JPH037118B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic musical instrument that can input data corresponding to an envelope waveform and display the envelope waveform.

Generally, in electronic musical instruments, the envelope is set using a multi-contact slide switch or a rotating volume. However, it is difficult to recall envelope waveforms related to these inputs, and improvements in operability have been desired.

This invention has been made in view of the above points, and according to the first invention, in the display means,
The envelope waveform can be displayed, and the specifying means specifies a specific position on the envelope waveform displayed by the display means, and in response to the instruction to start sounding from the indicating means, the envelope waveform that has been input in advance is displayed. The electronic musical instrument outputs the data corresponding to the specified position up to the specified position, maintains the envelope waveform level at this specified position, and outputs the data corresponding to the remaining envelope waveform from the output means in response to a mute start instruction. provided.

Further, according to the second invention, in the display means,
The envelope waveform can be displayed, and a specific section can be specified by the specifying means on the envelope waveform displayed by the display means, and the envelope waveform inputted in advance can be displayed in response to a sound generation start instruction from the specifying means. The apparatus outputs the data corresponding to the specified section up to the specified section, repeatedly outputs the data corresponding to the envelope waveform of this specified section, and outputs the data corresponding to the remaining envelope waveform from the output means in response to a mute start instruction. Electronic musical instruments are provided.

An embodiment in which the present invention is applied to an electronic organ will be described below with reference to the drawings.

In FIG. 1, an electronic organ 1 includes support legs 2,
2, and the fuselage 8 supported by these support legs 2, 2.
It is composed of. A keyboard 4 having a plurality of keys for specifying musical tones of each pitch, a speaker 5, and an operation section 6 are provided on the body 3, as shown in the figure. Furthermore, the operation unit 6 includes a power switch 7,
Mode changeover switches 8 for specifying performance mode, preset mode, etc. are provided as shown in the figure, and the keyboard 4 is provided with 48 keys of pitches _C2 to _B5 . In addition, an envelope waveform instruction display section 9 consisting of a touch switch and a liquid crystal device is provided on the body 3.

As shown in FIG. 2, the envelope waveform instruction display section 9 has a rectangular display panel with 10 rows n1 to n8, KEYOFF, SUS, and 32 columns m1 to m1.
It consists of (10 x 32) indicating display elements arranged in m32 array. Then, the performer can input the desired envelope waveform by touching each of the above instruction display elements, with time on the horizontal axis and peak value on the vertical axis, and the input envelope waveform is displayed on the envelope waveform instruction display. It is displayed on the liquid crystal display in section 9.

Each instruction display element of the envelope waveform instruction display section 9 is constructed as shown in FIG. 3A.

That is, in FIG. 3A, 10 is a liquid crystal display device. This liquid crystal display device 10 includes a transparent first electrode 10 that forms a character pattern (KEYOFF or SUS) to be displayed on the instruction display section 9 or a mask pattern for mask display.
c, glass plate 10 on which the second electrode 10d is wired;
a, 10b, and a liquid crystal 10e sealed between them. Note that the polarizing plate is omitted in FIG. 3A.

On the top surface of this liquid crystal display device 10 is a transparent substrate 12 on which wiring for the touch switch 11 is provided.
is installed. In this touch switch 11, one electrode is a positive electrode and the other electrode is a negative electrode, and by pressing the touch switch 11 with a finger, the connection between the two electrodes is turned on.

Further, each touch switch 11 uses a bright electrode so as not to interfere with the display during liquid crystal display.

The rest of the transparent substrate 12 except for the touch switch 11 is covered with a cover 18 to protect the electrode wiring.

FIG. 3B shows another example of the instruction display section 9, in which the same parts as in FIG. 3A are given the same reference numerals. In FIG. 3B, the cover 18 has a guide 13a standing up around the touch switch 11.
, and the person operating the touch switch 1
The location of point 1 can be easily recognized.

Next, the circuit configuration will be explained with reference to FIG. A quick pulse CP of a predetermined frequency outputted from the oscillator 21 is inputted to the counter 22, frequency-divided, and then given to the key matrix 28 and the key code data assigner 24. The key matrix 28 consists of each key of the keyboard 4 being wired in a matrix.
In addition, each key is scanned by the frequency-divided signal output from the counter 22, and an on/off detection signal indicating the key press state is output, and the key code data assigner 24
give to The key code data assigner 24 is driven by the frequency division signal, and outputs a pitch signal for specifying the pitch and a trigger signal for determining the envelope based on the input on/off detection signal. , a treble signal is given to the musical tone generator 25, and a trigger signal is given to the envelope control circuit 26. Note that this trigger signal is a signal indicating key-on and key-off.

The musical tone generator 25 outputs a musical waveform signal having a predetermined waveform as a signal having a predetermined pitch frequency based on the pitch signal given from the key code data assigner.

Further, an output signal from a touch switch matrix 27 consisting of touch switches 11 of the envelope waveform instruction display section 9 is applied to the envelope control circuit 26 via an input display control section 28 as envelope data. That is, for every 32 touch operations on row n1 of the envelope waveform instruction display section 9, 5-bit envelope waveform data of "00000" is sent from the control section to the envelope control circuit 26.
given to. Similarly, n2, n3, n4, n5, n6, n7,
"00001" for each touch operation on each instruction display section of n8,
"00010", "00011", "00100", "00101",
Code data “001110” and “00111” are output from the input display control unit 28. Further, envelope waveform data of "01000" is output from the input display control section 28 for every 32 touch operations on the row KEYOFF of the envelope waveform display section 9, and envelope waveform data of "10000" is output for every 32 touch operations on the row SUS. Waveform data is output from the input display control section 28.

These 5-bit envelope waveform data are then given to and stored in an envelope control circuit 26, which will be described later. Envelope control circuit 26
generates and outputs an envelope waveform signal based on the envelope data from the input display control section 28 and in response to the trigger signal from the key code data assigner 24, and supplies it to the multiplier 29. The multiplier 29 multiplies the musical tone signal and the envelope waveform signal, outputs an envelope-controlled musical tone signal, and supplies the signal to the D/A converter 80 . The D/A converter 80 converts the musical tone signal into an analog musical tone signal, and the amplifier 3
Supply to 1. Then, this analog signal is amplified by the amplifier 81, and the sound is emitted from the speaker 5.

Further, the input display control section 28 is operated by the clock pulse CP and dynamically drives the liquid crystal display device 10 according to a predetermined driving method. It is configured to output to the device 10.

Next, details of the envelope control circuit 26 will be explained with reference to FIG. The envelope control circuit 26 includes a control section 26-1, an envelope waveform storage section 26-2 consisting of a RAM, etc., an address counter 26-8, and an interpolation circuit 26-4. The control section 26-1 is supplied with envelope data from the input display control section 28 and is also given a trigger signal from the key code data assigner 24.

Then, in the envelope waveform storage section 26-2,
When storing envelope data, input the envelope data from the control unit 26-1 to the input terminal IN.
After setting the address by supplying a predetermined address signal to the address counter 26-8, the read/write signal R/W is stored as "1". In this way, the address counter is sequentially incremented, and in this embodiment, envelope data of 32 steps (each step consists of 5 bits) is set in the envelope waveform storage section 26-2.

The envelope data stored in the envelope waveform storage section 26-2 is based on the envelope data from the input display control section 28 described above, but for each step, the lower 3 bits are used to indicate the envelope value (same step value). If two or more touch switches are pressed ((Figure 6 B or C)
Reference)) takes the data with larger values. ), and the upper 2 bits, that is, the KEYOFF bit, and
This shows a control flag that performs special control of the envelope using SUS bits.

This envelope waveform storage section 26-2
When reading envelope data from the address counter 26-1, that is, when a trigger signal indicating key-on is given from the key code data assigner 24, the envelope clock is transferred from the control section 26-1 to the address counter 26-1.
3, and while incrementing the address sequentially, the output terminal OUT of the envelope waveform storage section 26-2
Read the corresponding envelope data from. Note that this address counter 26-3 is divided into an upper bit side (counts 32 steps) and a lower bit side (consists of a predetermined number of bits).
The data on the upper bit side determines the address of the envelope waveform storage section 26-2, and the data on the lower bit side is applied as an interpolation value to the interpolation circuit 26-4. Therefore, the interpolation circuit 26-4 further divides the envelope data of each step and performs linear interpolation, for example, to generate and output an actual envelope waveform signal.

Further, the outputs of the address counter 26-3 and the envelope waveform storage section 26-2 are transmitted to the control section 26-3.
-1 is also given, and the most significant bit data (SUS bit) of the envelope data is “1”.
, the address is sent to the control unit 26-1.
The second bit data (KEYOFF) of the envelope data can be stored in a specific register within the envelope data.
becomes “1”, the address counter 26
-3 is stopped, or after the address data stored in the specific register is transferred to the address counter 26-3, the address increment is started. The specific operation will be described later.

Next, the operation of the above embodiment will be explained. When the power switch 7 is first turned on at the start of a performance, power is supplied to the electronic organ 1, and the oscillator 21 starts oscillating. Therefore, the clock pulse CP begins to be output, and the frequency division signal begins to be output from the counter 22, and each circuit in FIG. 4 becomes operational.

Next, after setting the mode changeover switch 8 to the preset mode, each instruction display element of the envelope waveform instruction display section 9 is operated to preset a desired envelope waveform. For example, as shown in FIG.
n1), touch switch 11,
11 is turned on by human body resistance, and the on signal is input to the input display control section 28. Therefore, a first electrode drive signal and a second electrode drive signal for lighting each instruction display element that has been turned on are outputted from the input display control section 28 and given to the liquid crystal display device. Therefore, each instruction display element of the envelope waveform instruction display section 9 that is turned on is displayed each time it is turned on, and the display continues thereafter, so that the preset envelope waveform can be easily checked visually. can. On the other hand, for the preset input of the envelope waveform instruction display section 9, the corresponding envelope data "00000", "00001", . . . "00000" are supplied to the envelope control circuit 26 via the input display control section 28.

Therefore, the control section 26-1 in the envelope control circuit 26 inputs and sets the data of 32 steps to the envelope waveform storage section 26-2 while controlling the address counter 26-8. In this way, envelope data of 5 bits x 32 steps is set in the envelope waveform storage section 26-2.

After setting the mode changeover switch 8 to the performance mode, when a key on the keyboard 4 is operated, an on/off detection signal output from the key matrix 28 is processed by the key code data assigner 24.
A pitch signal and a trigger signal corresponding to the operating key are outputted from the key code data assigner 24 and given to the musical tone generator 25 and the envelope control circuit 26. For this reason, the musical tone generator 25 outputs a musical waveform signal of a desired scale based on the applied pitch signal, and supplies it to the multiplier 29 .

Further, the envelope waveform signal is supplied to the multiplier 29 from the envelope control circuit 26 . That is, the envelope control circuit 26 starts sending an envelope clock to the address counter 26-3 in response to a trigger signal given from the key code data assigner 24.

Therefore, the address counter 26-3 increments its contents each time the envelope clock arrives, uses the upper bit data to specify the address of the envelope waveform storage section 26-2, and uses the lower bit data to specify the address of the envelope waveform storage section 26-2. Interpolation processing is performed in .

In this way, the level of the envelope waveform signal output from the interpolation circuit 26-4 is adjusted as shown in FIG.
As shown in the figure, the signal rises immediately upon key-on, and after reaching the highest level, it gradually declines.
Therefore, if the envelope waveform is set as shown in FIG. 6A, an envelope similar to a so-called plucked string sound such as a piano sound will be applied.

The multiplier 27 multiplies the musical sound waveform signal from the musical tone generator 25 by the envelope waveform signal from the envelope control circuit, and transmits the resulting musical sound signal via a D/A converter 80 and an amplifier 81. , the sound will be emitted from the speaker 5.

