JPH07104671B2 - Electronic musical instrument signal converter - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic musical instrument, and more particularly, it matches timing with a signal from a touch-sensitive input device (for example, an analog trigger signal generating device including a drum pad or the like). The present invention relates to a signal conversion device that outputs a tone control signal to an electronic tone generator.

[Background of the Invention] In an electronic musical instrument with a conventional signal converter, an analog trigger generator and a musical sound generator activated by the analog trigger generator are fixedly coupled via the signal converter. Also,
The signal conversion device also only performed a simple conversion operation.

FIG. 5 shows an example of this type of conventional device. This drawing shows the structure for one drum, and actually has the structure for the number of drums used. In the figure, elements 1P to 4P constitute an analog trigger generator, 5P corresponds to a signal converter, and 6P and 7P constitute a musical tone generator. Note that 8P is an audio device including an amplifier and a speaker. In operation,
In this electronic musical instrument, a piezoelectric pickup 2P attached to a vibrating plate 1P called a drum pad converts a vibration caused by a hit by a drum stick 3P into an analog electric signal as shown in FIG. 6 (A). This analog signal is converted by the envelope extraction circuit 4P into an envelope signal as shown in FIG. 6 (B), and further, as shown in FIG. 5 (C) by the envelope generation circuit 5P, depending on the striking force of the drum stick 3P. An envelope is generated. With this envelope signal, the sound source signal from the sound source circuit 6P is AM-modulated by a multiplier or modulator 7P to generate a musical tone waveform signal, which is emitted through the acoustic device 8P.

In this conventional device, the input to the drum pad,
It always produces musical tones with the same pitch and almost the same tone, and lacks flexibility.

In order to solve such a lack of flexibility, the same applicant proposes an electronic musical instrument that digitizes and intelligentizes the signal conversion unit to enable a wide variety of performances. In particular, in this application, the envelope signal extracted by the envelope extraction circuit (analog trigger signal) is digitally analyzed by the signal conversion unit, and when the level becomes higher than a predetermined value, a key-on command as a tone control signal,
Further, a volume level command is given to the musical tone generating device according to the detected maximum level, and a key-off command is given to the musical tone generating device when the level falls below a certain value.

[Object of the Invention] The present invention is a further improvement of the invention according to the above-mentioned patent application. The object of the present invention is to generate musical sound parameters of different values with respect to the same analog trigger signal input. It is an object of the present invention to provide a signal conversion device which can be sent to a device and which enables a user to freely construct various electronic musical instrument systems.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention corresponds to a striking member to be striking operation, and a striking state that is provided on the striking member and is hit each time the striking member is hit. A striking signal detecting means for outputting a striking detection signal in real time, an A / D converting means for converting the striking detection signal from the striking signal detecting means into a digital striking detection signal, each time the member to be hit is hit, In response,
An output value detecting means for detecting whether or not the output value of the digital batting detection signal output from the A / D converting means is equal to or more than a preset set value, and the digital batting by the output value detecting means From the time when it is detected that the output value of the detection signal is equal to or more than the set value, a predetermined number of the digital batting detection signals are saved and the maximum output value among the saved output values of the digital batting detection signals is set. The maximum output value detecting means for detecting, the parameter output means for outputting a tone parameter having a value corresponding to the maximum value detected by the maximum output value detecting means, and the tone parameter output from the parameter outputting means Setting means for setting and outputting different types of parameter values, and the musical tone parameter output from the parameter output means and the setting means. The main point is to provide a control means for instructing the generation of a musical tone having a musical tone characteristic according to the value of the meter.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of an entire electronic musical instrument including a signal conversion device according to an embodiment of the present invention. Elements 10, 11, 12, and 13 form an analog trigger signal generator, 14, 9, and 20 form a signal converter, and 27 forms a tone generator. In this electronic musical instrument, eight analog trigger signal generators are used. As will be described later in detail, the signal converter can freely set parameters such as tone color, pitch, and channel to be assigned to each analog trigger signal generator (each line). At the time of performance, the user (player) hits eight drums with a drum stick to perform the performance. As a result, an analog signal is generated from the corresponding analog trigger signal generator and input to the signal converter. The signal conversion device gives a musical tone control signal to the musical tone generating device at the timing at which the analog signal is generated. This tone control signal includes, in addition to the key-on command and volume level designation (these commands and instructions are determined by the level analysis of the input signal), the channel designation, tone color designation, and pitch designation information according to the settings. The tone generation device operates a designated channel in accordance with the tone control signal sent thereto to generate a tone signal of a specified tone color, pitch and volume. The generated tone signal is emitted through the speaker.

