JPS5997196A - Touch response device for 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 Field of the Invention This invention relates to touch response control in an electronic musical instrument with a single note priority function.

A conventional electronic musical instrument with a single note priority function is equipped with a predetermined priority selection criterion, selects one key from among a plurality of simultaneously pressed keys on a keyboard, and produces a musical tone corresponding to the selected key. occurs. As a priority selection criterion, the method of selecting the last key pressed (this is called last-arrival priority, and is based on Japanese Patent Application Laid-open No. 55-32030 or No. 56-88).
1.97 specification), or a method of selecting the highest note ``!'' or the lowest note among the pressed keys (this is called the highest note ``1.'' or lowest note priority). , Japanese Patent Publication No. 5
An example is shown in the specification of No. 6-154798)
etc. are known. - 10,000, a means for detecting a key touch corresponding to the six keys of the keyboard was provided, and the musical tone signals of the corresponding six keys were controlled according to the key touch detection signal detected independently for each key. Touch response devices are also known. For example, Japanese Patent Publication No. 52-4.6088 discloses that each key is provided with two key switch contacts (a break contact and a make contact), and a touch response signal is obtained from the difference in operating time between the two contacts. There is.

An electronic musical instrument equipped with an independent key touch detection means for each key may be equipped with a single note priority function as described above. For example, this applies to the case where both a multitone musical tone generation series and a single tone musical tone generation series are provided in parallel corresponding to the same keyboard part, and this is not limited to the case where an electronic musical instrument dedicated to single notes has each key. Of course, the possibility of having independent key touch detection means for each cannot be denied. The most basic idea in touch response control for such electronic musical instruments is that the musical tone corresponding to the priority-selected key is controlled by the touch detection signal corresponding to that key. However, if we try to apply such basic principles in any case, we are faced with the following problems. In other words, when the pressed key to be prioritized is switched by legato key operation, that is, when the previously pressed key is pressed 1-1, when a key with a higher priority is pressed later, then the previous pressed key is pressed. If you release the next pressed key before releasing the pressed key, the priority selection key switches to the previously pressed key (which continues to be pressed), and the key touch detection signal also changes accordingly. You will have to take it out of the key that keeps being pressed. This makes it impossible to detect the initial key touch that would normally be obtained when the key is pressed down, which poses a risk of interfering with normal touch response control. Also, I pressed one key to play trills more easily! , the other key may be pressed and released repeatedly, but in such cases, the key touches of the two repeatedly sounded keys may be extremely different, resulting in unnatural touch response control. There was a risk that it would be carried out. A similar problem occurs not only when each key is provided with a completely independent key touch detection means, but also when each key group consisting of several keys is provided with an independent key touch detection means. obtain. Furthermore, if a common key touch sensor for each key made of a long piece of conductive rubber is used in the horizontal direction of the keyboard, a similar problem occurs in that it becomes impossible to detect initial key touches. .

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide an electronic musical instrument that performs effective touch response control on musical tones generated according to the single note priority function. Specifically, touch response control can be performed without inconvenience when a key that has been pressed for a long time is switched to a key that should be prioritized by legato key operation, that is, a key that should newly start sounding. The purpose is to

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a memory circuit is provided that stores a key touch detection signal obtained from a key touch detection device in response to a new depression of the key, and the contents of this memory circuit are selected as a priority. It is controlled so that it is updated only when there is a new press of the key to be updated. The key touch detection signal stored in this memory circuit is used for touch response control of musical tones generated according to the single note priority function.

As a result, when a key that has been pressed for a long time is switched to a key that should be prioritized by legato key operation, that is, a key that should newly start sounding, the key touch detection signal corresponding to this key is The key touch detection signal related to the latest pressed key (but currently released) as the key to be prioritized and selected immediately before is used.

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

In FIG. 1, a keyboard 10 includes a plurality of keys for selecting musical tones, and key switches are provided corresponding to six keys. The key press detection circuit 11 detects whether each key switch is on or off, and includes, for example, a scanning circuit that sequentially scans each key switch and a circuit that encodes the scan results. The key-on signal KON output from the key press detection circuit 11 is so-called time division multiplexed key data (TDM).
), and sequential time slots corresponding to 6 keys (this 1
The cycle time is 1'' in the time slot of a pressed key (corresponding to one scan cycle of all keyswitches) and 0' in the time slot of a released key. The synchro pulse SYP is a pulse that becomes 1'' in a predetermined time slot every scanning cycle, and indicates the reference time slot of the time division time slot.The key press detection circuit 11 detects the scanning time slot of 6 keys. Key codes KC indicating six keys are sequentially output in response to.