The above is the operation when the envelope waveform shown in FIG. 6A is set on the envelope waveform instruction display section 9. Next, the case where the envelope waveform shown in FIG. 6B is set will be explained.

That is, as shown in FIG. 6B, a touch operation is performed on the instruction display element of step KEYOFF of m11. As a result, the envelope data of this step m11 becomes "01100" and
“KEYOFF” will continue to be displayed from then on. Note that when two or more instruction display elements are operated in one step as shown in FIG. 6B, a large value is set for the level. For example, the envelope data at step m2 is "00010".

In this way, after the 32-step envelope data is set in the envelope waveform storage section 26-2 under the control of the control section 26-1, the performance mode is set by operating the mode changeover switch 8, and then the keys of the keyboard 4 are set. operate.

The envelope control circuit 26 starts operating in response to a trigger signal from the key code data assigner 24. Then, from this key-on time, step m
Envelope data 1 to m10 are read out by inputting the envelope clock and applied to the multiplier 29. Then, when it comes to step m11,
The controller 26-1 detects that the second bit of the envelope data is "1" and stops supplying the envelope clock to the address counter 26-3 until the key is turned off. Therefore, the envelope is maintained at a so-called sustain level. Then, when a trigger signal representing key-off is given in response to a key release operation, the envelope clock is supplied from the control section 26-1 to the address counter 26-3 again, and the contents of the envelope waveform storage section 26-2 are It is read out sequentially and an attenuation envelope is added to the musical waveform signal.

FIG. 7B shows the change in envelope level obtained when the envelope waveform instruction display section 9 is set as shown in FIG. 6B.

Next, a case will be described in which the envelope waveform instruction display section 9 is set as shown in FIG. 6C.
That is, while performing a touch operation on the SUS instruction display element of step m8,
Touch the KEYOFF instruction display element.

As a result, the envelope data of step m8 becomes "10100", and the envelope data of step m15 becomes "01011".
In addition, the corresponding displays "SUS" and "KEYOFF" will continue to be displayed thereafter. Incidentally, envelope data of other steps are similarly input and set to the envelope waveform storage section 26-2.

When reading out this envelope data, steps m1 to m7 are as shown in FIG. 6A and B above.
However, at step m8, the control unit 26-1 determines that the most significant bit is "1", and the address counter 26-1 determines that the most significant bit is "1".
3, that is, the address data (upper bits only) indicating step m8, is sent to the control unit 26-
Set to a specific register within 1. Subsequent steps m8 to m15 are processed in the same way, but in step m15, the output of the second bit is "1", so the control section 26-1 processes this step m1.
Continuing to step 5, the address data of step m8 is preset in the address counter 26-3.

In this way, steps m8 to m15 are repeated until the key is turned off. Therefore, as shown in FIG. 7C, when the envelope reaches the sustain level, it repeats the same waveform with a period T.

Then, when the key is released, step m1
5 to m32 are performed to add an attenuation envelope to the musical tone signal.

In the above embodiment, the envelope control circuit 2
Although the envelope waveform storage section 26-2 in the envelope waveform storage section 26-2 in the envelope waveform storage section 26-2 is configured to store one type of envelope data, the present invention is not limited to this, and a plurality of envelope data may be stored. All you have to do is use envelope data.

In the above embodiment, the touch switch 11 presets the envelope waveform on the envelope waveform instruction display section 9, and the liquid crystal display 10 displays the preset envelope waveform data.
Although the configuration is such that the above-mentioned means are arranged in a polymerized manner, the present invention is not limited to this, and a configuration may be adopted in which both of the above-mentioned means are provided separately. In addition, although a liquid crystal display device was used as a flat panel display control in which both of the above means are combined, it is also possible to use not only a light-receiving type of display control but also a light-emitting type display control. Touch switches can also be formed directly on the display panel.

Furthermore, in the above embodiment, an electronic organ with a single tone output was shown, but in an electronic organ with a multiple tone output, the circuits shown in FIGS. The signaling system is well known and will therefore be omitted.

Further, in the above embodiment, it is possible to input the envelope waveform as shown in FIGS. 6A to 6C, but the value stored in the storage means is not limited to the amplitude value of the envelope. The value (change value of the envelope) may be stored, and the contents of the data stored in the storage means can also be modified in various ways.

As explained above, according to the electronic musical instrument of the first invention, the display means can display the envelope waveform, and the designation means can specify a specific position on the envelope waveform displayed on the display means. In response to the sound generation start instruction from the instruction means, the data corresponding to the envelope waveform input in advance is output to the above-mentioned specific position, and the envelope waveform level at this specific position is maintained, and in response to the mute start instruction. An electronic musical instrument is provided that outputs data corresponding to the remaining envelope waveform from the output means, so that by displaying the envelope waveform,
No matter what kind of envelope is set, it is easy to understand, and moreover, it is possible to generate a preferable envelope that includes maintaining the envelope waveform level at a specific position in response to the start of sound generation and the start of muting.

Further, according to the second invention, in the display means,
The envelope waveform can be displayed, and a specific section can be specified by the specifying means on the envelope waveform displayed by the display means, and the envelope waveform inputted in advance can be displayed in response to a sound generation start instruction from the specifying means. The apparatus outputs the data corresponding to the specified section up to the specified section, repeatedly outputs the data corresponding to the envelope waveform of this specified section, and outputs the data corresponding to the remaining envelope waveform from the output means in response to a mute start instruction. Since the electronic musical instrument is provided, it is easy to understand what kind of envelope is set by displaying the envelope waveform, and it also includes repeating the envelope of a specific section in response to the start of sound generation and the start of mute. Able to generate favorable envelopes.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an external perspective view of an electronic organ, FIG. 2 is a plan view of an envelope waveform indication display section, and FIGS. 3A and B are cross sections of the envelope waveform indication display section. 4 is a circuit configuration diagram of the entire electronic organ, FIG. 5 is a detailed diagram of the envelope control circuit, FIGS. 6 A to C are diagrams showing evaluation states of the envelope waveform instruction display section, and FIGS. 7 A to
C is a diagram showing temporal changes in the envelope signal. 9... Envelope waveform instruction display section, 10...
Liquid crystal display section, 11...Touch switch, 26...
Envelope control circuit, 26-1...control unit, 2
6-2... Envelope waveform storage unit, 26-3...
. . . address counter, 27 . . . touch switch matrix, 28 . . . input display control section, 29 . . . multiplier.

Claims (1)

[Scope of Claims] 1. Waveform data input means for inputting data corresponding to an envelope waveform for envelope control; display means for displaying an envelope waveform corresponding to data input by the waveform data input means; a specifying means for specifying a specific position on the envelope waveform displayed on the display means; an instructing means for instructing start of sound generation and start of muting; Outputting the data corresponding to the envelope waveform that has been performed up to the specific position specified by the above-mentioned specifying means, maintaining the envelope waveform level at the specific position, and outputting the data corresponding to the remaining envelope waveform in response to the muffling start instruction. An electronic musical instrument characterized by comprising: an output means for outputting an output; 2. A waveform data input means for inputting data corresponding to an envelope waveform for envelope control; a display means for displaying an envelope waveform corresponding to the data input by the waveform data input means; a specifying means for specifying a specific section on the envelope waveform; an instructing means for instructing the start of sound generation and the start of mute; and a means for specifying the start of sound generation in response to the instruction to start sound generation from the instructing means, corresponding to the envelope waveform input by the waveform data input means. output means for outputting the data corresponding to the envelope waveform of the particular interval up to a specific section specified by the above-mentioned specifying means, repeatedly outputting the data corresponding to the envelope waveform of the specific section, and outputting the data corresponding to the remaining envelope waveform in response to the muting start instruction. An electronic musical instrument characterized by comprising: and.