More specifically, 10 is a drum pad, and when the drum stick 12 strikes the drum pad 10, its vibration is picked up by the piezoelectric pickup 11 and converted into an analog electric signal. This analog electric signal representing the vibration is input to the corresponding envelope extraction circuit 13 via the input terminals 1-1 to 1-8 (see FIG. 2).

The envelope extraction circuit 13 has an operational amplifier 16 and a coupling capacitor 15 that cuts a DC component on its non-inverting input side.
Is connected to a resistor 23 which is grounded. A diode 17 is coupled to the output side of the operational amplifier 16 and its cathode side is
Grounded time constant circuit, capacitor 18 and resistor 19
Are combined. Further, the cathode side of the diode 17 is fed back to the inverting input of the operational amplifier 16 via a variable resistor VR adjusted by a sensitivity adjusting volume 2 (see FIG. 2) described later. The value of the variable resistor VR determines the gain and thus the sensitivity. Moreover, the response characteristic is temporarily determined by the time constant circuit.

The A / D converter 14 converts the 8-line envelope signal output from the envelope extraction circuit 13 into a corresponding digital signal. Conversion by microcomputer 20 8
It is performed in time with the time division processing for the input data of the line. That is, the microcomputer
20 time-divisionally drives the eight gates 24 that make up the multiplexer, and the A / D converter 1 is operated during the time slot between each gate.
Causes 4 to perform A / D conversion. More specifically, the microcomputer 20 selects the gate associated with G1 during line 1 selection.
24 is opened, an A / D start signal is output, and conversion is requested to the A / D converter 14. In response to this, the A / D converter 14 executes A / D conversion, and when the conversion is completed, sends an end command signal back to the microcomputer 20. In response, the microcomputer 20 takes in the converted data, then selects the line 2, opens the gate associated with G2, ie the gate 24 for the second analog trigger generator, and repeats the above operation.

The microcomputer 20 is the central part of the signal conversion device, and ROM 26 for storing programs, various data such as key-on designation code, key-off designation code, volume level designation code, tone color designation code, pitch (note) designation code, channel designation code. , A RAM 22 for storing data etc. input from the A / D converter 14, an ALU 25 for executing various operations,
It has a software timer 21 used to analyze the input data from the A / D converter 14.

The main function of the microcomputer 20 is a data setting mode (EDIT mode), in which a setting parameter from the parameter setting / display unit 9 which is an input / output device is set in the RAM 22 inside the microcomputer 20 or set in the RAM 22. In addition to displaying the parameter data on the display unit 9, in the play mode (PLAY mode), the data input from the A / D converter 14 is analyzed, and the musical tone control signal is sent to the musical tone generator 27 according to the analysis result. Is to be output.

As described above, the microcomputer 20 causes the A / D converter 14, which is an interface of a plurality of (here, eight) analog trigger signal generators, to convert the data according to the generation source in a time-division method, and outputs the result. I am capturing.
The input data level analysis processing in time-division format performed by the microcomputer 20 will be briefly described here. That is, in this data level analysis, the microcomputer
For 20, check the size of the data input from the A / D converter 14, and if it exceeds a certain value (trigger level),
The input data is saved in RAM22. The microcomputer 20 then performs peak detection to detect the maximum value emitted by the associated analog trigger signal generator (to be precise, save a predetermined number of data after the trigger level and find the maximum value). Therefore, the strength of hitting the drum stick 12 against the drum pad 10 is estimated. According to the magnitude of this maximum value, the volume level is specified and a key-on command is issued to the musical sound generating device 27. The microcomputer 20 then continues to monitor the input data level and a timer is triggered if it falls below a certain level.
21 is started, and when the timer 21 times out while the level is low, a key-off command is issued to the musical sound generator 27.

