JP2003044052A - Volume controller for electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give priority for the change in a master volume by a user rather than for the setting of the master volume by song data and to maintain the volume balance set by the user. SOLUTION: A volume event control section 18 generates volume events by the changes in the value by a volume slider 36. A master volume control section 16 has a means to latch the value of the master volume by the master volume inputted from an MIDI sequencer 12 and the volume event operated by the user. When a volume event is generated by a user's operation, a flag in the section 16 is set. When a clear switch 38 is turned on, the flag is cleared. While the flag is set, latching of the master volume inputted by MIDI song data is prohibited.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a volume control device for an electronic musical instrument, and more particularly, to reproducing a music volume from music data of MIDI information, and a master volume value of the music data. The present invention relates to a volume control device for an electronic musical instrument that does not reflect the volume. 2. Description of the Related Art Generally, a master volume is set in music data of MIDI information. The set master volume adjusts the volume of the entire plurality of channels integrally. FIG. 7 is a diagram illustrating an example of music data, that is, an example of sequence data. Music data is most commonly described using SMF (Standard MIDI File) format 0. An SMF event is composed of "delta time" indicating the time until the next event execution and "contents of the event". The delta time “0” represents a simultaneous event. In FIG. 7, a master volume is set for an event i1. Event i2 has channel C
The tone colors of H1 and CH2 are set. The volume of the channels CH1 and CH2 is set for the event i3. Event i4 includes channel CH after 1/4 beat
An event is set in which C2 of No. 1 is pronounced with a keystroke strength of 100. Hereafter, the performance information until the end of the song is MIDI
Described in the information. The electronic musical instrument that has received the music data executes the processing in order from the event i1 to reproduce the music. At the time of reproducing a musical sound, an electronic musical instrument reads the value of the master volume and latches this value to determine the volume of the music. This latched value can be adjusted by the player and changed to a desired value. For example, there is a case where a keyboard is played (hand-operated) with the musical sound as a background while reproducing music data to generate a musical sound. At this time, the player can change the value of the latched master volume and adjust the volume balance between the musical sound (backing part) based on the music data and the musical sound (manual playing part) by playing as desired. . [0005] However, the volume balance set by the player may be broken in the following cases. For example, when playing a plurality of songs, if the master volume is set to the song data to be reproduced after setting the volume balance to a preference, the latched master volume value is set to this song data. It moves to the value of the master volume. Even when the song data is read from the beginning and the performance is restarted, the master volume value is initialized at the beginning of the song, so the master volume value changed by the player to the preference is set at the beginning of the repeated song data Initialized with the master volume value that has been set. Therefore, the player must change the master volume setting for each song, which is very inconvenient. [0006] The present invention solves the above-mentioned problem, and when the value of the master volume latched by the electronic musical instrument is changed by the player, the volume is not influenced by the master volume in the music data to be reproduced thereafter. It is an object of the present invention to provide a volume control device of an electronic musical instrument that can perform the control. SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems and achieving the object is based on a musical tone based on MIDI song data including a master volume value, and input from a performance operator. In a volume control device of an electronic musical instrument for generating a musical tone based on an on / off event, an input means for inputting a master volume value, a master volume value set in the MIDI song data and a master input by the input means. A latch unit for setting a volume value; controlling a volume of a musical tone based on the MIDI song data with the value set in the latch unit; Volume control means for controlling the volume of a musical tone; and a master volume value input from the input means. When the flag is set, an operator for clearing the flag, and M while the flag is set.
A means for prohibiting the setting contents of the latch means from being updated with the value of the master volume according to the IDI song data. According to the above feature, when the value of the master volume is inputted by the input means and the content of the latch means is changed, the flag is set. After this flag is set, even if MIDI song data is read, the value of the master volume described therein is not set in the latch means. That is, the change of the master volume based on the MIDI song data is prohibited. This prohibition is released using an operator that clears the flag. The present invention will be described below in detail with reference to the drawings. FIG. 5 is a plan view of the electronic musical instrument according to one embodiment of the present invention. The electronic musical instrument 1 has a keyboard (performance operator) 2 provided on the player side, that is, on the lower side of the drawing, and a panel unit 3 provided on a side distant from the player side, that is, on the upper side of the drawing. In the center of the panel unit 3, there is provided a display 31 composed of, for example, a liquid crystal display device, and left, right, and below the display 31 correspond to a plurality of display areas preset on the display 31. Are provided with operation button groups 32 and 33 for selecting or operating the information displayed in. On the left and right sides of the panel section 3, switches 34 and 35 for selecting a tone color selection switch and a style (music genre, etc.), a volume slider 36 for setting a master volume, and a total volume setting for sound generation are provided. , A clear switch 38 (the function of which will be described later), and the like. In addition, the panel unit 3 is provided with various switches, a display device including an LED element, and the like, in addition to the above. FIG. 6 is a block diagram showing a hardware configuration of a main part of the control device of the electronic musical instrument 1. Bus line 4 has C
The PU 5, RAM 6, ROM 7, input device 8, sound source 9, display 31, MIDI interface 10, keyboard 2, and MIDI sequencer (S / Q) 12 are connected. The input device 8 includes the operation button groups 32 and 33 and the switch group 3.
