JPH10124052A - Touch detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a musical sound from changing unpredictably by individually setting resolution for detecting an ON/OFF state and resolution for detecting the time difference in closure between two switches, which detect keying speeds on a keyboard musical instrument, for the two switches. SOLUTION: A touch timer 5 and a scan timer 6 generate interrupt signals INT1 and INT2 at periods corresponding to touch timer data Tt and scan timer data St. When INT2 is inputted to a CPU 7, a key scan circuit 2 scans a keyboard 1. When INT1 is inputted to the CPU 7, a touch counter TC counts up by one, thereby counting the touch data as a keying speed of each key at this period. Here, Tt and St are individually settable. On the basis of past touch data. newly detected data may be corrected in the direction where the variation is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch detection device for detecting an operation state of sounding instruction means such as a keyboard.

[0002]

2. Description of the Related Art For example, in a conventional electronic keyboard instrument, two switches are provided on the lower surface of each key, and two switches are closed with a time lag with a keying operation. is there. Then, turning on / off the above two switches
The OFF state is scanned at a constant cycle (scan), and the time difference between the closing of the two switches is counted using a clock of a constant cycle. The obtained time difference data is used as touch data indicating a keying speed or a keying intensity, and this touch data is used as one of musical factors for determining a tone color, a volume, and the like of a musical tone to be generated.

[0003]

However, in the above-mentioned conventional apparatus, a timer operation for determining a scanning cycle for scanning the on / off state of two switches provided for each key, and the above-mentioned two switches are provided. And a timer operation for determining a counting period for counting a time difference when the timer is closed has been performed by one timer. For this reason, the resolution when detecting the on / off state of the switch and the resolution when detecting the time difference when the switch closes cannot be made different.

Further, for example, even if a player strikes a plurality of keys on a keyboard at the same speed or strength, the keys do not have exactly the same speed or strength but slightly change. For this reason, even if a plurality of keys are continuously pressed at the same speed or intensity, the volume and waveform of the musical sound of each key may be different. Further, there is a limit to shortening the timer cycle of the timer, and the resolution for detecting the time difference cannot be infinitely increased.

[0005] For this reason, even if a key having the same pitch is struck at a slightly different speed or intensity from the previous striking speed or intensity, the touch data may greatly change. In this case, since the volume and waveform of the musical tone generated in response to the touch data change, the musical tone changes unexpectedly by the player.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method of scanning the operation of a plurality of operating means provided corresponding to each of a plurality of sounding instruction means, Is different from the cycle of counting the operation time difference of the operation means.

Thus, the scanning cycle and the counting cycle can be different, and the resolution for detecting the operation of the plurality of operating means and the resolution for detecting the operating time difference between the operating means are different. Can be set to

[0008] Further, according to the present invention, the touch data of the sounding instructing means is obtained, and the newly detected touch data is corrected so that the difference between the past touch data and the newly detected touch data is reduced. It is like that.
Thereby, a change in touch data can be reduced.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

1. Overall Circuit FIG. 1 shows the overall circuit of an electronic musical instrument. Each key of the keyboard 1 is scanned by the key scan circuit 2, data indicating key-on and key-off is detected, and written into the RAM 8 by the CPU 7. The keyboard (electronic keyboard instrument) 1 may be replaced by an electronic stringed instrument, an electronic wind (wind) instrument, an electronic percussion instrument (pad or the like), a computer keyboard, or the like. Panel switch group 3 provided on operation panel
The switches and keys are scanned by the panel scan circuit 4. The scan data is sent to the CPU 7 and written to the RAM 8.

The touch timer 5 generates an interrupt signal INT1 at regular intervals and sends it to the CPU 7. The scan timer 6 generates an interrupt signal INT2 at regular intervals and sends it to the CPU 7. The touch timer 5 and the scan timer 6 perform time counting using a clock signal generated from a clock generator in the CPU 7 or a separately provided clock generator, and generate interrupt signals INT1 and INT2 when the time is up. . Less than,
A cycle in which the interrupt signal INT1 is generated from the touch timer 5 is referred to as a “count cycle”, and a cycle in which the interrupt signal INT2 is generated from the scan timer 6 is referred to as a “scan cycle”.

The CPU 7 stores touch timer data Tt or scan timer data St, which will be described later, in the RAM 8.
And sends it to the touch timer 5 or the scan timer 6. The touch timer 5 is programmable, and generates an interrupt signal INT1 at a cycle according to the touch timer data Tt, and the scan timer 6 is also programmable, and generates an interrupt signal INT2 at a cycle according to the scan timer data St. Therefore, the count cycle or the scan cycle can be changed by changing the touch timer data Tt or the scan timer data St.

The key scan circuit 2 scans each key of the keyboard 1 at the scan cycle. That is, when the interrupt signal INT2 is input to the CPU 7, data for instructing the start of scanning is sent from the CPU 2 to the key scan circuit. The key scan circuit 2 scans each key in response to the command data, and temporarily stores the scan data in a buffer. Also, CPU
7, when the interrupt signal INT2 is input, sends the command data to the key scan circuit 2, reads the scan data stored in the buffer, and temporarily stores the scan data in a ring buffer in the CPU 7.
The RAM 8 stores various data, and a part of the stored data is displayed on an LCD (liquid crystal display) 21 provided on an operation panel.