In this embodiment, when issuing a key-on command, the microcomputer 20 attaches various parameter data and sends it to the musical tone generator 27. The attached information is a channel designation code, tone color program designation code, and pitch designation code set for each input data generation source. The channel designation code is a command that designates the channel used on the tone generator 27 side, and the tone color program designation code is a command that designates the tone color program used by the channel,
The pitch designation code is a command for designating the pitch (note) of a musical tone generated by the musical tone generator 27.

The above parameter data is set through the parameter setting / display unit 9 which is an input / output device. So the second
The configuration will be described in detail with reference to the drawings. FIG. 2 shows the operation panel surface 9 on the front surface of the signal conversion device and the input / output terminal panel surface 8 on the back surface. The operation panel surface 9 corresponds to the parameter setting / display unit 9 in FIG.
An envelope extraction circuit 13, an A / D converter 14, and a microcomputer 20 are incorporated inside. On the other hand, on the input / output terminal panel surface 8, an input terminal 1 (1-1 to 1-8) for receiving an input signal from each drum pad 10 and a musical tone generating device.
An output terminal 6 for outputting a control signal to 27 is provided.

Reference numeral 2 denotes a volume group for sensitivity adjustment. For example, by operating the first volume, line 1 or input terminal 1
The resistance value of the feedback resistor VR of the envelope extraction circuit 13 associated with -1 is adjusted. This makes line 1,
That is, the sensitivity to the input signal from the first analog trigger signal generator is adjusted.

3, 4 and 5 are switch groups for various settings and selections.
An LED is arranged above each switch, and the lighting state of this LED indicates that the function of the switch is operating. On the other hand, a display device 7 constitutes a part of the parameter setting / display unit 9, and various data is displayed on the display surface of the display device 7.

In detail, 3-1 is a mode selection switch, EDIT
Mode and PLAY mode can be switched, and EDIT mode is indicated by LED lighting. 3-2 is a channel selection switch, LED
The channel can be set when it is turned on, and the channel number can be set by operating the up / down switches 3-5 and 3-6. 3-3 is a tone color program selection switch. When pressed once, the machine is set to a tone color program selectable state and the corresponding LED lights up. Similarly, 3-4 is a note (pitch) selection switch, and the pitch can be set via the switches 3-5 and 3-6 when the LED is turned on.

Reference numeral 4 is a switch group for selecting each line (analog trigger signal generator). Since there are eight input lines here, eight line selection switches 4-2 to match it.
4-8 are provided. For example, for line 1, that is, for the input device connected to input terminal 1-1,
Switch 4-1 for setting parameter data
Press to select line 1.

Therefore, in the RAM 22 of the microcomputer 20 (first
(See the drawing), the data of the channel designation code, the tone color program designation code, and the pitch designation code are stored for each of the eight lines in such a manner that they can be individually accessed. Further, there are four areas in the microcomputer 20 in which these eight lines of data make up one set, and the system selection switch 5 (5-1 to 5-4) selects each area. That is, when the switch 5-1 is pressed, the first set of 8-line data is selected, and similarly, the switch 5-2 selects the second set, the switch 5-3 selects the third set, and the switch 5-4 selects the first set. Four
A set is selected.

Each group of data corresponds to one electronic musical instrument system. That is, one electronic musical instrument system operates when a specific set of data groups is used during performance. Therefore, this embodiment has four electronic musical instrument systems.

As can be seen from the above, the parameter data can be freely set and changed by operating the switches 3, 4, and 5.
Switch 5 selects a system, switch 4 selects a line in the system, switch 3-2,
3-3 and 3-4 respectively set the channel, program, and tone color setting modes for the same line, and switch 3-
The designation of the same channel, program and pitch is changed by 5 and 3-6.

The operation of the embodiment configured as described above will be described with reference to the flowcharts shown in FIGS. 4 and 3.

