JPS6237792B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electronic musical instrument in which performance information is written in binary information from a medium, the binary information is read by a predetermined reader, and automatic performance is performed in accordance with the read performance information. Regarding.

In connection with the electronic musical instrument of the present invention, the patent applicant has filed a patent application for a binary information reproducing device and its recording medium (Japanese Patent Application No. 83583, 1983), and a patent application for a musical score (Japanese Patent Application No. 1983-83583). 83582) and a patent application for an automatic accompaniment device (Japanese Patent Application No. 1983-9410).

In general, a musical score for playing an electronic musical instrument, such as an electronic organ, is as shown in FIG. That is, the musical score shown in FIG. 1 shows a melody score to be played with the right hand and chord names to be played with the left hand. For example, in the case of an electronic organ, the performer refers to the musical score shown in this way and sequentially operates keys of corresponding pitches with his right and left hands to perform.

However, in most cases, the right-handed and left-handed performances are performed using different rhythm patterns, making the performance extremely difficult for beginners. Therefore, in the case of electronic organs, various methods have been considered for automatically or semi-automatically outputting accompaniment sounds, and some of these methods have been put into practical use.

However, methods of setting musical sound information such as accompaniment tones using tapes or cards, for example, have the disadvantage that the amount of information that can be set is limited because the medium is expensive and the storage capacity is generally small. Since these media are separate from the music scores that the person visually recognizes and performs, there are various inconveniences, such as the need to search for these media when performing.

Further, in order to reduce the cost of media, an example in which optically read code information, such as a bar code, is written on a musical score is also shown in Japanese Utility Model Publication No. 54-43784.

However, in this prior art, each chord is simply expressed as a barcode, so the number of bars is large, and reading a large number of bars requires a long time. There is also a problem in that there is a high possibility of erroneous recognition during reading.

This invention has been made in view of the above points. Predetermined calculation information is compressed and recorded on a medium as binary information, and after reading the binary information from this medium, it is converted into original performance information. An object of the present invention is to provide an electronic musical instrument having an automatic performance function for playback.

That is, in the present invention, a conversion table is formed from code data indicating performance sounds appearing in the music piece in a code table area recorded on a recording medium, and this conversion table includes a table for referencing the code data. The relationship between a series of symbol data representing the performance progress of the music piece on the reference area and the chord data is described in multiple sets of symbol data and chord data in a corresponding manner, and this conversion table is used to create a chord table. The conversion means converts a series of symbol data on the area to obtain corresponding code data, and the automatic performance means performs automatic performance based on the performance progress information of the music piece obtained in this way. It is characterized by

An embodiment of the present invention will be described in detail below with reference to the drawings.

Figure 2 is a diagram showing the external appearance of an electronic organ. In the figure, 1 is the organ main body, and on this main body 1 are keyboards 2,
Print on musical scores by operating the setting switch 3, power switch 4, and barcode reader (hand scanner) 9 to set the tone of the musical tone (determined by the waveform, envelope, filter characteristics, etc.) and various rhythms. A changeover switch 5, a volume switch 6, a speaker 7, and the like are provided for switching whether or not to read the barcode. Further, the main body 1 is connected to a barcode reader 9 via a cord 8.

The circuit configuration of this electronic organ is as shown in FIG. That is, the barcode shown on the musical score 10 is read by a barcode reader 9, converted into a digital signal by an amplifier circuit 11, and then sent to a control circuit (for example, a conventionally known microprocessor). The setter includes an arithmetic circuit for performing various arithmetic processes, a memory circuit for storing various data and conversion tables, etc.) 12. The control circuit 12 provides an accompaniment sound output command to the accompaniment sound source circuit 13 from the time the start command is supplied, based on information read by scanning the barcode reader 9. The start command is supplied at the timing when the rhythm start switch of the setting switches 3 is operated, or at the timing when the key is operated after the synchro start switch among the setting switches 3 is operated and set. .

Then, the accompaniment sound source circuit 13 sequentially outputs, for example, chord tones, rhythm tones, and bass tones in a predetermined rhythm pattern based on the accompaniment output command given.
This output is then output to the main sound source circuit 1, which selectively outputs musical tones based on keyboard input and switch input (given from keyboard 2 and setting switch 3).
The output signal is supplied to the mixer 15 together with the musical tone output of No. 4, and after being mixed by the mixer 15, it is output via an amplifier and a speaker (not shown).

Therefore, the barcode reader 9 and the amplifier circuit 1
The details of 1 are as shown in FIG. That is,
At the tip of the barcode reader 9, there is a light emitting device that converts the difference in light reflectance into an electrical signal (the magnitude of current).
It has a photoreflector 16 which is a light receiving element.
This output is then amplified by an operational amplifier 17 and then supplied to a differentiating circuit 18. Then, the differentiated signal in the differentiating circuit 18 is supplied to an operational amplifier 19, which is a bistable circuit, and becomes a logic signal.

When the barcode reader 9 thus configured scans, for example, an FM coded barcode (FIG. 5a) as shown in FIG. 5, the output of the operational amplifier 19 becomes as shown in FIG. 5B. In this case, the number of times the "High" level and "Low" level are inverted in one bit period corresponds to the logical values "1" and "0". When manually operating the barcode reader 9, there is of course no problem if scanning is performed at a constant speed, but even when scanning is performed at an arbitrary speed, the 1-bit time length is variable under the control of the control circuit 12, and the immediately preceding scan is performed. If the bit time length is adopted as the bit time length, misrecognition can be prevented.

Next, a musical score applicable to the electronic organ configured as described above will be explained. Now, a musical score having a barcode corresponding to the musical score shown in FIG. 1 will be explained.

That is, the chord progression of the musical score shown in FIG. 1 is as follows.

Em, Am, B ₇ , Em, Em, Em, Am, B ₇ ,
Em, Em, G, Em, G, Em, Bm, Am, Am,
_B7 , _B7 , Em, Am, _B7 , Em, Em.

Therefore, this code is now converted into the data shown in FIG. 6A and B. For example, in the above chord progression, the first chord "Em" has a "minor" chord type and the root note is "E", so the corresponding chord is "00010100", and the next chord "Am" Similarly, is "00011001".

By the way, there are five types of chords that appear in this musical score: "Em", "Am", "B ₇ ", "G", and "Bm" as mentioned above. Numbers 0-4, i.e. "0, 0, 0, 0" ~
If these registered code numbers 0 to 4 are associated with "0, 1, 0, 0" and used as symbol codes to indicate the code table, the chord progression will be as follows.

0, 1, 2, 0, 0, 0, 1, 2, 0, 0,
30, 3, 0, 4, 1, 1, 2, 2, 0, 1, 2,
0, 0.

FIG. 9 shows the chord progression converted into binary information as described above. That is, these three lines of data correspond to three lines of the barcode. And the ninth
In the figure, areas 1, 12, and 28 each indicate the start mark of a row (see FIG. 8). Further, 2 is an area for specifying the type of rhythm, and in this case, code ``0101'' specifying slow rock is set. Note that a table showing the relationship between rhythm types and chords is omitted. Areas 3 to 7 are code table areas where code data that will be converted data in a conversion table that will be formed later is recorded, and the order in which they are arranged means the relationship with symbol data. Therefore, in the conversion table, multiple sets of code data and symbol data are written in correspondence with each other, and as mentioned above, in the area of this code table, "Em", "Em",
Codes corresponding to "Am", "B ₇ ", "G", and "Bm" are set.

Area 8, as shown in FIG. 6C, designates a separator that separates the chord table area from the table reference area for storing actual chord progressions. Then, in areas 9 and 10 following this area 8, a control code 1 and a numerical value "16" shown in FIG. 8 are set. This control code 1 indicates that each step code added by 1 to the number indicated by the next 4-bit data corresponds to one measure, and in this case, the next 16 codes Specifies that the names are each one measure long. Note that this chord name basically specifies the length of 1/2 measure with one chord name.

Then, the next area 11 and the second row area 2
7 specifies a line end mark as shown in FIG.

Furthermore, data corresponding to the chord progression is set in area 13 on the second line to area 39 on the third line. That is, "0" is set in area 13 to indicate the chord "Em", followed by "Am",
“B ₇ ”, “Em”, etc. are set. Furthermore, area 1
Control code 2 (see Figure 8) is stored in area 7, which instructs that the previous registered chord be repeated two more times (see Fig. 8), indicating that the chord "Em" set in area 16 will continue for two more measures. show. Also,
Areas 30 and 31 in the third row are areas 9 and 1 above.
Similar to 0, specifies that the next eight chord names are each one bar long.

Area 40 is a mark indicating the end of the chord progression as shown in FIG. 8, and area 41 is a mark indicating the end of data. Furthermore, area 42 following this area 41 is a parity check area, and 16
Consists of bit data.

The binary code information obtained in the above manner is
With FM coding as shown in Figure 5, the first
This is the barcode shown in the lower column 10a of the musical score 10 in Figure 0. Note that each line in FIG. 9 completely matches each line in FIG. 10. And furthermore, this sheet music 10
In the upper column 10b, a musical score similar to that in FIG. 1 is shown.

Next, the operation of this embodiment configured as above will be explained. That is, in the electronic organ of this embodiment, when automatic accompaniment is to be performed when playing the music indicated on the musical score 10, the changeover switch 5 is
After turning on the barcode reader 9 to enable operation, the barcode reader 9 scans the lower column 10a of the musical score 10. When this operation is sequentially executed for each row in the lower column 10a and the corresponding data is correctly stored in the control circuit 12, the control circuit 12 enters a standby state in preparation for the next input start command.

That is, the control circuit 12 detects the separator mark in area 8, separates the chord table area from the table reference area, and converts the data in each area of the table reference area into code data specifying each chord according to the conversion table. Convert.

For example, after the performer plays the melody of the first measure, when the rhythm start switch is operated to start the melody, the control circuit 1
2, first, the accompaniment sound source circuit 13 is instructed to play the chord "Em" specified in area 13 of FIG. 9 at the rhythm specified in area 2, that is, the slow rock rhythm. Therefore, the accompaniment sound source circuit 13 creates chord tones, rhythm tones, and bass tones according to the slow-lock rhythm pattern, and supplies them to the mixer 15. At the same time, the main sound source circuit 14 generates and outputs melody sounds in response to the player's playing of the keyboard 2, and provides them to the mixer 15. Therefore, the mixer 15 mixes the musical tones from the accompaniment sound source circuit 13 and the main sound source circuit 14, and outputs the mixed tones through the amplifier and the speaker.

Similarly, the accompaniment sound source circuit 13 sequentially outputs chord tones, rhythm tones, and bass tones of "Am", "B ₇ ", "Em", etc., and mixes them with melody tones corresponding to key operations. A sound is emitted.

When the automatic accompaniment of the last bar of the musical score 10 is finished, the control circuit 12 enters a standby state and stops outputting musical tones.

In the above embodiment, automatic accompaniment is performed based on the type of rhythm and chord progression information based on the accompaniment information.
However, in addition to this, timbre information of a musical tone to be output (ie, musical tone waveform information, envelope information, filter characteristic information, etc.) or effect information may be stored as various types of musical tone information. That is, in electronic organs, musical synthesizers, etc., there are so many operation switches that it is almost impossible to immediately specify a desired tone or effect. By printing this as a barcode on the musical score, it becomes possible to immediately set the musical tone.

Furthermore, in the above embodiment, chord data corresponding to the chord progression was printed on the musical score, but barcodes corresponding to the pitch and length of the notes were printed in sequence and outputted at the same time as the musical tones produced by manual operation of the keyboard 2. Also good.

