayed signals each delayed by a designated time by Ri are taken out and output to multipliers 68 and 69. The multipliers 68 and 69 multiply the input delay signals by the left and right volume parameters for panning PANLi and PANR4 supplied to each control input, respectively, and output the resultant signals as resonance sound signals for the left and right channels. Also in this case, each resonance signal forming channel 441 to 44
-m delayed signal extraction circuit 67 and multiplier 68.69
The left and right delay parameter DLYLI for panning is supplied to
-DLYLkaku, DLYRI~DLYRm and left/right volume parameters for panning PANL]~PANLm, PAN
The RI to PANR cabinet receives the timbre selection signal TC and each resonance frequency data RKCI to RKC by the action of the resonance control parameter memory 45 and the demultiplex circuit 46 similar to those described above.
Each resonance signal forming channel 44-1 to 44-4 corresponding to m
4m, each of the resonance signal forming channels 44-1 to 44-m outputs left and right channel resonance signals having different delay times and different volume levels. As a result, the left and right delay parameters for panning DLYLI~DL
YL ■ DLYRI ~ DLYR Left and right volume parameters for vertical and panning PANLI - PANL,, PANR1 ~ PA
Since NRm is set to the characteristics shown in FIGS. 7 and 8, the resonance frequency data RKCI to RKCm corresponding to the resonance signal forming channels 44-1 to 44-m have high resonance frequencies (in the piano case). treble string).
As the delay time of the resonance signal for the left channel becomes longer, the delay time of the resonance signal for the right channel becomes shorter, and as the volume level of the resonance signal for the left channel becomes smaller, the resonance signal for the right channel becomes shorter. volume level increases. In this way, each resonance signal forming channel 44-1
The resonance sound signals for the left and right channels output from ~44-m are summed by adders 47 and 48, and then added to adder 31.
．． 32, and similarly to the musical tone signals TSI to TSn from the mixer circuit 20, the same musical tone signal T
It is output together with SI to TSn. In this case, as described above, the higher the resonance frequency of the resonance signal, the longer the delay signal of the common gl sound signal for the left channel, the shorter the delay time of the resonance signal for the right channel, and the longer the delay signal of the left channel resonance signal becomes. As the volume level of the resonance sound signal for the channel becomes smaller, the volume level of the resonance sound signal for the right channel becomes larger, so the resonance pitch and sound image corresponding to the high-pitched sound are localized to the right side, both in terms of phase and volume. . As a result, it is possible to realize the spatial acoustic effect of a resonant sound of a musical instrument such as a piano, which has a large number of strings constituting a resonator. Note that the embodiment configured as described above can be modified in various ways as follows. (1) In the above embodiment, the musical tone signal forming channels 14-1 to 14-n and the resonance signal forming channel 44
Although musical tone signal forming channels 14-1 to 14-m are configured with multiple independent circuits separated spatially,
-n and resonance sound signal forming channels 44-1 to 44-m
may each be configured by a circuit that performs a plurality of time-sharing processes. In this case, musical tone signal forming channels 14-1 to 14
n, prepare n time-division channels corresponding to each channel 14-1 to 14-n, and key codes KCI to KCn and cow-on signal KO in each time-division channel.
1-) A musical tone signal may be generated according to FOn and the sustain signal SUS. Also, for resonance signal forming channels 44-1 to 44-m, m time-division channels corresponding to each channel 44-1 to 44-m are prepared, and various resonance control parameters are also applied to these time-division channels. The signals may be supplied synchronously, and calculations related to resonance signal formation may be time-divisionally processed. In this case, 1, the weighting is for circuits 41-1 to 41-m
is also composed of a circuit having time-division channels, and performs time-divisionally weighted calculations on the n musical tone signals TSI to TSn supplied in a time-division manner for each of the m resonance signal forming channels to generate m resonance signals. It is only necessary to time-divisionally output the signals to the respective forming channels. (2) In the above embodiment, each weighting is performed by the circuit 41-1.
~41-n and each resonance signal forming channel 44-1~
Each circuit configuration of 44-m is given a common number, and the resonant frequency data RKCI to RKC■ from the resonant frequency data generator 42 is
and the data R from the resonance control parameter memory 45
Each of the circuits 41-1 to 41-m44-1 to 44-m is controlled by resonance control parameters for each of KCI to RKC-, so that each circuit has a unique characteristic. -1 to 41-m and each resonance signal forming channel 44-1 to 44-m may be given unique characteristics in advance. In this case, the weighting is the circuit 4
In 1-1 to 41-m, the same circuit 411 to 41-m
Since the resonance frequency related to TSI-TSr is determined in advance, the subtracter 54 as in the above embodiment is provided, and the key food ICI~ which represents the pitch of the input musical tone signal TSI-TSr is used.
It is not necessary to calculate the difference between KCn and the resonance frequency data RKCi. That is, each weighting is applied to the circuits 41-1 to 41-
For each circuit 41-1 to 41-m, a memory storing different weighting coefficients indicating the relationship between each resonant frequency and the key codes ICI to KCn is prepared, and the key codes ICI to KCn are stored in memory. The weighting may be performed by reading and outputting the coefficients using only KCn. (3) Each resonance signal forming channel 44- of the above embodiment
1 to 44-m, the adder 61, the multiplier 62, the delay circuit 63, and the filter circuit 64C are connected in this order to each circuit 61 to 64-m.
4 is connected to form a circular signal path for musical tone signals, and an output signal is obtained from between the multiplier 62 and the delay circuit 63. However, if the delay in generating the resonance signal is not a problem, addition M61, delay circuit 63, filter circuit 64
The circuits 61 to 64 are connected in the order of the multiplier 62 and the multiplier 62 to form a circular signal path for the musical tone signal, so that the multiplier 62 and the adder 6]
The output signal may be obtained from between. (4) In the above embodiment, when the sustain pedal is depressed, a resonance effect is imparted to the musical tone signal TS1=TSn, and when the sustain pedal is not depressed, the musical tone signal s] to sI'l resonates. Although no effect is applied at all, the degree to which the resonance effect is applied may be continuously changed and controlled depending on the degree to which the sustain pedal is depressed. In this case, instead of the sustain pedal switch 17, a polycomb or the like is used to detect the amount of depression of the sustain pedal, and a detection signal representing the amount of depression is sent to the tone signal forming channel 141.
~14-n and resonance signal forming channels 44-1 to 4
The signal may be supplied to multipliers 65 of 4 to n. (5) In the above embodiment, the sound source pan coefficient memory 2
5. All values necessary for resonance control parameter memory 45 and weighting coefficient memory 53 are stored in the resonance control parameter memory 45, but only representative values are stored and interpolation calculation is used. (6) In the above embodiment, the spatial localization of the resonance sound is performed by controlling the delay time (phase control) and the volume of the resonance sound signal for the left and right channels. Although the above-mentioned localization is achieved by both level control, the localization may be achieved by either one of them. (7) In the example above, the acoustic channel (speaker 37.3
In 8), the localization of the sound image of the musical tone signal and the resonance sound signal is controlled using two channels, but the localization of the sound image may be controlled by providing three or more acoustic channels.