First, the processing at the time of changing the setting of the parameter data (at the time of EDIT) will be described with reference to FIG. Machine step S1
Suppose you are in EDIT mode as shown in. At this time, the microcomputer 20 turns off the EDIT key 3-1 in step S2.
It is determined whether the PLAY mode or the EDIT mode is requested. If it is detected to be OFF, move to PLAY mode PI. If not OFF, step S
At 3 the state of the system selection switch 5 is checked to determine which system is selected. Next, in step S4, the state of the line selection switch 4 is checked to determine which line is selected. Next, in step S5, the state of the channel selection switch 3-2 is checked to determine whether or not the channel is selected. If the channel is not selected, the flow advances to step S6 to check the state of the tone color program selection switch 3-3 to determine whether or not the program is selected. If no program is selected, the process proceeds to step S7 to check the state of the pitch (note) selection switch 3-4 to determine whether or not the pitch is selected. If the pitch is not selected, the process returns to step S2.

When the channel is selected in step S5, the process proceeds to step S8, the channel data assigned to the system line determined in steps S3 and S4 is fetched from the RAM 22, and the display device 7 displays the current channel data. Next, in step S9, the states of the VALUE keys 3-5 and 3-6 are checked, and they are waited for being pressed. If pressed, step
In step S10, the ALU 25 updates the channel data, writes the update result in the RAM 22, and causes the display device 7 to display the result. After this processing is completed, the process returns to step S2.

When it is determined that the program is selected in step S6, the processes of steps S11, S12, and S13 are executed. Step S11 is the same process as step S8, step S12 is the same process as step S9, and the difference is that it is performed not for the channel data but for the tone color program designation data. In step S13 after step S12, the updated tone color program data is stored in the RAM 22 and displayed on the display device 7.
In addition to the processing of displaying to, the output processing to the analysis is also executed so that the user can hear the change of the parameter data. That is, the microcomputer 20 prepares the parameter data set in the line relating to the change together with the key-on command, and the musical tone generating device as the musical tone control signal.
Output to 27. In response to this, the musical sound generating device 27 operates the designated channel, executes the designated tone color program, and outputs the musical tone signal in accordance with the designated pitch data. As a result, via the speaker 28 (updated),
The specified tone color and tone pitch are output. Step S1
After the processing of step 2 is completed, the processing returns to step S2.

If it is decided that the pitch (note) is selected in step S7,
The processing of steps S14, S15 and S16 is executed. Step S
Step 14 corresponds to step S8, step S15 corresponds to step S9, and step S16 corresponds to step S10. The only difference is that it is done for pitch data, not channel data.

Next, the processing during PLAY, that is, during performance will be described with reference to FIG. First, the machine PLAY as shown in step P1.
Suppose you are in mode. In step P2, the state of the EDIT key 3-1 is checked to determine whether the EDIT mode is requested. If the EDIT mode is requested, the process moves to the EDIT mode as shown in step P1. If not, the PLAY mode continues and the input data is analyzed in step P3. The flow chart of FIG. 3 is shown in a very simplified manner. Actually, here, the microcomputer 20 gives the A / D conversion instruction in time division to the A / D converter 14 described above, and According to the conversion end signal from the D converter 14, the input data of the selected line is fetched and the level of this is analyzed. From the analysis result of the input data about a certain line,
If it is found that "the input data has exceeded a certain trigger level" and "the peak value of the input data is detected", the process proceeds to step P4, where a key-on command from RAM 22 Can be considered to occur on the condition that the detection occurs in the condition), the volume level designation code (which is determined from the detection peak value of the input data), and the setting parameter data, that is, the channel, assigned to the selection line of the system used. The designated code, tone color program designated code, and pitch (note) designated code are taken out, a tone control signal is generated in a predetermined format suitable for the tone generator 27, and output to the tone generator 27. As a result, the tone generator 27
Generates a musical tone according to the musical tone control signal sent from the microcomputer 20, outputs the musical tone to the speaker 28, and emits the musical tone with a specified tone color and pitch. While the input data does not reach the trigger level, the process returns to step P2, the mode is checked, and the above operation is repeated for the next line. Although not specified in Fig. 3, step P3
In the input data analysis processing in (1), when it is detected that the input data has dropped below a certain level after the key-on command, the key-off command is given to the musical sound generating device 27 to silence the musical sound.