4, 35, and a volume slider 36. The output side of the sound source 9 is connected via an amplifier 13 to a sound system 14 including a speaker and the like. The input device 8 and the keyboard 2 connected to the bus line 4 are provided with an interface device as needed. FIG. 1 is a block diagram showing the main functions of the control device. In the present embodiment, after the player changes the value of the master volume, the volume of the master volume set in the music data, which is the MIDI information, is not reflected until the clear operation is performed. I do. The music data storage unit 15 stores the sequence data input via the MIDI interface 10, that is, the music data (M
IDI song data). The format of the music data and the contents of the data are the same as those described with reference to FIG. The music data storage unit 15 can store a plurality of music data. The MIDI sequencer 12 has, for example, a data reading and reproducing function of 16 channels, and processes music data read from the music data storage unit 15. That is, if there is a master volume event in the music data, the event is transmitted to the master volume control unit 16.
Send to On the other hand, other events included in the music data are transmitted to the sound source controller 17. The value of the volume slider 36 is read into the volume event controller 18 when the value of the volume slider 36 changes, that is, when the volume slider 36 is moved. The volume event control unit 18 creates a master volume event including the read value of the master volume slider 36 and transmits the master volume event to the master volume control unit 16. The master volume control unit 16 has a user event flag, and this user event flag is set when a master volume event is received from the volume event control unit 18. When the clear switch 38 is turned on, the clear switch event control unit 19 creates a user volume clear event and sends it to the master volume control unit 16. The master volume control unit 16 gives priority to the master volume event transmitted from the volume event control unit 18 over the master volume event of the music data, and determines the value of the master volume to be output to the sound source control unit 17. The function of the master volume control unit 16 is shown in FIG.
Will be further described later. Master volume control unit 16
The value of the master volume determined in step (1) is input to the tone generator control unit 17, and the volume of the performance part based on the music data is set by this value. The keyboard 2 has, for each key, a switch for outputting an on-event signal and an off-event signal in response to a key press and a key release, respectively. Is detected by The keyboard event control unit 20 transmits the detected ON event and OFF event to the sound source control unit 17. The sound source control unit 17 includes a MIDI sequencer 1
Event received from keyboard 2 and keyboard event controller 2
The sound source 9 is controlled for each performance part based on the event received from 0. That is, the contents of the music data (see FIG. 7) supplied from the MIDI sequencer 12 are set in the tone generator 9 for each event to form the first musical tone signal, and the event supplied from the keyboard event control unit 20 is processed. A second tone signal is formed by setting the tone generator 9 on the sound source 9. The first tone signal corresponds to the performance of the backing part, and the second tone signal corresponds to the performance of the hand-playing part.
These tone signals are set in the total volume by the dial 37 in the total volume setting section 37A, supplied to the sound system 14, and output as sound. FIG. 2 is a block diagram showing a main part of the volume control device including the MIDI sequencer 12, and the same reference numerals as those in FIG. 1 denote the same or equivalent parts. The MIDI sequencer 12 has a plurality of MIDI channels (16 channels (C
H)), and stores the events read from the music data for each channel.
,..., 12-16, and latches 12-1L, 12-2L, which store the volume (volume) of each channel.
.., 12-16L. Outputs of the latches 12-1L to 12-16L are connected to a master volume latch 121 that stores a master volume common to all channels. The master volume latch 121 is provided in the master volume control unit 16. The master volume latch 121 latches the master volume value set in the music data or the master volume value set by the player using the volume slider 36. Each memory 12-1 to 12-
16, the data read from each latch 12-
The volume ratio of each channel is determined by 1L to 12-16L, and the master volume latch 121 determines the composite volume of each channel. FIG. 3 is a block diagram showing the main functions of the master volume control unit 16. When receiving the master volume event from the volume event control unit 18, the flag control unit 21 outputs a set signal and sets the user event flag 22. On the other hand, when the flag control unit 21 receives the user volume clear event from the clear switch event control unit 19,
Clear The master volume event supplied from the MIDI sequencer 12 is transmitted to the volume change prohibition unit 23.