In addition, although the above barcode was based on FM coding, it is also possible to use various methods such as RZ, NRZ, NRZI, PE, MFM, etc., and the form of the barcode is not limited to the above examples. .

Further, in the above embodiment, the barcode reader 9 is fixedly connected to the organ main body 1 via the cord 8, but it can also be detachably attached to the organ main body 1, for example, by a pin jack method. , in that case, barcode reader 9
It is only necessary to attach it to the main body 1 when using the electronic musical instrument, which is very effective for playing or storing the electronic musical instrument.

In addition, without departing from the gist of the present invention,
Of course, various modifications and applications are possible.

As described in detail above, this invention describes binary information, which is performance information of a music piece, in a compressed expression format on a medium using a data format that includes a code table area, a table reference area, and a separate area. The converting means converts and reproduces the code data in the code table area using the conversion table formed after reading the binary information, so as to convert the symbol data in the table reference area into the code data in the code table area. Since the automatic performance means performs automatic performance based on the performance progress information of the music piece obtained in this way, automatic performance can be performed easily and the amount of binary information recorded on the medium can be reduced. , the recording capacity can be reduced, reading can be performed in a short time, and erroneous recognition during reading can be improved, which are excellent effects.

[Brief explanation of the drawing]

FIG. 1 shows a conventional musical score, FIGS. 2 to 10 show an embodiment of the present invention, and FIG.
An external perspective view of an electronic organ equipped with a barcode reader, Fig. 3 is a block circuit diagram of this electronic organ, Fig. 4 is a detailed view of the main part of Fig. 3, and Fig. 5 is a barcode and corresponding logic values. Diagram showing the relationship between
Figures 8 through 8 are diagrams showing various chords, Figure 9 is a diagram showing musical tone information of a piece of music based on the chords shown in Figures 6 through 8, and Figure 10 is a diagram showing the musical score of this example. FIG. 2...keyboard, 3...setting switch, 5...changeover switch, 9...barcode reader, 10...music score, 10a...bottom column, 10b...upper column, 11...
Amplifier circuit, 12... Control circuit, 13...
Accompaniment sound source circuit, 16...Photoreflector, 1
7, 19... operational amplifier, 18... differential circuit.

Claims (1)

[Claims] 1. Reading the performance information from a medium in which the performance information is written as binary information using a predetermined reader,
In an electronic musical instrument that performs automatic performance based on the performance information read by the automatic performance means, the medium contains performance information that determines the performance sound to be automatically performed as the performance information in binary information. In the area where this binary information is written, multiple pieces of information indicating the performance sounds that appear in the song are written in a predetermined order as code data, and after being read by the reader, it is converted. A chord table area that is converted into data and information representing the performance progress of the song are written as a series of symbol data, and this series of symbol data is read by the reader and then formed into a conversion table. A table reference area that determines the performance progress of the song by referring to the code data that is the converted data described in , and separate data that separates the code table area and the table reference area are described. The electronic musical instrument main body detects the separate data from the information read from the medium by the reader, and reads the plurality of code data in the code table area and the table reference. a discrimination means for discriminating between a series of symbol data of an area; and a conversion table in which a plurality of sets of the symbol data and the code data are described in a corresponding manner based on the discrimination result of the discrimination means, and the contents of this conversion table are formed. converting means for converting each of the series of symbol data read from the table reference area into code data written in the code table conversion area based on the above, and obtaining performance progress information of the music piece; An electronic musical instrument, characterized in that the automatic performance means performs automatic performance based on the conversion output of the conversion means. 2. Claim 1, wherein the binary information is written on the medium using barcode information, and the reader is a barcode reader.
Electronic musical instruments listed in section. 3. The electronic musical instrument according to claim 2, wherein the barcode reader is a manually operable hand scanner. 4. The electronic musical instrument according to claim 2 or 3, wherein the barcode reader is detachably connected to the electronic musical instrument main body via a connection line.