[Modifications] The present invention is not limited to the above embodiments, and various modifications and changes can be made within the scope of the present invention. For example, when any one of the system selection switches 5-1 to 5-4 is pressed, all the setting data corresponding thereto, that is, the setting parameter data of the lines 1 to 8 is attached to the key-on command, and the musical tone generating device 27 Output to the speaker
Demonstrations may be conducted via 28. As a result, the user can hear through the ears what kind of musical sound is assigned to the lines 1 to 8, that is, to the respective drum pads 10. Alternatively or in combination with this, all the setting data (system data) may be cyclically or collectively displayed on the display device 7 in response to the operation of a specific system selection switch.

Further, in the above embodiment, the touch-sensitive volume designation is performed by the peak value detection by the input data analysis. However, this process may be omitted if desired. Similarly, a key-off command can be skipped.

[Effects of the Invention] As described in detail above, the present invention is of a type different from the tone parameter having a value corresponding to the maximum value of the impact detection signal obtained by impacting the impacted member, and this tone parameter. Since the tone generation is instructed based on a tone parameter whose value can be set externally, pitch information, tone color information and the like can be freely set and changed. Therefore, the user can freely and easily construct an electronic musical instrument system according to the music or matted to his / her own preference.

[Brief description of drawings]

FIG. 1 is a block diagram of the entire electronic musical instrument using a signal conversion device as an embodiment of the present invention, FIG. 2 is a diagram showing an operation panel and a terminal panel of the signal conversion device of FIG. 1, and FIG. FIG. 4 is a flow chart at the time of editing, FIG. 4 is a flow chart at the time of playing, FIG. 5 is a diagram showing a configuration example of the conventional apparatus, and FIG. 6 is a waveform diagram for explaining the operation of the conventional apparatus. 2-2 …… Channel selection switch, 3-1 …… EDIT / P
LAY mode changeover switch, 3-3 ... tone color selection switch, 3-4 ... pitch selection switch, 3-5, 3-6 ...
Setting data change switch, 4-1 to 4-8 ... Input line selection switch, 5-1 ... First system selection switch, 5-2 ... Second system selection switch, 5-3 ...
Third system selection switch, 5-4 ... Fourth system selection switch, 7 ... Display device, 9 ... Parameter setting /
Display, 20 ... Microcomputer.

Claims (6)

[Claims] 1. A striking member to be striking operated, and a striking signal which is provided on the striking member and outputs in real time a striking detection signal corresponding to the striking state each time the striking member is hit. Detection means, A / D conversion means for converting the hit detection signal from the hit signal detection means into a digital hit detection signal, each time the hit member is hit, in response to it,
An output value detecting means for detecting whether or not the output value of the digital batting detection signal output from the A / D converting means is equal to or more than a preset set value, and the digital batting by the output value detecting means From the time when it is detected that the output value of the detection signal is equal to or more than the set value, a predetermined number of the digital batting detection signals are saved and the maximum output value among the saved output values of the digital batting detection signals is set. The maximum output value detecting means for detecting, the parameter output means for outputting a tone parameter having a value corresponding to the maximum value detected by the maximum output value detecting means, and the tone parameter output from the parameter outputting means Setting means for setting and outputting different types of parameter values, and the musical tone parameter output from the parameter output means and the setting means. A signal conversion device for an electronic musical instrument, comprising: a control unit for instructing the generation of a musical tone having a musical tone characteristic according to the value of a meter. 2. The signal conversion device for an electronic musical instrument according to claim 1, wherein the parameter data output from the parameter output means is a volume designation code, and the parameter data set by the setting means is a sound. A signal conversion device for an electronic musical instrument, characterized by being a high designation code and a tone color designation code. 3. A signal conversion device for an electronic musical instrument according to claim 1 or 2, wherein said setting means stores manual selection input means for manually selecting parameter data and selected parameter data. A signal conversion device for an electronic musical instrument, comprising: 4. The electronic musical instrument signal converter according to claim 3, wherein the setting means has a display means for displaying the parameter data selected by the manual selection input means. Signal converter for musical instruments. 5. The signal conversion device for an electronic musical instrument according to claim 3, wherein the setting means, when the parameter data is selected by the manual selection input means, sets the tone control information including the parameter data. A signal conversion device for an electronic musical instrument, comprising output control means for outputting to the control means. 6. A signal conversion device for an electronic musical instrument according to claim 3, wherein the setting means selects and retrieves one of a plurality of parameter data stored in the storage means. A signal conversion device for an electronic musical instrument, comprising: