JPH03204690A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To enable a player to easily play a part by providing an operation element and providing a means which mutes some part of performance data when this operation element is in an ON state. CONSTITUTION:This electronic musical instrument consists of a CPU 1, a keyboard 2, a header memory 3, a song memory 4, a parameter memory 5, a working memory 6, an operation switch 7, a tempo clock generator 8, a tone generator 9, a sound system 10, a bus 11, and a program memory 12. The operation switch 7 has a song select switch 7a, a demonstration switch 7b, and a stop switch 7c. When the demonstration switch 7b is turned on, music is played from the head song in order and when the song select switch 7a is turned on to specify a music number, specified music is played. Further, when the demonstration switch 7b is turned on during the play of the specified music, the main melody is muted. Consequently, part play by the player is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Al Industrial Field of Application) The present invention relates to an electronic musical instrument that stores automatic performance music such as demonstration performance music (hereinafter referred to as "demonstration music").

(b) Conventional Technology Some electronic musical instruments have demo songs stored in advance. Furthermore, electronic musical instruments that can be automatically played by inserting a memory card or the like in which songs are stored have also been put into practical use.

Furthermore, some players of electronic musical instruments want to have only the accompaniment played automatically and want to play the melody themselves.

(C) Problem to be solved by the invention Conventionally, it was not possible to mute only some parts of a demo song that had already been recorded. I couldn't get it to play.

In view of these conventional problems, this invention facilitates the user's part performance by providing a function to select and mute only some parts from automatic performance data that includes demonstration performances, etc. An object of the present invention is to provide an electronic musical instrument with an automatic performance function that stores performance data including a plurality of parts internally in advance and plays them in parallel according to an operation. The electronic musical instrument is characterized in that it is provided with an operator and means for muting the reproduction of only a part of the parts when the operator is turned on.

te1 Effect of the Invention The electronic musical instrument of the present invention stores an automatically performed piece (such as a demo piece) consisting of a plurality of parts. This automatically played music is played back (played) by the user's operations, but when a specific operator is operated, only some of the parts are not played back (the sound is muted). This allows only some parts of the main melody, sub-melody, accompaniment, rhythm, etc. to be sounded, and based on this, the user can play the parts that are not being sounded, making it easier to enjoy music. Become.

if) Embodiment FIG. 1 is a block diagram of an electronic keyboard instrument which is an embodiment of the present invention. This electronic musical instrument has 15
It is possible to play the demo songs, and when you turn on the demonstration switch 7b (described later), the 15th song will be played sequentially starting from the first song.
When a song is played and the song select switch 7a is turned on to designate a song number (specified using the black key), one of the designated songs is played. Furthermore, when the demonstration switch 7b is turned on while the specified music is being played, the main melody is muted.

In this electronic keyboard instrument, a program memory 12 and a CPU are connected via a bus 11.

The CPUI executes instructions according to a program shown in a flowchart, which will be described later, stored in the program memory 12. Bus II also has keyboard 2 header memory 3. Song memory 4. Parameter memory 5. working memory 6
, an operation switch 7, a tempo clock generator 8, and a tone generator 9 are connected to each other, and a bus 11
Sends and receives data, etc. to and from the CPU via. Header memory 3. The song memory 4 stores data necessary for automatic performance, which will be described later, and the parameter memory 5 stores various data for determining tone colors, etc., and is composed of a ROM. The working memory 6 is composed of a RAM, and stores various data generated during performance, and also sets a group of registers to be described later. The operation switch includes a song select switch 7a, a demonstration switch 7b and a stop switch 7c. The tempo clock generator 8 is connected to the interrupt terminal of the CPU, generates a clock signal corresponding to the tempo of the performance during automatic performance, and interrupts the CPU 1 at time intervals of 16th note length. Tone generator 9
has a plurality of sound generation channels, and forms musical tones based on sound generation instruction data sent from the CPUI.

This musical tone is amplified by the sound system 10.

pronounced.

FIG. 2 is a diagram showing the structure of data regarding demonstration songs stored in the memory.

(A) of the same figure is a demo song table. The 15 demo songs are numbered O to 14, and these songs can be played back (played) by operating the demonstration switch 7b or song select switch 7a as described above.
can do.

To specify the demo song using the song select switch 7a, press C.
Black keys 1# to A3# are used, and song numbers 0 to 14 are assigned in order from the lowest key.

In this demo song table, song numbers and black key codes are stored in correspondence.

FIG. 2B shows a schematic structure of the header memory 3 and song memory 4. Header memo υ3 stores five pieces of heading data for each demo song. The contents of each heading data are: (song number) x 5: Start address of main melody song data (song number) x 5 + 1: Start address of sub-melody song data (song number) Number) X 5 + 37 song tempo value data (song number)
5+4: Rhythm style data of the song (8 beat, waltz, etc.). Song memory 4 contains performance data for 15 songs, 1
Each song is memorized in the order of main melody, sub melody, and accompaniment. The first bit of the area where the main melody is stored is the beat flag BFL. If this flag is in cent, the song is in four time signature, and if it is in cent, it is in triple time. The performance data for each part is control data for each section when the time for automatic performance is divided into 16th note lengths.