When the key-on signal KON is 1'', the key code KC output in the same time slot represents the pressed key.

The control circuit 12, knee-key-on detection circuit 16, shift register 14, selector 15, and latch circuit 16 are as follows:
This is a circuit portion for preferentially selecting single-press keys using the last-arrival priority method described above. The new key-on detection circuit 16 detects a newly pressed key, and sends out one new key-on pulse KONP corresponding to the first time slot of the key at the beginning of pressing the key. This new key-on detection circuit 13 inputs the key-on signal KON given from the key press detection circuit 11, and receives the key-on signal KO from the key-on detection circuit 13.
Delay N by one scan cycle and compare the delayed key-on signal (l scan cycles ago) with the undelayed key-on signal F for the same time slot, and determine whether the former is '0'' and the latter is +111. Sends key-on pulse KONP.

The shift register 14 is a four-stage shift register in which each stage can store one key code KC, and the key press detection circuit 11 is installed in the first stage.
The key code KC outputted from the switch is given, and the above-mentioned new key on pulse KONP is used as a shift clock. Therefore, each time a new key is pressed, the key code KC corresponding to the newly pressed key is taken into the first stage of the shift register 14, and the contents of each stage are shifted to the next stage. In this way, the keys are pressed in order from the most recent to the first stage, second stage, and third stage.
Key codes KC are stored in the stage and fourth stage, respectively, and the key codes KC of the four latest pressed keys are held in the shift register 14.

The control circuit 12 is for selecting the currently pressed key code KC stored in the shift register 14 and the most recently pressed (last arrived) key code.
The details are shown in the above-mentioned Japanese Patent Laid-Open No. 56-88197. When the new key on pulse KONP is applied, the signal on line 17 applied from the control circuit 12 to the selection control input of the selector 15 is transmitted to the first stage of the shift register 14 (i.e. The stage that stores the key code is reset to select the output. In this way, the latest pressed key code selected by the selector 15 is applied to the latch circuit 16 and also to the control circuit 12. The control circuit 12 compares the key code given by the selector 15 with the key code KC given in a time-sharing manner from the key press detection circuit 11, and when the two match, the key-on signal KON is 1''. That is, on the condition that the most recently pressed key code selected by the selector 15 is kept pressed, the latch pulse LAP is output at the timing of the synchro pulse SYP (that is, every scanning cycle), and the selected key code is kept pressed. The latch circuit 16 continuously outputs a key-on signal CKON indicating that the suppression of the most recently pressed key is maintained.The latch circuit 16 launches the key code given from the selector 15 when the launch pulse LAP is given.

In addition, in the control circuit 12, when the last pressed key (that is, the key corresponding to the key code stored in the first stage of the soft register 14) is released, one of the keys pressed before that key is released. If there is one that is still being suppressed, the one with the most recent start point is selected. That is, the key code currently selected by the selector 15 and the key code KC from the key press detection circuit 11 are compared, and if they match and the key-on signal KON is 0'', that is, the key selected by the selector 15 is When the code key is released, the selection signal on line 17 is advanced by one stage.In this way, the key code being pressed is
The second stage, third stage, and fourth stage of the shift register 14 are sequentially selected until the stage 5 is selected. Of course, if the key code stored in the second stage is being pressed, this is the most recent key being pressed, so that stage will continue to be selected. In this way, when the key to be preferentially selected by legato key operation is changed to the key that is being suppressed, the new key-on pulse KONP is not generated, but the latest one of the remaining suppressed keys is selected as the priority. It is now possible to do so.

The key code latched by the latch circuit 16 is applied to a musical tone generator 18, and the musical tone signal having the note name and octave corresponding to the key code is generated from the generator 18.

In addition, the key-on signal CKO output from the control circuit 12
N is applied to the envelope generator 19, and envelope waveform signals corresponding to key presses and key releases are generated and applied to the musical tone generator 18. The output musical tone signal of the musical tone generator 18 is provided to a sound system 20.

On the other hand, a touch detection device 21 is provided in connection with the keyboard 10, and detects a key touch based on the pressing speed, pressing force, pressing depth, etc. of the key. For example, the touch detection device 21 is configured to individually and independently detect the touch of six keys, and touch detection signals of the six keys are input to the selector 22 in parallel.

The selector 22 uses the key code KC given from the key press detection circuit 11 as a selection control signal, selects the touch detection signal corresponding to the key currently being scanned, multiplexes it, and sends it to the latch circuit 2.
Give to 3. Latch circuit 26U = knee key on pulse K
Latch control is performed by the ONP, and only when a key is newly pressed, a touch detection signal corresponding to that key is latched in the latch circuit 23. Therefore, the touch detection signal in the latch circuit 23 always corresponds to the key touch when the key is pressed down.

The touch detection signal latched by this latch circuit 23 is
It is applied to the musical tone generator 18 and a multiplier 24 provided between the generator 18 and the envelope generator 19, and is used to control the touch response of the musical tone signal generated in the single note priority mode.

The multiplier 24 controls the level of the envelope waveform signal given from the envelope generator 19 to the musical tone generator 18 according to the touch detection signal, and the musical tone generator 18 controls the timbre, pitch, modulation effect, etc. of the generated sound by touching it. Control according to the detection signal.

For example, when pressing the first key, the second
When a new key is pressed, the key code of the second key is stored in the first stage of the shift register 14, and the key code of the first key is stored in the second stage. At this time, the second
A knee-key-on pulse KONP is generated in response to the second key, and a touch detection signal related to the second key is latched in the latch circuit 23. Then, the selector 15 selects the key code of the second key, the musical tone generator 18 generates a musical tone signal corresponding to the second key, and the latch circuit 23 detects a touch corresponding to the key latched. Touch response control is performed by the signal. Here, when the second key is released while the suppression of the first key is maintained, the selector 15 selects the key code of the first key from the second stage of the soft register 14, and the musical tone of the first key is selected. A signal is now generated by the tone generator 18. But New Key On Pulse K
Since the ONP is not generated, the latch circuit 23 holds the touch detection signal of the second key, and the musical tone signal of the first key is the touch detection signal of the second key, which is the most recently pressed key (but is now released). Controlled by key touch detection signal. This is rather advantageous in terms of touch response control.

This is because the touch detection signal of the first key during suppression has already lost its characteristics at the beginning of the key press, so the (numerous) touch response controls under normal conditions will respond to the musical tone of the newly pressed key. Considering that control is performed by a touch detection signal that has the characteristics of the initial key press, the actual touch detection signal of the first key, which has lost the characteristics of the initial key press, also has the characteristics of the latest key press. This is because it is preferable to use the touch detection signal of the second key, that is, the signal of the latch circuit 26 having the second key.

FIG. 2 shows an embodiment of the present invention in an electronic musical instrument in which single notes are given priority using the highest note priority method. In this example, a musical tone generator 24 for multiple tones and a musical tone generator 25 for special tones are installed in parallel, and the highest tone detection circuit 26
A musical tone corresponding to the single pressed key selected according to the highest tone priority criterion is generated by the special tone musical tone generator 25. The multiple-tone musical tone generator 24 includes a plurality (N) of musical tone generation channels, and is provided with a sound generation assignment circuit 27 for allocating one or more keys pressed on the keyboard 10 to individual musical tone generation channels. ing. The sound generation assignment circuit 27 performs the above-mentioned assignment processing based on the key press information given from the key press detection circuit 11. A key code KCch indicating the key assigned to each channel and a key-on signal KONch indicating whether or not the key assigned to each channel is being suppressed, corresponding to the time-division time slots for N channels.
is output from the sound generation allocation circuit 27 in a time-division manner. In addition, one time slot preceding the time division time slot for N channels is
Channel synchronization pulse C3YP in time slot
Output. Therefore, one cycle of the time division time slot of each channel is JN+1. This is the J time slot period, and the time slots of each channel arrive in sequence following the time slot in which the channel synchronization pulse C3YP is generated. The musical tone generator 24 for multiple tones includes a sound generation assignment circuit 27
Based on the key code KCch of each channel given from KCchO, a musical tone signal having a constant note name and off-coup is generated for each channel according to the key code KCchO value, and a tone signal is generated according to the key-on signal KCch. output to the sound system 28.

The highest pitch detection circuit 26 receives a channel synchronization pulse C3YP.
The first latch circuit 29 is cleared by the falling edge of the pulse C3YP, and the second latch circuit 60 is latch-controlled by the rising edge of the pulse C3YP. A comparator 61 compares the output of the first latch circuit 29 and the key code KCch assigned to each channel. When a key code KCch with a larger value than the key code latched in the first latch circuit 29 (assuming that a larger value of the key code is a higher tone) is given from the sound generation assignment circuit 27, the comparator 61 The output signal "1" is given to the AND circuit 62. The other input of the AND circuit 62 is the sound generation assignment circuit 2.
If the key corresponding to the key code KCchvC determined to be thicker is being pressed, the AND circuit 32 outputs the signal "i" and the latch control input of the launch circuit 29 is applied. Give “°1” to .

The key code KCch given from the sound generation allocation circuit 27 is latched in the latch circuit 29 by this signal "1'".In this way, the key code with the larger value (on the higher pitch side) among the key codes KCch of each channel The key that is currently pressed is latched in the latch circuit 29. When the time-division time slots of each channel complete one cycle, the key code of the most pressed key is latched in the latch circuit 29. Channel synchronization pulse C3YP
The highest pressed key key code of this latch circuit 29 is latched to the second latch circuit 60 in synchronization with the rising edge 9 of . When the pulse C3YP falls immediately after that, the first latch circuit 2
9 is cleared and the search for the highest pressed key is restarted. In this way, detection of the highest pressed key is repeated for each cycle of the channel time slot, and the key code of the highest pressed key at that time is continuously stored in the second latch circuit 60.

The highest pressed key key code stored in the latch circuit 30 is applied to the special tone musical tone generator 25, and a musical tone signal corresponding to the key code is generated by the generator 25 and applied to the sound system 33.

The key-on signal KONch of each channel outputted from the sound generation allocation circuit 27 is delayed by one channel time slot cycle (N11 time slots) in the delay circuit 34, and then sent to the new key-on detection circuit 35.
given to. The delay circuit 34 is provided to synchronize the timing of the output signals KCch and KONch of the sound generation allocation circuit 27, which are delayed by exactly one cycle in the highest note detection circuit 26. The new key-on detection circuit 65 further delays the key-on signal KONch' given from the delay circuit 34 by one cycle.
The key-on signal (one cycle before) and the undelayed key-on signal KONch' are compared for each channel, and when the former is °0'' and the latter is 1'' (that is, the key-on signal KONch' is
ONch' newly rises to 1''), one new key on pulse NKON is output corresponding to that channel time slot. On the other hand, the comparator 36 outputs the key code K given from the sound generation assignment circuit 27. Cch is compared with the highest pressed key key code (output of the latch circuit 60) selected by the highest note detection circuit 26, and when the two match, °°1'' is outputted and given to the AND circuit 37. AND circuit 37 is enabled in the channel time slot of the most pressed key and selects the new key on pulse NKON provided from circuit 35. Therefore, only when a newly pressed key is preferentially selected as the highest pressed key, the current key on pulse NKON corresponding to the key is set to the AND circuit 37.
and is applied to the latch control input of the latch circuit 68.

The touch detection device 39 is similar to the device 21 in FIG.
A key touch detection signal is output corresponding to the 6 keys of 0. The selector 40 selects one of the six key touch detection signals output from the touch detection device 69 that corresponds to the key code KCch, multiplexes the signal, and outputs the multiplexed signal. The output of this selector 40 is given to a latch circuit 68. The new key on pulse N K ON given as a latch pulse from the AND circuit 37 to the latch circuit 68 is synchronized with the channel time slot and the latch circuit 68 is synchronized with the selector 4o.
The touch detection signals corresponding to the keys assigned to each channel are also synchronized to the channel time slots. Therefore, only when the highest pressed key to be prioritized and selected is newly pressed, the touch detection signal corresponding to that key is latched in the latch circuit 38.

The touch detection signal latched by the latch circuit 38 is applied to the special tone musical tone generator 25, and is used to perform touch response control on the musical tone generated by the special tone musical tone generator 25. Further, the touch detection signal of the key assigned to each channel outputted from the selector 4° is given to the multiple-tone musical tone generator 24 via the line 41, and the signal is applied to the musical tone of each channel generated by the generator 24. Used to perform touch response control.