[Brief explanation of drawings]

FIG. 1 is a specific circuit diagram of a weighting circuit and resonance signal forming channel according to an embodiment of the present invention, FIG. 2 is an overall block diagram of an electronic musical instrument according to an embodiment of the present invention, and FIG. 3 is a concrete diagram of the mixer circuit shown in Fig. 2, Fig. 4 is a characteristic graph of the sound source pan coefficient, Fig. 5 is a block diagram of the resonance signal forming section of Fig. 2, and Fig. 6 is a diagram of the weighting section. FIG. 7 is a characteristic graph of the coefficient, FIG. 7 is a characteristic graph of the delay time for panning, and FIG. 8 is a characteristic graph of the volume for panning. Explanation of symbols 11...Key switch circuit, 12...Key press detection circuit,
13... Key press assignment circuit, 14-1 to 14-n, 17.
...Sustain pedal switch, 20...Mixer circuit, 37.38... -Speaker, 40...Resonant sound signal forming section, 41-1 to 41m...Weighting circuit, 42.
・・Resonant frequency data generator, 44-1 to 44-m・・
- Resonant sound signal forming channel, 45... Resonance control parameter memory, 51... Adder, 52-1 to 52-n
. . . Multiplier, 53 . . . Weighting is done by coefficient memory, 54.
... Subtractor, 61... Adder, 62, 66... Delay circuit, 64.65... Multiplier, 67... Delayed signal extraction circuit, 68.69... Multiplier.

Claims (3)

[Claims] (1) A plurality of resonance signal forming channels that form resonance signals with different resonance frequency characteristics based on input musical tone signals, and acoustic conversion of each resonance signal formed by the plurality of resonance signal forming channels. a plurality of acoustic conversion means for outputting the resonance signal; and a supply state of each resonance signal formed by the plurality of resonance signal forming channels to the plurality of acoustic conversion means is controlled for each resonance signal to output the plurality of resonance signal. 1. A resonance effecting device for musical tone signals, comprising: sound image localization control means for controlling sound image localization of each resonance signal by acoustic conversion means. (2) The sound image localization control means according to claim 1 is configured to adjust the delay time of each resonance sound signal supplied from the plurality of resonance sound signal forming channels to the plurality of acoustic conversion means for each resonance sound signal. A resonance effect device for a musical tone signal comprising delay time control means. (3) The sound image localization control means according to claim 1 controls the volume level of each resonance signal supplied from the plurality of resonance signal forming channels to the plurality of acoustic conversion means for each resonance sound signal. A resonance effect device for a musical tone signal comprising a volume level control means.