FIG. 3 is a diagram showing the configuration of registers set in the working memory 6.

MOD is a mode register. This mode register takes four values from 0 to 3, and when it is 0, it is normal mode.
1 indicates demo mode, 2 indicates song mode, and 3 indicates minus one (-1) mode. Normal mode is a mode in which it operates as a normal electronic keyboard instrument without automatic performance, and demo mode is a mode in which 15 demo songs are automatically played sequentially from the beginning. is a mode in which only the demo song specified by the song select switch 7a and the black key is played. Furthermore, the minus one mode is a mode in which the main melody is muted when a demo song specified in the song mode is played.

5ONG is a song number register. This register stores the song number currently being played or the designated song number.

END is an end track number register. As mentioned above, three tracks of the demo song are played in parallel.
This demo song ends when all tracks have finished playing. That is, after the main melody ends, there are cases where the song ends after there is a secondary melody or accompaniment. For this reason, this register counts the number of tracks for which reading of the song has been completed, and in the case of the demo mode, when the count value reaches 3, it is determined that the song has ended since the song data of all trunks has ended.

In the case of minus one mode, when the count value reaches 2, it is determined that the song data of the sub-melody/accompaniment trunk has ended, so P(11(i=o~
2) is a song data pointer. This song data pointer is provided for each track from the 0th track to the 2nd trunk, and stores the read address of each track of the song stored in the 5ONG register.

BEET is a time signature register. This register stores the time signature of the demo piece being played or selected at that time.

TMP is a tempo register. This register stores the tempo value of the song specified at that time. The tempo data is included in the heading data as described above.

5TYL is a style number register. This register stores the rhythm style of the song specified at that time (8-beat waltz, etc.).

The rhythm style is stored in the header memory 3 as described above.

FIG. 4 is a flowchart showing the operation of a program controlled by the CPUI.

FIG. 5A shows the main processing operation. When this device is powered on, it first performs an initial operation (clearing registers, etc.) (nl) to put this electronic keyboard instrument into a playable state. Next, the MOD register is determined, and if it is other than 1 (demo mode), a key processing operation (n3) is executed. That is, in the demo mode, there is no response to the keyboard performance. Next, it is determined whether there is an on event of the operation switch 7 (n4), and if there is an on event, the operator processing operation (n5) is executed. Further, other processing such as sound generation level control is executed (n6), and the process returns to n2. While this electronic keyboard instrument is powered on, n2~n
Repeat step 6.

FIG. 4(B) shows the operator processing operation. First n10~n
12, song select switch 7a, demo switch 7b
, it is determined which operator among the stop switches 7C has been operated. When the stop switch 7C is operated, the process proceeds from nlo to n14, and when the demonstration switch 7b is operated, the process proceeds from nil to n17.
When the song select switch 7a is operated, n1
2 → Proceed to n26. If any other operator is operated, other operator processing (n13) is executed and the process returns.

When the stop switch 7c is operated and the operation proceeds to n14, it is determined whether the MOD register is O or not. If it is other than 0, mute all channels to stop the automatic performance operation that is running at that time.n 15), M
Set 0 to the OD register (n16) and return.

When the demo switch 7b is operated and the operation proceeds to n17, the content of the MOD register at that time is determined (n
17). If the MOD register is 0, the operation of this demo switch 7b sets the demo mode, so the MOD
Add 1 cent to the register. Furthermore, in order to play all the demo songs in order from the beginning, 0 is placed in the song number register 5ONG, 0 is placed in the end track number register END (n18), and then header processing (same as above) is performed to start playing the songs. Execute Figure (C)) (n19), add 1 to 5ONG (n20) and return.

If the MOD register is 1 at n17, the operation of this demo switch 7b cancels the demo mode. Set the MOD register to 0 (n21), mute all channels (n22), and return.

If the MOD register is 2 in n17, this is a designation to shift from the song mode (a mode in which a specified song is automatically played) to the minus one mode (a mode in which only the main melody is muted and automatically played). Set 3 indicating minus one mode in the MOD register (n23), send data to the tone generator to mute channel O (n24), and return. Also, the MOD register is 3
If so, it is a return from minus one mode to song mode. Insert 2 indicating the song mode into the MOD register (n 25) and return. 2 in the MOD register
When is set, sound generation is resumed from the next musical tone in the automatic performance operation ((E) in the same figure).

Also, the song select switch 7a is operated and the operation is n2.
When proceeding to step 6, the MOD register is first determined. M
If OD=1, since a demo performance is in progress, the operation of this song select switch is ignored and the process returns. If the contents of the MOD register are other than 1, it is determined whether or not the black keys C1# to A3# are turned on at the same time as the song select switch 7a is operated (n27); if not, the process returns directly. If it is on, read the song number indicated by that black key from the demo song table and play 5O.
Set in the NG register (n28).