For example, if you press the first key as the highest-pressing key and then press a second key with a higher pitch, this second
The key code of the second key is latched in the latch circuit 30, a new key on pulse NKON is generated, and the touch detection signal corresponding to the second key is latched in the latch circuit 68. Therefore, the musical tone generator 25 generates a musical tone signal corresponding to the second key, and touch response control is performed by the touch detection signal corresponding to the second key.

Here, you pressed the first key! When the second key is released, the first key is again detected as the most pressed key, and its key code is latched into the latch circuit 60. However, the second key on pulse NKON was not generated, and the second key touch detection signal was latched in the latch circuit 38! ,
Manaru. Therefore, the musical tone corresponding to the first key is controlled by the touch detection signal of the second key, which is the most recently pressed key (but is now released).

Even if the highest pitch detection circuit 26 is changed to the lowest pitch detection circuit, the present invention can be carried out in the same manner as described above. Incidentally, when touch response control is not performed by the multitone musical tone generator 24, the selector 40 may be selectively controlled by the output (highest pressed key key code) of the latch circuit 60. Touch Detection Device 39id A touch detection device as disclosed in Japanese Patent Publication No. 52-46088 may be used. In that case, the 6-key key switch should be a 2-contact or 2-stage key switch, and a touch counter for N channels should be provided in the device 39 to synchronize it with the assignment process in the sound generation assignment circuit 27. A touch counter of a predetermined channel starts counting in response to activation of one key switch contact, and stops counting in response to subsequent activation of a second key switch contact. In this way, the touch detection signal of the key assigned to each channel may be obtained for each channel.

The priority selection circuit for giving priority to the last arrival, giving priority to the highest tone, or giving priority to the lowest tone may be executed by software processing by a microcomputer. For example, an example of software-processed late-arrival priority selection is disclosed in Japanese Patent Laid-Open No. 55-32030. Furthermore, the touch detection device 21.39 is not limited to one in which a touch sensor is provided for each key, but also one in which a touch sensor is provided for each key group consisting of several keys, or one in which each non-common sensor output is processed. Alternatively, each non-common sensor output may be directly used as the non-common touch detection signal.

As described in detail, according to the present invention, the key touch detection signal corresponding to the latest key press is stored, and touch response control is performed based on this, so that the key that has been continuously pressed is was not previously sounded due to the single-note priority criterion, but becomes preferentially sounded when the previous highest priority key is released, the musical tone corresponding to that key will be played by the most recent key press by the player. It is now possible to control the key touch detection signal representing the sensation, and a favorable touch response can be expected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention in an electronic musical instrument that employs the last-arrival priority system, and FIG. 2 is a block diagram showing an embodiment of the invention in an electronic musical instrument that employs the highest pitch priority system. It is. 10 Keyboard, 11...Key press detection circuit, 12.Control circuit for giving priority to the last arrival, 13.35...New key-on detection circuit, 18.25...Musical sound generation for the selected note with single note priority device, 21.39...touch detection device, 23.3
8...Latch circuit for storing key touch detection signal, 26.
Highest sound detection circuit. Patent applicant Yoshihito Iizuka, agent of Nippon Musical Instruments Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. A keyboard including a plurality of keys for selecting musical tones, and selecting a key to be sounded from one or more keys pressed on this keyboard according to predetermined priority selection criteria. a musical sound generating means for generating a musical tone corresponding to a key selected by the priority selecting means; a touch detecting means for detecting a touch of a key pressed on the keyboard; and a key on the keyboard. a knee-key-on detection means for detecting new suppression of the key; and a key touch detection signal obtained from the touch detection device in response to a new key press based on the output of the new key-on detection means, and storing the key touch detection signal. 1. A touch response device for an electronic musical instrument, comprising: a storage means, and a musical tone generated by the musical tone generating means is controlled by a key touch detection signal stored in the storage means. 2. The priority selection means selects the first key among the one or more keys that are still being suppressed when the first key that has been prioritized and selected while a plurality of keys are being pressed at the same time is released. 2
The touch detection means outputs a key touch detection signal corresponding to each key pressed on the keyboard. The storage means captures and stores the key touch detection signal corresponding to a newly pressed key on the condition that the new key is preferentially selected by the priority selection means. According to claim 1, the old memory is erased each time the key touch is performed, and the key touch detection signal of the key whose pressing start time is the latest among the priority selected keys is stored in the storage means. Touch response device for electronic musical instruments.