The ROM 9 (internal storage medium / means) stores computer programs corresponding to various flowcharts to be described later and corresponding to various processes executed by the CPU 5. This computer program is stored in a CD-ROM (external storage medium / means) or the like, and written and stored in the RAM 6 (internal storage medium / means) (installed / transferred / copied).
Sometimes. The ROM 9 stores sequence information such as rhythm and chord corresponding to each pattern such as intro, fill-in, and ending. The pattern selected by the selection key of the panel switch group 3 is read out and automatically played. You.

The MIDI circuit 10 is an interface for transmitting and receiving musical tone information to and from an externally connected electronic musical instrument. The tone information is based on the MIDI (Musical Instrument Digital Interface) standard, and a tone or an automatic performance is also performed based on the tone information. When the musical tone information is sent to the MIDI circuit 10 and temporarily stored therein, an interrupt signal is given to the CPU 5, and the transmitted musical tone information is taken in and the musical tone information is transmitted / received.

The tone generator 11 is a tone generating circuit using a DSP (Digital Signal Processor) or MPU (Micro Processing Unit).
The tone generator 11 generates musical tone data corresponding to musical factor data such as key numbers, touches, timbres, and rhythms input from the keyboard 1 and the panel switch group 3. In the tone generator 11, a tone generation system for a plurality of channels, for example, 16 channels is formed by time-division processing, and the tone can be generated polyphonically. The tone data assigned to each channel is stored in an assignment memory (not shown).

In the sound system 12, the tone data sent from the tone generator 11 is filtered by a digital filter, a reverb effect is added by an effect circuit, and a sound image position is set by a panning circuit. Will be further,
In the sound system 12, an analog signal corresponding to the tone data is generated by a DA converter and is generated from a speaker.

2. Panel switch group As shown in FIG.
D (liquid crystal display) 21, a knob 22 for setting a volume, a knob 23 for setting a tempo, an up key 24, a down key 25, a mode switch 26, various setting switches and operation switches (not shown) Is provided.

A knob 22 for setting the volume is an operator for changing the volume of the whole tone generated by the sound system 12. Also, a knob 2 for tempo setting
Reference numeral 3 denotes an operator for changing the tempo of a musical tone generated by the automatic performance. Then, the operation amounts of the knobs 22 and 23 are detected by the panel scan circuit 4, and the detected operation amount data is sent to the CPU 7. The operation amount data input to the CPU 7 is used as volume data or tempo data. This volume data is one of the performance intensity factors, and the tempo data is one of the performance speed factors.

The up key 24 increases the numerical value displayed on the LCD 21, and the down key 25 decreases the numerical value displayed on the LCD 21. Up key 24 and down key 2
Reference numeral 5 is connected to an up / down counter (not shown), and the count value changes by operating both keys 24 and 25. This count value is read by the panel scan circuit 4 and sent to the CPU 7.

The mode changeover switch 26 is a switch for changing over a parameter setting mode using the up key 24 and the down key 25. Each time the switch 26 is operated, the mode for setting the count cycle and the mode for setting the scan cycle are switched. Therefore, the count cycle and the scan cycle can be set separately and independently, and the count cycle and the scan cycle can be set to different values. Of course, it is also possible to set the count period and the scan period to the same value.

The LCD 21 displays the cycle in the setting mode. For example, in the mode in which the cycle of the touch timer 5 is set, “TOUCH = 1/256”, and in the mode in which the cycle of the scan timer 6 is set, “SCAN = 1”.
/ 128 ", the mode name and the cycle are displayed.

3. Key Switch As shown in FIG. 3, a base 30 made of an elastic body is attached to the lower surface of each key K of the keyboard 1. The base 30 is formed in a stepped shape having a step. The switch S1 is provided on the lower step surface, and the switch S2 is provided on the upper step surface. Then, on a substrate 33 provided below the key K, contacts 31, 32 facing the switches S1, S2 are provided at the same height. FIG. 3 shows the dimensions in the up-down direction larger than the actual size.

When the key K is depressed, the switch S1 first comes into contact with the contact 31 and is closed, and the switch S1 is turned on. Next, the switch S2 is closed with a time difference in contact with the contact 32, and the switch S2 is turned on. Then, as shown in FIG. 4, based on a time difference Tv from a time T1 when the switch S1 is turned on to a time T2 when the switch S2 is turned on, touch data representing a keying speed or a keying strength is created. The key-on event is a time T2 when the switch S2 is turned on, and the key-off event is a time T3 when the switch S1 is turned off.

4. Register Group FIG. 8 shows a part of a register group provided in the RAM 8.
Registers provided in the RAM 8 include touch count data TC, key designation pointer data x, total key number data KN, touch data Tnew, relaxation rate data R, touch timer data Tt, scan timer data St, tempo data Tmp, volume. Data Vol and the like are stored.

The touch count data TC is counted up in synchronization with the above-described counting cycle in a touch counter process described later. This touch count data TC is
It is used as time data for obtaining a time difference when the switches S1 and S2 are closed.

The key designation pointer data x is an R
It is used to designate data of one key from data for each key in AM8. This key designation pointer data x has a value from “0” to “KN”, and x =
“0” corresponds to the lowest pitch key, and x = “KN”
Corresponds to the highest pitch key. The total key number data KN is the key number data of the keyboard 1.