To play this demo song, set 2 in the MOD register, set O in the END counter, set O in C0UNT (n29), and then execute header processing (n3
0), the specified song starts after the clock value of 211) section is accumulated in the C0UNT register.

FIG. 4(C) is a flowchart showing the header processing operation. In this operation, the start address etc. stored in the header memory are read out to prepare for playing the demo song. First, the designated demo song number (SONG) is multiplied by 5 and assigned to the header pointer HP. Read the header memory using this HP as an argument, P(0), P(
11, P (21, Assign the contents to TMP and 5TYL (n32), then read 1 bit (BFL) of the address indicated by P (0) n33), and check if this bit is O or 1. (n34), if this bit is 0, this song is in 4 time signature, so set BEET to 4 (n35); if this bit is 1, this song is in 3 time signature, so set 3 to BEET. (n36), the TMP register sent by the above read operation,
The data including the contents of the 5TYL register is used in the automatic performance processing described later.

FIG. 4(D) is a flowchart showing the tempo clock interrupt operation. Since this operation differs depending on the content of the MOD register, the content of the MOD flag is first determined at n40. In normal mode, there is no content to be processed, so if MOD=0, the process returns directly. If MOD=1 (demo mode), execute the automatic performance operation (n41), return if the END register contents are not 3 (n42), and start the next song if the END register contents are 3. In order to perform automatic performance, header processing for the next song should be executed (43), 1 is added to 5ONG, and 0 is substituted when 5ONG=14. 0 for END
Set (n44) and return.

If MOD=2 (song mode) at n40, it is determined whether the COUNT counter is counting two measures (n45).

If it is not counted, add 1 to C0UNT (n
49) Return. If C0UNT has already counted two measures, an automatic performance operation is executed at n46. If the contents of the END register are not 3 (n47), the process returns as is; if the contents of the END register are 3, 0 is placed in the MOD register and the process returns (n48).

Even when MOD=3 (minus one mode) in n40, it is determined whether the CUNT counter is counting two measures in the same way as in song mode (n5
0), if it is not counted, add I to C0UNT (n49) and return. If C0UNT has already counted two measures, the automatic performance operation should be executed.n51
), if the contents of the END register are not 2 (two tracks except the main melody have ended) (n52), return as is; if the contents of the END register are 2, set 0 to the MOD register and return (n53). Figure 4 (E)
is a flowchart showing automatic performance operation. In this operation, the song data of each track in the song memory (FIG. 2(B)) is read out and sent to the sound source for automatic performance. First, set O to pointer i (n 55), P
If the data indicated by (i) is FF, the performance of this trunk has ended, and the process advances to n62. If the data pointed to by P(i) in n56 is not FF, it is automatically executed using that data except for the 0 track in minus one mode (MOD=3) and the register TMP-5TYL representing tempo and accompaniment style information. Performance processing is performed (n56), and this operation is skipped only when MOD=3 and i=0. Step P (J) (n59
), if the specified data as a result of increment is an END code, P (set FF to it, add 1 to the END register (n61), and proceed to n62. If it is not an end code, proceed from n60 to n62. At n62, 1 is added to i.When i=3, processing for all tracks has been completed, so the process returns based on the judgment at n63.If i≦2, execute operations from n56 onwards for the track specified by i. do.

With the above operation, the main melody can be muted or sounded again by turning on the demo switch in the song mode. In addition, you can select a song by pressing any black key while holding down the song select switch, so you can play any song even if you have many demo songs stored. Furthermore, if the title of the song specified by the black key is printed on the information panel of the keyboard, the performer can be easily notified of this. Although the keys for specifying the demo songs are black keys in this embodiment, they may also be white keys. Furthermore, although the demo performance is set to start from song number 0 each time the demo switch is turned on, it may also be started from the song following the last played song. Fourth
This operation can be realized if the 5ONG register is not cleared at 018 in Figure (B).

In addition, in the example, the song memory contains 16 times when playing automatically.
The method used was to store control data for each minute mark length section and process the data successively for each clock interrupt, but other methods may also be used. For example, an event method (a method in which the measure number and position within the measure in which a key event or timbre event is located is stored together with the event type and timbre type or key code, and read out only when there is an event during playback) may be used.

Tg) Effects of the Invention As described above, the electronic musical instrument of the present invention allows for muting of some parts of pre-stored automatic performance songs, making it easy for even those who are not used to playing electronic musical instruments. You can play songs with accompaniment. Also,
Since the song is stored in advance, it is known which track has what kind of data stored therein, so the part that should be muted can be easily muted, and other parts will not be muted by mistake.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a part of the working memory register of an electronic keyboard instrument according to an embodiment of the present invention, and FIGS. It is a flowchart showing the operation.

Claims (1)

[Claims] (1) In an electronic musical instrument that has an automatic performance function that stores performance data including multiple parts in advance and plays them in parallel by operation, an operator is provided, and when this operator is in the on state, the An electronic musical instrument characterized by having a means for muting some parts of performance data.