Is set in the master volume latch 121 via the. The volume change prohibition unit 23 prohibits the gate 23a from inputting data from the MIDI sequencer 12 to the master volume latch 121 while the user event flag 22 is set. The gate 23a is opened when the user event flag 22 is cleared, and permits data from the MIDI sequencer 12 to be input to the master volume latch 121. On the other hand, the master volume event from the volume event control unit 18 is input to the master volume latch 121 without passing through the volume change prohibition unit 23. FIG. 4 is a flowchart showing the processing of the master volume control unit 16. In FIG. 4, in step S1, the user event flag 22 is cleared (=
Initialization such as 0) is performed. In step S2, it is determined whether or not the user has changed the master volume, that is, whether or not a master volume event has been received from the volume event control unit 18. If step S1 is affirmative, the user event flag 22 is set (= 1) in step S3, and the process proceeds to step S4. If step S2 is negative, step S
Go to 5. In step S5, it is determined whether a master volume event has been received from the MIDI sequencer 12. If step S5 is positive, the process proceeds to step S6, and it is determined whether or not the user event flag 22 is set. Step S4 is negative (user event flag =
If 0), proceed to step S4. If step S5 is negative or step S6 is positive (user event flag = 1), the contents of the master volume latch 121 are not updated, so step S4 is skipped and the process proceeds to step S7. Step S7
Then, it is determined whether or not the event is a user volume clear event. If step S7 is positive, the user event flag 22 is cleared (= 0) in step S8, and the process exits the flowchart. If step S7 is negative, step S8 is skipped and the user event flag 22 is maintained. If step S2 is affirmative, step S
At 4, the data of the master volume latch 121 is updated with the data of the master volume event from the volume control unit 18. If step S6 is negative, step S6
4 transfers the data of the master volume latch 121 to MIDI.
It is updated with the master volume event data from the sequencer 12. According to the present embodiment, after the player operates the volume slider 36 to update the master volume, the updated master volume value is set to the MIDI value.
The priority is given to the master volume value of the music data input via the sequencer 12. Therefore, even when another piece of music data is newly reproduced, or when the music data returns to the beginning of the music and is repeatedly reproduced, the clear switch 38 is used.
Until is operated, the value of the master volume set by the player is maintained. That is, the balance between the volume of the performance part based on the MIDI information and the volume of the part based on the event of the keyboard 2 is maintained by the setting of the player. In the present embodiment, the system is configured so that an event based on MIDI data and a musical tone based on the event based on the keyboard 2 are synthesized and sounded. However, the present invention is not limited to this. Instead of the keyboard 2, other musical operators such as musical tones and MIDI by events such as musical pads are used.
The present invention can also be applied to the case of synthesizing a musical tone of an event by data. As is apparent from the above description, according to the present invention, when the player, that is, the user sets the master volume, the master volume value described in the MIDI song data thereafter becomes It will be ignored. Therefore, for example, when performing a hand-playing performance with a performance operator (keyboard or the like) with the MIDI song data as a back, and when the player sets the volume balance between the back playing and the hand-playing to suit the preference, The volume balance is M
It can be prevented from being broken by reading the IDI song data.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating main functions of an electronic musical instrument according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a main configuration of a volume control device including a MIDI sequencer. FIG. 3 is a block diagram illustrating a configuration of a master volume control unit. FIG. 4 is a processing flowchart of a master volume control unit. FIG. 5 is a plan view of the electronic musical instrument according to one embodiment of the present invention. FIG. 6 is a main block diagram of a control device of the electronic musical instrument. FIG. 7 is a diagram showing an example of MIDI song data. [Description of Signs] 1 ... electronic musical instrument, 2 ... keyboard, 3 ... panel section, 9 ... sound source, 12 ... MIDI sequencer, 16 ... master volume control section, 18 ... volume event control section,
19: Clear switch event control unit, 20: Keyboard event control unit, 21: Flag control unit, 22: User event flag, 23: Volume change prohibition unit, 3
6 Volume slider 37A Total volume setting section 38 Clear switch

Claims (1)

Claims 1. A volume control device for an electronic musical instrument that generates a tone based on MIDI song data including a master volume value and a tone based on an on / off event input from a performance operator. Input means for inputting a master volume value; latch means for setting a master volume value set in the MIDI song data and a master volume value input by the input means; and a value set in the latch means Volume control means for controlling the volume of a musical tone based on the MIDI song data and controlling the volume of a musical tone based on the on-event of the performance operator, and a master volume from the input means. A flag that is set when a value is input, and a control that clears the flag Means for prohibiting the setting contents of the latch means from being updated with a master volume value based on MIDI song data while the flag is set. apparatus.