The touch data Tnew is data representing a touch response such as a keying speed or a keying intensity for a key having a key-on event. In the present embodiment, the difference between the times when the switches S1 and S2 are closed is described. It is. The relaxation rate data R is the old touch data Tol
This is data for reducing the amount of change of the new touch data Tnew with respect to d at a constant rate, and is set, for example, to R = 50%. This relaxation rate data R is transferred from the ROM 9 to the RAM 8 in an initialization process (step 102) described later.
Is copied to

The touch timer data Tt is data for determining a cycle (count cycle) in which the interrupt signal INT1 is generated from the touch timer 5. In the touch timer data Tt, the count cycle set by operating the up key 24 and the down key 25 when the count cycle setting mode is selected by the mode changeover switch 26 is stored.

The scan timer data St is data that determines a cycle (scan cycle) in which the interrupt signal INT2 is generated from the scan timer 6. The scan timer data St stores a scan cycle set by operating the up key 24 and the down key 25 when the scan cycle setting mode is selected by the mode switch 26.

Further, the touch timer data Tt and the scan timer data St include volume data Vol described later.
Alternatively, it is changed according to the tempo data Tmp. For example,
The scan data from the panel scan circuit 4 is sent to the CPU
7, the touch timer data Tt and the scan timer data St stored in the RAM 8 are read out, and predetermined arithmetic synthesis using the volume data Vol and the tempo data TmP in the scan data is performed. This arithmetic synthesis is performed by, for example, volume data Vol and tempo data Tmp.
May be determined, and the variable may be added, subtracted, multiplied, or divided by the touch timer data Tt and the scan timer data St, or a calculation using a function may be performed.
Look-up processing of a data table may be used.

The volume data Vol is data representing the volume set by the volume setting knob 22. The operation amount of the knob 22 is detected by the panel scan circuit 4, and the operation amount data is used as the volume data Vol. It is memorized. The tempo data Tmp is data representing the tempo set by the tempo setting knob 23, and is output by the panel scan circuit 4.
Is detected, and the operation amount data is stored as tempo data Tmp.

In an automatic performance mode in which a part of a performance part such as accompaniment and rhythm is automatically performed, the ROM 9
Volume data Vol in the automatic performance data read from
And the tempo data Tmp are copied to the register of the RAM 8. Then, the volume data V in the automatic performance data
The touch timer data Tt and the scan timer data St are changed using the ol and the tempo data Tmp.

Further, when a performance is performed using the external data input from the MIDI circuit 10, the volume data Vol and the tempo data Tmp in the external data are written into the register of the RAM 8, and these data Vo are written.
The touch timer data Tt and the scan timer data St are changed according to l and Tmp.

It should be noted that the touch timer data Tt and the scan timer data St are musical factors, that is,
Performance speed factor (tempo, ritardando, etc.), performance intensity factor (volume, forte, piano, etc.), pitch factor, timbre factor, touch factor, duration factor, stereo factor or set effect amount You may make it change according to all or some.

In this case, like the above-described volume data Vol and tempo data Tmp, these factor data are arithmetically synthesized with the touch timer data Tt or the scan timer data St. These factor data are stored in the automatic performance data to be reproduced, sent from another device via the MIDI circuit 10, or input from the keyboard 1 or panel switch group 3.

5. Memory Map As shown in FIG. 6, the RAM 8 has a switch S for each key.
Area A1 for storing ON / OFF data of the first key, and area A for storing ON / OFF data of the switch S2 for each key.
2. Area A for storing switch S1 timing data
3. Area A4 for storing on / off data of each key and area A5 for storing touch data Told for each key
Is provided.

Each key of the keyboard 1 is given a key number in order from the lowest pitch key, and data is stored for each key number in each area. The address corresponding to the key number is designated by the key designation pointer x, where x = 0 corresponds to the key number having the lowest pitch and x = KN corresponds to the key number having the highest pitch.

An area for storing the ON / OFF data of the switch S1 and an area for storing the ON / OFF data of the switch S2 are divided into two stages, and new and old ON / OFF data are stored respectively. The on / off data of the switches S1 and S2 and the key is "1" when on, and "0" when off.

In the area A1, the on / off data of the switch S1 of each key newly read is stored in the new data S1ne in a touch response process (step 108) described later.
w, and the ON / OFF data of the switch S1 of each key stored in the previous processing is stored as old data S1old.

In the area A2, in the touch response process (step 108), the on / off data of the switch S2 of each key newly read is stored as new data S2new, and the data of each key stored in the previous process is stored. The ON / OFF data of the switch S2 is stored as old data S2old.

In the area A3, for each key, timer count data TC at the time when the key is started and the switch S1 is closed is stored as data indicating the timing at which the switch S1 is closed. In the area A4, for each key, if there is a key-on event, it is rewritten to "1", in the key-on state, "1" is stored, and if there is a key-off event, it is rewritten to "0". “0” is stored in the key-off state.

In the area A5, touch data Told corresponding to a time difference from the time when the switch S1 is closed to the time when the switch S2 is closed after being corrected in a touch data correcting process (step 174) described later is stored in each area. It is stored every time. The touch data Told is used as a part of the touch factor data in the musical factor data.
It is sent from U7 to the tone generator 11.

6. Main Routine FIG. 7 is a flowchart of the main routine. This process starts when the power is turned on and ends when the power is turned off. When the power is turned on, an initialization process such as a process of clearing various registers in the RAM 8 is performed (step 102). This initialization processing (step 10
In 2), the touch timer data T
The initial value data of t is sent, and the initial value data of the scan timer data St is sent to the scan timer 6.

Thereafter, panel switch processing (step 1)
04), key on / off processing (step 106), touch response processing (step 108), MIDI processing (step 110), tone color changing processing (step 11)
2), automatic performance processing (step 114), and other processing (step 116) are repeatedly executed.

In the panel switch process (step 104), various processes related to the panel switch group 3 are performed based on the scan data input from the panel scan circuit 4 to the CPU 7.

In the key-on / off process (step 106), a key-on event and a key-off event are determined based on the scan data input from the keyboard scan circuit 2 to the CPU 7, and the key having the key-on event is determined by a musical factor. Tone data including data is formed, and data for instructing mute is formed for a key having a key-off event. In this key on / off processing, the following touch response processing (step 108) is performed.

Touch response processing (step 108)
Then, based on the ON / OFF data of the switch S1 and the switch S2, the keying start, key-on event, key-release start, and key-off event of each key are detected.
As data representing the touch response, time difference data from when the switch S1 is closed to when the switch S2 is closed is obtained.

In the MIDI process (step 110), a MIDI output process for outputting musical tone information corresponding to the operation of the keyboard 1 and the panel switch group 3 via the MIDI circuit 10, and a musical tone data input via the MIDI circuit 10. Is performed.

In the tone change processing (step 112), operation data of a tone select switch (not shown) provided in the panel switch group 3 is read from the scan data input from the panel scan circuit 4 to the CPU 7. hand,
The timbre data corresponding to the timbre selected by the timbre selection switch is read from the ROM 9 and copied to the RAM 8. This timbre data is necessary to form timbres such as waveform data unique to musical instruments such as piano, organ, violin, mandolin, flute, drum, etc., waveform data of artificial timbres other than musical instruments, envelope data, frequency characteristic data, etc. Music data.

The tone data is sent to the tone generator 11 and stored in a buffer (assignment memory) in the tone generator 11. If tone data of another tone is stored in this buffer, the tone data is rewritten with newly sent tone data. This allows
The tone generator 11 forms timbre data of the timbre selected by the timbre selection switch, and the tone system 12 produces a tone of the timbre.

In the tone generator 11, musical tone waveform data for a plurality of channels is polyphonically generated by time-division processing and sent to the sound system 12.
In the sound system 12, the musical tone waveform data input from the tone generator 11 is converted into an analog musical tone signal and emitted.

The automatic performance process (step 114) is performed when an automatic performance mode is selected by operating a performance mode changeover switch (not shown) provided in the panel switch group 3. The ROM 9 stores automatic performance data such as rhythm data, chord data, and melody data as sequence data. Then, the sequence data of the performance part selected by the automatic performance part selection switch (not shown) provided in the panel switch group 3 is copied from the ROM 9 to the RAM 8 and further sent to the tone generator 11.

In the tone generator 11, tone waveform data is formed using the automatic performance data. By sending the musical tone waveform data to the sound system 12, the musical performance of the selected performance part is automatically performed. The number of performance parts to be automatically played may be one part, a plurality of parts, or all parts.

7. Key Scan Processing FIG. 8 shows a flowchart of the key scan processing. This process is executed by an interrupt process every time the interrupt signal INT2 is input from the scan timer 6 to the CPU 7. That is, this key scan process is repeatedly executed in the scan cycle. First, on / off data S1new of the switch S1 of each key in the scan data temporarily stored in the buffer in the keyboard scan circuit 2 is read.
It is temporarily stored in a ring buffer provided in PU2 (step 122).

Next, on / off data S2new of the switch S2 of each key in the scan data is read, and this data S2new is temporarily stored in the ring buffer (step 124). Further, the touch count data TC stored in the RAM 8 is read, and the touch count data is temporarily stored in the ring buffer (step 126).

8. Touch Counter Processing FIG. 9 shows a flowchart of the touch counter processing. This process is executed by an interrupt process every time the interrupt signal INT1 is input from the touch timer 5 to the CPU 7. That is, this touch counter processing is repeatedly executed in the above-described count cycle. In this process, RA
The touch counter TC stored in M8 is incremented (step 128). Therefore, the touch counter TC is counted up in the count cycle.

In the present embodiment, the scan cycle for scanning on / off of the switches S1 and S2 provided on each key of the keyboard 1 and the count cycle for counting the time difference when the switches S1 and S2 are closed are different from each other. The resolution for detecting the on / off of the switches S1 and S2 and the resolution for detecting the time difference when the switches S1 and S2 are closed can be set separately.

Thus, for example, the switches S1 and S2
In order to increase or decrease the resolution when detecting the time difference during which is closed, it is possible to shorten or lengthen only the above-described counting period, and conversely, it is also possible to shorten or lengthen only the scanning period. .

9. Touch Response Processing FIG. 10 is a flowchart of the touch response processing (Step 108) performed in the key on / off processing (Step 106). First, ON / OFF data S1new of the switch S1 stored in the ring buffer is read, and the data S1new is stored in a predetermined area of the RAM 8 (step 132). Similarly, ON / OFF data S2new of the switch S2 is read from the ring buffer and stored in a predetermined area of the RAM 8 (step 134).

Then, the key number data is read from the ROM 9 and stored as a total key number data KN in a predetermined register in the RAM 8 (step 136). Further, the key designation pointer data x is reset to "0" (step 138). As a result, in the following processing, processing is first performed on the key with the lowest pitch.

Next, the newly read switch S
It is determined whether the on / off data S1new of the switch S1 read in the previous process is equal to the on / off data S1old of the switch S1 (step 140). If the determination in step 140 is NO, both data S1ne
Since w and S1old are different, it means that the start of keying or the key-off event has occurred. Therefore, it is determined whether or not the next keying start or key-off event has been performed (step 142). In step 142, it is determined whether the new data S1new is larger than the old data S1old. That is, when the old data S1old is “0” and the new data S1new is “1”,
It is determined that keying has been started.

Next, the touch count data TC stored in the ring buffer is read out and stored in a predetermined area of the RAM 8 as S1 timing data (step 144). Further, steps 140, 1
42, the old data S1new
It is copied to a predetermined area of the RAM 8 as 1 old (step 146). Then, the key designation pointer data x is incremented (step 154).

On the other hand, the determination in step 140 is YES.
If so, the new and old data S1new and S1old are equal, so the switch S1 remains on or off. In this case, the processing associated with the keying start or key-off event is not performed, and the processing of steps 142, 144, and 146 is skipped.

If the determination in step 142 is NO, the new data S1new is "0" and the old data S1old is "1". This means that the switch S1 has changed from on to off and a key-off event has occurred. In this case, it is determined whether or not the key map data stored in the area of the key number corresponding to the key designation pointer data x in the RAM 8 is "1" (step 148). If the key map data is "1", the key map data is cleared to "0" (step 150).

Then, a key-off process is performed (step 152). In this key-off process, data for instructing key-off is sent to the tone generator 11 for the tone of the key number corresponding to the key designation pointer data x. Thereby, by the tone generator 11,
A process of silencing the tone of the key number corresponding to the key designation pointer data x is performed.

After step 152 or step 148
Is NO, in step 146, the new data S1new is stored in the RAM as old data S1old.
8 is copied to a predetermined area. Then, the key designation pointer data x is incremented (step 15).
4).

On the other hand, the determination in step 140 is YES.
If so, the new and old data S1new and S1old are equal, so the switch S1 remains on or off. In this case, the processing associated with the keying start or key-off event is not performed, and the processing of steps 142, 144, and 146 is skipped.

If the determination in step 142 is NO, the new data S1new is "0" and the old data S1old is "1". This means that the switch S1 has changed from on to off and a key-off event has occurred. In this case, it is determined whether or not the key map data stored in the area of the key number corresponding to the key designation pointer data x in the RAM 8 is "1" (step 148). If the key map data is "1", the key map data is cleared to "0" (step 150).

Then, a key-off process is performed (step 152). In this key-off process, data for instructing key-off is sent to the tone generator 11 for the tone of the key number corresponding to the key designation pointer data x. Thereby, by the tone generator 11,
A process of silencing the tone of the key number corresponding to the key designation pointer data x is performed.

After step 152 or step 148
Is NO, in step 146, the new data S1new is stored in the RAM as old data S1old.
8 is transferred to a predetermined area. Then, the key designation pointer data x is incremented (step 15).
4).

The above processing (steps 140 to 152) is performed for all keys (steps 154 and 15).
6). As a result, for keys that have started keying,
Touch count data TC as S1 timing data
Is stored (step 144), and a key-off process (step 152) is performed for the key having the key-off event. Then, the process related to the switch S2 (step 158) is performed.

10. FIG. 11 shows a process related to the switch S2 (step 158).
The flowchart of FIG. First, the key designation pointer data x is reset to "0" again (step 16).
2). As a result, in the following processing, first, processing relating to the switch S2 is performed for the lowest pitch key.

Next, the newly read switch S
It is determined whether the on / off data S2new of the switch S2 read in the previous process is equal to the on / off data S2old of the switch S2 in the previous process (step 164). If the determination in this step 164 is NO, both data S2ne
Since w and S2old are different, it means that a key-on event or key release has been started. Therefore, it is determined whether a key-on event or a key release has been started next (step 166). In this step 166, it is determined whether the new data S2new is larger than the old data S2old. That is, when the old data S2old is “0” and the new data S2new is “1”,
It is determined that a key-on event has occurred.

In this case, next, the touch count data TC stored in the ring buffer is read and subtracted from the S1 timing data stored in the RAM 8, and the result of this operation is used as the touch data Tnew. The data is stored in the RAM 8 (step 168). That is, in step 168, the following calculation is performed.

Tnew = TC− (S1 timing data) (1) At this time, the S1 timing data read from the RAM 8 is the touch count data TC at the time when the key input is started and the switch S1 is closed. This is the data stored in step 144. Therefore, the touch data Tnew is changed from the switch S1 after the switch S1 is closed.
2 is data representing a time difference until the shutter is closed.

Next, it is determined whether or not the obtained touch data Tnew is a negative value (step 170). Here, the touch data Tnew becomes a negative value because the touch counter overflows and “S1 timing data”>
This is the case where "TC" is reached, and when it becomes a negative value, it is converted to a positive value (step 172). Touch data T
If new is a positive value, step 172 is jumped. Then, a process of correcting the obtained new touch data Tnew according to the old touch data Told obtained in the previous process (step 174) is performed. The touch data corrected by the touch data correction process (step 174) is stored in the RAM 8 as old touch data Told.

Next, it is determined whether or not the key map data stored in the key number area corresponding to the key designation pointer data x in the RAM 8 is "1" (step 176). If there is a key-on event, the key map data is "0", so the determination in step 176 is NO, and the key-on processing (step 17)
8) is performed.

In the key-on process (step 178), data for instructing a key-on, the touch data T after the correction, together with the key number data for which the key-on event has been performed.
old and other musical factor data including musical factor data are formed.
Sent to 1. In accordance with the input musical tone data, the tone generator 11 converts the input touch data Tol for the input musical tone waveform data of the pitch of the key number.
d. A tone waveform is generated / corrected according to other musical factor data. The musical sound waveform data generated by the tone generator 11 is sent to the sound system 12, and the musical sound of the key on which the key-on event has been performed is generated. Then, "1" is set to the key map data corresponding to the key designation pointer data x (step 18).
0).

After the step 180, if the judgment in the step 176 is YES and if the judgment in the step 166 is NO, then the data S2new used in the above-mentioned steps 164 and 166 is replaced by the old data S2old as the old data S2old.
The data is transferred to a predetermined area of the AM 8 (step 18).
2). If the determination in step 166 is NO, the new data S2new is "0" and the old data S2old is "1". This means that the switch S2 has changed from on to off, and key release has been started. Then, after step 182, the key designation pointer data x
Is incremented (step 184).

On the other hand, the determination in step 164 is YES
If so, the new and old data S2new and S2old are equal, so the switch S2 remains on or off. In this case, the processing associated with the key-on event or the start of key release is not performed, and the processing of steps 166 to 182 is jumped.

The above processing (steps 164 to 184) is performed for all keys (steps 184 and 18).
6). As a result, the touch data Tnew and Told of the key having the key-on event are obtained and sent to the tone generator 11 as a part of the musical sound data.

11. Touch Data Correction Process FIG. 12 shows a flowchart of the touch data correction process (step 174) in the S2 process (step 158). In this process, a correction is made to alleviate a change in the touch data Told of the key.

For example, even if the player strikes a plurality of keys on the keyboard 1 at the same speed or strength, the keys do not change exactly at the same speed or strength but slightly change. For this reason, even if a plurality of keys are continuously pressed at the same speed or intensity, the volume of the musical sound of each key may be different. Further, there is a limit to shortening the timer cycle of the touch timer 5, and the resolution of the touch count data TC cannot be increased infinitely. For this reason, even if a key with the same pitch is struck with a slightly different speed or intensity compared to the previous keying speed or intensity, touch data may greatly change. In this case, since the volume and waveform of the musical tone generated in response to the touch data change, the musical tone changes unexpectedly by the player.

Therefore, in the present embodiment, a process is provided for comparing the touch data Told stored in the previous process with the newly obtained touch data Tnew to mitigate a change in both touch data. The touch data correction process (step 174) shown in FIG. 14 is an example, and may be a process of correcting the touch data by another operation, data replacement, or the like.

First, the old touch data Told corresponding to the key designation pointer data x is read from the RAM 8 (step 190). Next, the relaxation rate data R is read from the RAM 8 (step 192). Then, the next operation is performed using the read data Told and R and the newly read new touch data Tnew (step 1).
94), the new touch data Tnew is corrected.

Told = (Tnew−Told) × R + Told (2) By this operation, the difference between the old data Told and the new data Tnew is multiplied by the relaxation rate R and added to the old data Told. The old touch data Told corresponding to the key designation pointer data x is the corrected touch data Told.
(Step 194). As a result, half the value of the change amount of the new data Tnew with respect to the old data Told becomes the change amount of the new touch data, and the change of the touch data is moderated. The above S2 processing (step 158)
Is performed for all keys, so that the touch data correction process (step 174) is also performed for all keys.

For example, even if the player intends to hit a plurality of keys at the same speed or strength, the keying speed or strength is actually different for each key. Therefore, as shown by the broken line in FIG. Data x is "0" ~
It is assumed that the new touch data Tnew corresponding to “5” has changed greatly. In this case, the change of the touch data is reduced by the touch data correction process (step 174), and as shown by the solid line in FIG.

12. Another Example of Touch Data Correction Process (1) In the above embodiment, the touch data Tol obtained for each key
An example in which d is sent to the tone generator 11 has been shown,
For example, an average value of touch data of all keys may be obtained, and the average touch data ATold may be used as touch data common to all keys. Further, the touch data of each key may be corrected based on the common touch data.

In this case, as shown by a broken line in FIG. 5, a register for storing the average touch data ATold is added. Further, the touch data correction process (step 17)
An average touch data correction process (step 200) shown in FIG. 14 is performed instead of 4).

In this process (step 200), first, R
The old touch data Told of the key corresponding to the average touch data ATold and the key designation pointer data x stored in the AM 8 are read (step 202). Next, using the read data ATold and Told and the newly read new touch data Tnew, new average touch data ATnew including the new touch data Tnew for the key having the key-on event is obtained. (Step 206). The new average touch data ATnew is obtained by a calculation for obtaining the following average value.

ATnew = (Tnew−Told) / KN + ATold (3) Average touch data ATold stored in the RAM 8
Is the new average touch data AT obtained by this calculation.
It is rewritten to new (step 206). Also, RA
The old touch data Told of the key corresponding to the key designation pointer data x of M8 is rewritten with the new touch data Tnew (step 206).

Further, in the key-on process (step 178) in FIG. 11, the average touch data AT old is set to R
The tone generator 1 is read from the AM 8 as touch data for a key having a key-on event.
Sent to 1. That is, the touch data Told obtained for each key is corrected to the average touch data ATold.

Note that the operation formula (3) for obtaining the new average touch data ATnew may be changed as follows.

ATnew = (Tnew−Told) R / KN + ATold (4) As a result, the average value obtained by relaxing the difference between the new touch data Tnew and the old touch data Told for each key by the relaxation rate R is obtained. . In this case, step 202 includes a process of reading the relaxation rate data R from the RAM 8.

Further, the key designation pointer data x is cycled from 0 to KN, firstly, the touch data Tnew is obtained for all the keys for which an ON event has occurred, and thereafter, the arithmetic processing for obtaining the average touch data ATold is executed. You may do it. New average touch data AT
new is the touch data Tne of the key that had the on event
It is obtained by dividing the sum of w by the total number of keys that had an on-event.

The touch data Tnew of each key having an on-event is the same average touch until the key designation pointer data x returns to 0 and the touch data Tnew of the key having an on-event is obtained. The data is replaced with the data ATnew and sent to the tone generator 11.

13. Another Example of Touch Data Correction Process (2) The average touch data ATold may be an average value for each octave. In this case, the average touch data ATold for each octave as shown in FIG.
Is added. The keyboard 1 has M octave keys. And
The average touch data correction process shown in FIG.
0) is slightly changed.

First, at step 202, when the average touch data ATold is read, it is determined which octave key is designated by the key designation pointer data x. For example, it is determined by a lookup process of a data table in which the key designation pointer data x and the octave value are associated. Alternatively, the upper limit value data of x included in each octave is stored in the RAM 8, and the determination is made by comparing the key designation pointer data x with each upper limit value data. Then, key designation pointer data x
Touch data ATol corresponding to the octave to which the
d is read from the RAM 8.

In step 204, the number of keys in one octave is used instead of the total number of keys KN in the above equations (3) and (4). Thus, the average value ATnew of the touch data in one octave including the new touch data Tnew for the key having the key-on event is obtained. Then, in step 206, the average touch data ATold corresponding to the octave to which the key designation pointer data x belongs is rewritten to the new average touch data ATnew.

The range for obtaining the average touch data ATold is not limited to the entire key range or every octave, but may be a certain range, a predetermined range of keys, a range set by a player, or the like. Then, the average touch data ATold is obtained for each of these ranges, and is used as common touch data for each of these ranges, and the touch data Tnew for each key is corrected using the common touch data.

14. Another Example of Touch Data Correction Process (3) As described above, when a plurality of keys are continuously pressed, the touch response is often the same. In this case, the keying time differences (keying speed or keying strength) are almost the same, and each key should be keyed continuously.

Therefore, the key K having the key-on event
A time T2a when the switch S2 of a is turned on is detected, and the time difference (T2b) from the time T2b when the switch S2 of the key Kb having the next key-on event is turned on is detected.
−T2a), and the key K is determined according to the magnitude of the time difference.
The touch data Tnew or the relaxation rate R for b may be corrected. As a result, the degree of correction of the touch data can be changed depending on the number of key presses per unit time.

The touch data is a musical factor, that is, a performance speed factor (tempo, ritardand, etc.), a performance intensity factor (volume, forte, piano, etc.), a pitch factor, a timbre factor, a touch factor. , The length factor, the stereo factor, or all or part of the set effect amount.

In this case, like the above-described volume data Vol and tempo data Tmp, these factor data are arithmetically synthesized with the touch timer data Tt or the scan timer data St. These factor data are stored in the automatic performance data to be reproduced, sent from another device via the MIDI circuit 10, or input from the keyboard 1 or panel switch group 3.

15. Other Modifications The present invention is not limited to the above-described embodiment, and can be variously modified without departing from the spirit of the present invention. For example, the value of the relaxation rate R may be variable. Also, in both cases where the relaxation rate R is fixed or variable, the same relaxation rate R may be applied to all keys, or the relaxation rate R may be different for each certain range, for example, for each octave. good.

Further, in the above-described embodiment, an example has been described in which the time difference data at which the switches S1 and S2 provided on the keys are turned on is used as the touch data. However, the operating means for generating the time difference data is a mechanical switch. There is no limitation, and any operation means such as an optical switch, a proximity switch, a touch switch, and a pressure sensor may be used as long as they operate with a time lag according to the key operation of the key.

[0107]

As described above in detail, according to the present invention, the scanning cycle of the operation of the plurality of operation means provided corresponding to each of the plurality of sound generation instruction means, The cycle for counting the operation time difference can be set to a different cycle, and the resolution for detecting the operation of the plurality of operation means and the resolution for detecting the operation time difference between the operation means can be set separately. . This allows
For example, in order to increase the resolution when detecting the operation time difference of the operation means, only the cycle for counting the operation time difference of the operation means can be shortened, and vice versa.

Further, according to the present invention, the touch data of the sounding instruction means is obtained, and the newly detected touch data is corrected so that the difference between the past touch data and the newly detected touch data is reduced. Thereby, a change in touch data can be reduced.

Thus, it is possible to prevent the touch data from fluctuating greatly and generating a touch response contrary to the player's intention when the keying speed or the keying intensity of the player is not constant. Similarly, since the resolution at the time of detecting the operation time difference of the operation means is insufficient, even when the error between the detected operation time difference and the actual operation time difference increases, it is possible to reduce the change in the touch data. it can.

