JPH05265448A - Musical sound generating device - Google Patents

Abstract

PURPOSE:To provide the musical sound generating device which can increase the number of kinds of musical sound to be generated without increasing the capacity of the internal memory. CONSTITUTION:A ROM 4 for a sound source is stored with plural kinds of rhythm sound source data and a RAM 5 for the sound source is stored with waveform data on external sounds detected by a microphone 11 and waveform data supplied from an external storage device 16 through an interface device 15. The waveform data stored in the RAM 5 for the sound source can be sent out to the external storage device 16 to the contrary. The rhythm sound source data stored in the ROM 4 and RAM 5 for the sound source are read out by using a CPU 1, an address control circuit 2, and an address switching circuit 3 to generate rhythm sounds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone generating device for generating a tone based on waveform data stored in advance,
In particular, it relates to technology for enriching the types of musical sounds that are generated.

[0002]

2. Description of the Related Art Conventionally, there is a musical tone generating apparatus for generating a musical tone by storing waveform data necessary for generating a musical tone and reading the waveform data. This tone generator is used, for example, as an automatic rhythm playing device for automatically generating a rhythm sound, and an automatic rhythm is played by using a ROM in which waveform data of a typical rhythm instrument is stored as sound source data. Was. However, since the combination of sound sources is limited, the same applicant may add an additional sound source R
A device using AM is proposed. (For example, Japanese Patent Application No. 6
0-7871). That is, a desired sound source available to the user is written in this RAM via a microphone, EXT / IN, etc., and when performing an automatic rhythm, the RAM is accessed together with the ROM to add a rhythm to the sound source. Is being generated. This brings about the effect that an arbitrary rhythm sound source can be used, but the number of sound sources that can be written in the additional sound source RAM is limited due to the cost and the like (for example, several sound sources), and the number of sound sources can be increased. The need is needed.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the invention is to provide a large number of waveform data which can be used for generating musical tones without increasing the capacity of the internal memory. It is an object of the present invention to provide a musical tone generating device that can be selected appropriately from the data.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a first internal memory means for storing predetermined waveform data and a second internal memory means capable of writing and reading a limited number of waveform data. Internal memory means, external sound detecting means for detecting an external sound, external waveform writing means for writing the external sound signal from the external sound detecting means as waveform data to the second internal memory means, and Musical tone generating means for instructing the generation of musical tones based on the waveform data of the first and second internal memory means, a removable external storage means for storing predetermined waveform data, the external storage means and the above The main point is to provide an interface means for relaying the transfer of data to and from the second internal memory means.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, in which a CPU 1 performs various controls of an automatic rhythm playing device. 2 is an address control circuit, which is used when playing an automatic rhythm.
ROM for sound source according to program data from CPU1
4 and an address to the tone generator RAM 5 are generated. This address control circuit 2 is a time-division type RO for sound source.
The M4 or the tone generator RAM 5 is configured to access a plurality of tone generators, or a plurality of address generation circuits are used to simultaneously access a plurality of tone generators. Reference numeral 3 denotes an address switching circuit provided on the address bus for switching the direction of an address. As can be seen from the configuration example shown in FIG. 4, when the AB1 signal from the CPU 1 specifies "write", that is, RA for sound source when writing data to the sound source RAM 5 via a microphone 11 described later and via an interface device (I / F) 15 described later
When exchanging data between the M5 and the external storage device 16, the address data from the CPU 1 is the sound source R
The related gate is opened so as to be supplied to the AM5, and conversely, when the AB1 signal specifies "read", the related gate is supplied so that the address data from the address control circuit 2 is supplied to the tone generator RAM5. open.

The tone generator ROM 4 is a memory for storing model waveform data of a typical rhythm musical instrument. In the example of the address map shown in FIG. 2, bass drum, snare drum, claves, hi-hat, and cymbal model waveforms. Contains data. The sound source RAM 5 is a memory for adding a sound source, and in the example shown in FIG. 2, three sound sources can be freely read and written. In addition, CPU1
The AB2 signal supplied from the RAM 5 for sound source is R for sound source.
Read / write signal for AM5.

6 is a group of various control switches (key input device)
Then, for example, a writing mode designating switch (recording switch), a reading mode designating switch (playback switch), a rhythm pattern selecting switch, a sound source selecting switch of the sound source RAM are provided. Reference numeral 7 denotes a rhythm pattern ROM (RAM) as a memory that stores various rhythm patterns in an accessible form. When a RAM (writing / reading memory) is used as this memory, the rhythm pattern desired by the user can be set in the RAM (note that the circuit for pattern writing is shown in FIG. 1). Not).