[Brief description of the drawings]

FIG. 1 is an overall circuit diagram of an electronic musical instrument.

FIG. 2 is a plan view showing a part of a panel switch group 3;

FIG. 3 is a side view showing switches S1 and S2 provided on a key.

FIG. 4 is a timing chart showing a relationship between ON / OFF of switches S1 and S2 and key ON / OFF.

FIG. 5 is a diagram showing a part of a register group provided in a RAM 8;

FIG. 6 is a data map diagram provided in a RAM 8;

FIG. 7 is a diagram showing a flowchart of a main routine.

FIG. 8 is a diagram showing a flowchart of a key scan process.

FIG. 9 is a diagram illustrating a flowchart of a touch counter process.

FIG. 10 is a diagram illustrating a flowchart of a touch response process.

FIG. 11 is a diagram showing a flowchart of an S2 process.

FIG. 12 is a diagram illustrating a flowchart of a touch data correction process.

FIG. 13 is a diagram showing touch data Tnew and touch data after correction.

FIG. 14 is a diagram illustrating a flowchart of an average touch data correction process.

FIG. 15 is a diagram showing a storage area map of average touch data provided in a RAM 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Keyboard, 2 ... Keyboard scan circuit, 3 ... Panel switch group, 4 ... Panel scan circuit, 5 ... Touch timer, 6 ... Scan timer, 7 ... CPU, 8 ... RA
M, 9 ROM, 10 MIDI circuit, 11 tone generator, 12 sound system, 21 LCD,
22: knob for volume setting, 23: knob for tempo setting,
24 ... Up switch, 25 ... Down switch, 26 ...
Mode switching switch, K ... key, S1, S2 ... switch.

Claims (7)

[Claims] 1. A plurality of sounding instruction means for instructing sounding of a musical tone are provided corresponding to each of the plurality of sounding instruction means, and operate with a time lag according to the sounding operation of the sounding instruction means. The operation of the operating means is scanned for the plurality of operating means, the scanning cycle is determined as the first cycle, and the time difference between the operations of the plurality of operating means is detected for each of the sounding instruction means. The touch detection device is characterized in that a count cycle of the detected time difference is determined as a second cycle, and the first cycle is different from the second cycle. 2. The first cycle and the second cycle,
Claims characterized by being changed or different according to a performance speed factor, a performance intensity factor, a pitch factor, a timbre factor, a touch factor, a pitch factor, a stereo factor, or a set effect amount. Item 2. The touch detection device according to Item 1. 3. A plurality of sounding instruction means for instructing sounding of a musical tone, detecting a speed or intensity of a sounding operation of the sounding instruction means and storing the detected touch data. 3. The touch detection device according to claim 1, wherein the newly detected touch data is corrected so that a difference between the past touch data and the newly detected touch data is reduced. 4. 4. The method according to claim 3, wherein touch data is stored for each of said plurality of sounding instruction means, and touch data is corrected for each of said sounding instruction means.
The touch detection device according to any one of the preceding claims. 5. Touch data common to all of the plurality of sounding instruction means or sounding instruction means for each range is stored, and the touch data of each sounding instruction means is stored based on the stored touch data. The touch detection device according to claim 4, wherein the touch detection device corrects the touch. 6. The correction content of the touch data includes a performance speed factor, a performance intensity factor, a pitch factor,
Tonal factor, touch factor, duration factor,
The touch detection device according to claim 4, wherein the touch detection device is changed or different according to a stereoscopic factor or a set effect amount. 7. A plurality of activation signals are provided for each of a plurality of sounding instruction means for instructing sounding of a musical tone, and a plurality of operation signals having a time difference from the start of the sounding operation to the end of the sounding operation. Based on the generated operation signal, the start of sound generation is determined for each of the sounding instruction means. The scanning cycle is determined by determining the scanning cycle, and the scanning cycle information for setting the scanning cycle is generated by a manual operation. According to the generated scanning cycle information, Changing the determined scanning period, modifying the determined scanning period according to all or a part of the musical factor, and generating time of the generated activation signal. Detecting each sounding instruction means, different from the determination of the scanning cycle, determining the counting cycle of the time when the detected operation signal is generated, and performing the counting by manual operation. Generating count cycle information for setting a cycle, changing the determined count cycle in accordance with the generated count cycle information, and changing the count cycle in accordance with all or a part of a musical factor; Correcting the determined counting period, based on the time when the detected activation signal is generated,
For the sounding instruction means for which the start of the sounding is determined, the time difference of generation of the operation signal is obtained for each sounding instruction means. Touch data indicating the speed or intensity of the operation is generated, and the generated touch data is stored for each sounding instructing means. The newly generated new touch data and the stored new touch data are stored. A difference from the past touch data is obtained, and the newly generated new touch data is subjected to a calculation based on the obtained difference between the touch data and a predetermined or variably set correction value, and The new touch data is corrected so as to reduce the difference, and the average value of the generated touch data of all the sound generation instruction means is obtained. The average value of the generated touch data is obtained for each octave. The average value of the generated touch data is obtained for a predetermined or variably set range. Calculating the average value of the touch data of all the sounding instruction means, the average value of the touch data for each octave, or the average value of the touch data in the predetermined or variably set range for the new touch data. Or by replacing the new touch data with the average value of the touch data so as to reduce the difference between the touch data.