Reference numeral 8 denotes the tone generator ROM 4 and tone generator RAM 5 described above.
Is a D / A converter that converts the digital waveform data from the device into a corresponding analog signal, the output of which is the preamplifier 12,
Sound is emitted via the speaker 13. Reference numeral 11 denotes an external analog input means, which is composed of a microphone or EXT / IN. The audio signal that has passed through the external analog input means 11 is converted into corresponding digital waveform data through the preamplifier 10 and the A / D converter 9, and the tone generator RAM 5 is used.
Entered in.

The data switching circuit 14 switches the direction of the data bus. As can be seen from the configuration example shown in FIG. 5, when the AB3 signal designates "I / F transfer", the tone generator RAM 5 is used. Interface device (I / F) 15 is opened so that the data from the device is transferred to the interface device (I / F) 15 via the CPU 1 and the AB3 signal specifies “RAM transfer”. A related gate is opened so that data is transferred to the tone generator RAM 5 via the CPU 1.

The interface device (I / F) 15 serves as an interface between the removable external storage device 16 and the automatic rhythm playing device. The interface device (I / F) 15 has a different configuration according to the type of the external storage device 16 (audio cassette deck, floppy disk, etc.) and its recording system.

The operation of the automatic rhythm playing device having the above configuration will be described below. (B) R for sound source of data via external analog input means
Writing to AM 5 In this case, the user operates the write switch and the sample sound source selection switch in the various control switch groups 6. In response to the operation of the write switch, the CPU 1 designates the AB1 signal to switch and set the address switching circuit 3 so that the address data can be supplied from the CPU 1 to the tone generator RAM 5. Further, the CPU 1 writes and specifies the tone generator RAM 5 by the AB2 signal. Further, the data switching circuit 14 is set by the AB3 signal so that the data generated by the A / D converter 9 is input to the CPU 1.

Here, an analog waveform of, for example, a cowbell from the external analog input means 11 passes through the preamplifier 10 and becomes A /
It is input to the D converter 9. The CPU 1 generates a sound source RAM by an appropriate start signal (e.g., when a signal input to the CPU 1 exceeds a certain level, or in response to a start switch on various control switch groups 6).
Start address 5 and proceed sequentially to A / D
The converted cowbell waveform data is written in the sound source RAM 5. When the final address of the sample area is reached, the CPU stops writing and the writing (recording) of one sample (cowbell) is completed.

Similarly, writing of the second and third samples (conga, bongo) can be performed (see FIG. 2).

(B) Sound source RAM 5 from the external storage device 16
In this case, the user operates the digital write switch and also operates the sample sound source switch to specify the sample area of the sound source RAM 5, and further inputs from the external storage device 16 to the sound source RAM 5. A switch (for example, a numeric keypad or a character key) that specifies a sample sound is operated. In the external storage device 16, a sample name (file name) is attached as index information before each sample data, and the CPU 1 follows the file management program according to the file management program.
Search the specified sample data. After finding the data, the data is transferred to the sound source RAM 5. That is, the CPU 1 sets the address switching circuit 3 according to the AB1 signal so that the tone generator RAM 5 can be addressed by the CPU 1. Further, the tone generator RAM 5 is designated for writing by the AB2 signal. Furthermore, by the AB3 signal,
The data of the data terminals B _{0 to} B ₇ of the CPU 1 is the sound source RAM
The position of the data switching circuit 14 is set so as to be supplied to No. 5. Thus, the external storage device 16 inputs the waveform data of the designated sample sound to the CPU 1 via the interface device (I / F) 15. The CPU 1 sends the received waveform data to the tone generator RAM 5 via the data switching circuit 14, sequentially advances the address to the tone generator RAM 5, and sequentially writes the waveform data in the designated sample area. When the final address of the area is reached, the CPU 1 stops writing. This completes the process of selecting one of the many sample sounds stored in the external storage device 16 and recording it in the sound source RAM 5. Similarly, another sample sound can be selected and written in the tone generator RAM 5.

(C) Transfer from sound source RAM 5 to various control switch groups 6 In this case, the user operates the digital read switch and also operates the sample sound source switch to specify the area of the sample sound to be extracted from the sound source RAM 5. Then, a sample name (file name) required to return the data to the tone generator RAM 5 by the external storage device 16 later is input by a ten-key or the like. On the other hand, the CPU 1 generates a file name code according to the file management program and sends it to the external storage device 16 via the interface device (I / F) 15. Further, the CPU 1 uses the AB3 signal to generate the sound source RA.
The position of the data switching circuit 14 is set so that the data from M5 is input to the CPU 1, and the position of the data switching circuit 14 is set so that the data from the tone generator RAM 5 is input to the CPU 1 by the AB2 signal. Also, the tone generator RAM 5 is read out and designated by the AB2 signal, and the position of the address switching circuit 3 is set so that the CPU 1 can address the tone generator RAM 5 by the AB1 signal.

Thus, the CPU 1 sequentially accesses the designated sample area of the sound source RAM 5 to take out the data and send it to the interface unit (I / F) 15, through which the data (in the format in which the necessary data conversion has been performed). ) It is written in the external storage device 16. After the final address of the designated sample area is generated, the CPU 1 stops the reading. As a result, the data in the sound source RAM 5 that was in the designated sample area is stored in the external storage device 1
The process of transferring to 6 is completed. Similarly, the data in another sample area can be transferred to the external storage device 16.

(D) During rhythm playing In this case, the user operates the read switch and
A desired rhythm pattern among a number of rhythm patterns stored in the rhythm pattern ROM (RAM) 7 is specified by a selection switch, and the rhythm sound source selection switch is operated to select a rhythm sound source to be used.

As a result, the CPU 1 controls the address of the tone generator RAM 5 via the AB1 signal to the address control circuit 2.
The position of the address switching circuit 3 is set so that the operation is carried out by the following, and the tone generator RAM 5 is read and designated by the AB2 signal.
Further, the CPU 1 sets so that only the sound source selected by the selection of the rhythm sound source is accessed. When the user operates the rhythm start switch here, the CPU 1 is given from the rhythm pattern ROM (RAM) 7.
The ey ON command is output to the address control circuit 2. This instruction is given in the format illustrated in FIG. According to this example, at timing 1, the bass drum and hi-hat are turned on.
Will be.

In this case, the address control circuit 2 sequentially accesses the bus drum and the hi-hat area of the tone generator ROM 4 as shown in FIG. 2, and sends the data to the D / A converter 8. The corresponding analog signal is converted by the D / A converter 8, and the bass drum and hi-hat sounds are emitted through the preamplifier 12 and the speaker 13. At timing 8, sample 1 (cowbell) is turned on. In this case, the address control circuit 2 accesses the area of sample 1 in the RAM 5 for sound source, and the speaker 13 as in the above.
The sound of sample 1, that is, the cowbell sound is emitted.

[0020]

As described above, according to the present invention, the waveform data corresponding to the externally detected sound is written in the second waveform memory means which can read and write only a limited number of waveform data. And an interface means for writing and receiving the waveform data between the external storage means storing the waveform data and the second waveform memory means. By providing the tone generator, it is possible to generate a tone based on waveform data that is not prepared in advance in the tone generator. In particular, the waveform data is stored not only from the external storage means,
Since it is possible to take out the sound generated externally, it is possible to enrich the kinds of musical sounds that can be generated without increasing the storage capacity of the internal memory means for storing the waveform data. As a result, there is an advantage that it is possible to generate a variety of musical tones.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention.

2 is a diagram showing an example of a configuration address map of the tone generator ROM and RAM of FIG. 1;

FIG. 3 is a diagram showing an example of a rhythm pattern that is automatically played.

FIG. 4 is a diagram showing a configuration example of an address switching circuit of FIG.

5 is a diagram showing a configuration example of the data switching circuit of FIG.

[Explanation of symbols]

 4 ROM for sound source 5 RAM for sound source 15 Interface device (I / F) 16 External storage device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G10H 7/02

Claims (1)

[Claims] 1. A first internal memory means for storing predetermined waveform data, and a second internal memory means capable of writing and reading a limited number of waveform data.
Internal memory means, external sound detecting means for detecting an external sound, external waveform writing means for writing the external sound signal from the external sound detecting means as waveform data to the second internal memory means, Musical tone generating means for instructing the generation of musical tones based on the waveform data of the first and second internal memory means, a removable external storage means for storing predetermined waveform data, the external storage means and the above A musical tone generating apparatus comprising: an interface means for relaying data transfer between the second internal memory means and the second internal memory means.