JP2529162Y2 - Playback device - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention relates to a reproducing apparatus for randomly reproducing a plurality of items one after another.

[Prior Art and its Problems] Conventionally, automatic playing apparatuses and learning machines have been known as apparatuses for randomly reproducing a plurality of items. For example,
In an automatic performance device, an item is a song, and in a learning machine, an item is a problem (question). As an automatic performance device, a device capable of random play in which a plurality of music pieces are played one after another at random has been proposed.

In this type of device, it is common to generate a random number (random data) to designate a song. By generating random numbers in this way and specifying songs based on them, different songs can be played one after another.However, when performing multiple songs, the same song may be repeated and played. possible.
In extreme cases, it is possible that the same song will be played in succession.

Therefore, in order to remedy such a drawback, the applicant for the utility model registration has previously filed Japanese Utility Model Application No. 59-31281 (Japanese Utility Model Application No. 60-146989).
No.) has made a new proposal.

In other words, according to this prior art, the recording order of items such as songs that have been reproduced once is stored, and control is performed so that items such as the same song are not repeated and played again. To reproduce an item such as a song.

However, according to this prior art, if a random number obtained by a random number generating means matches any of the stored recording orders, the random number is generated again. Assuming the playback of a song,
The closer to the last 50 songs, the more times you have to regenerate random numbers. In other words, the more songs that have been played, the more likely it is that the song corresponding to the random number generated by the random number generation means has already been played, and the random numbers must be generated again and again.

Therefore, there is a drawback that it takes a long time to designate a music piece and it is not suitable for practical use unless other methods are adopted.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a reproducing apparatus that can more easily determine a random reproduction order of a plurality of items quickly.

[Points of the invention]

Item storage means for storing a plurality of items, instruction data storage means for storing a plurality of instruction data indicating each item stored in the item storage means arranged in a predetermined order, and random data for generating random data Generating means; control means for changing the arrangement order of a plurality of pieces of instruction data indicating each item stored in the instruction data storage means in accordance with random data generated from the random data generating means; and The present invention is characterized in that it comprises a reproducing means for sequentially reading out and reproducing the corresponding items from the item storage means in accordance with the changed arrangement order of the plurality of instruction data in the instruction data storage means.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to an electronic musical instrument having an automatic performance function capable of random play will be described in detail with reference to the drawings.

FIG. 1 shows an overall circuit configuration diagram of an electronic musical instrument.
Denotes a keyboard / switch unit, which includes a keyboard for specifying a scale for manual performance, a switch for specifying a tone, and the like. The keyboard / switch unit 1 includes a switch for designating random play.

Reference numeral 2 denotes a CPU including a microprocessor, which controls the overall operation of the present system. Then, the CPU 2 instructs the tone generator circuit 3 to specify a scale, key-on, key-off, etc. in order to perform a manual performance or an automatic performance. A sound source signal generated from the sound source circuit 3 is provided to the audio device 4 and converted into an acoustic signal.

In the figure, reference numeral 5 denotes a performance external memory, specifically, ROM, R
Various types of storage / playback media such as AM cards, CDs, and DATs and their playback devices, and a CPU 2 via an I / O (interface) 6
Connected to The performance external memory 5 can store a plurality of songs, for example, 50 songs. In the following description, the random play of 10 songs will be described in a simplified manner.

Reference numeral 7 in the figure denotes a sequencer RAM 7, in which performance information input from the keyboard / switch unit 1 is written and used for automatic performance, and read out from the performance external memory 5 as necessary. The music information is once written in the sequencer RAM 7 and then used for automatic performance. This performance information
Event information indicating contents such as key-on and off and time information thereof (for example, determined by time information between events) are stored as a pair.

In the figure, reference numeral 8 denotes a tempo clock generator which determines the tempo of an automatic performance (including a random play). Although not shown, the tempo clock generation rate is changed by a player's operation.

Reference numeral 9 denotes a working memory, which realizes various functions in cooperation with the CPU 2, and for random play,
At least CATs (CAT1 to CAT10) area and DOGs (DOG
1 to DOG 10).

Next, the operation of this embodiment will be described. FIG. 2 shows a timer interrupt routine which is executed each time a tempo clock is given from the tempo clock generator 8, and executes a process of automatic performance. Of course, in another mode of the automatic performance, for example, in the reproduction of only the music number designated, the reproduction operation is stopped in step S6 described later.

Here, description will be made assuming that random play is designated. First, in step S1, the time counter inside the CPU 2 is incremented. Next, the process proceeds to step S2 to judge whether or not the automatic performance information matches the event time information (time information) of the address. If NO, the process returns to the main routine (not shown) without any processing.

Then, in step S2, when a determination of YES is made, the process proceeds to step S3, and the time counter is initialized. In the following step S4, performance processing is performed. Specifically, an instruction such as key-on or off-off to be performed at the timing is given to the tone generator circuit 3.

Therefore, the performance external memory 5 (or the sequencer
The processing for the performance information at the address of the specified song read from the RAM 7) is performed under the control of the CPU 2.

Next, the sequencer address register is incremented. This can be achieved by incrementing a predetermined memory in the CPU 2, and by using the sequencer address register, the performance external memory 5 (or the sequencer RAM) is used.
7) The address is specified.

In step S6, as a result of sequentially incrementing the address, it is determined whether or not the step has been advanced to the final address of the song. If NO, the process returns to the main routine. Therefore, the automatic performance of the music is executed by repeating steps S1 to S6.

Then, if the performance process proceeds to the last address of the song, the process proceeds to step S7, where the start address of the next song is
Set in the sequencer address register to prepare for the next performance. The next song is specified by the song number information of the area corresponding to the DOGs in the working memory 9.

In step S8, multiple songs (in this case, 10
A judge is made as to whether or not the performance of the (song) has been continuously performed in a random order. If less than 10 songs have not been performed yet, a NO judge is performed in step S8, and the process returns to the main routine.

However, if all songs have already been played,
Proceed from step S8 to step S9, and the working memory 9
Transfer the contents of CATs in DOGs.

This (CATs) means music number data set in random order in the ten areas CAT1 to CAT10 as described below, and (DOGs) means the same ten areas DOG1 to CAT10.
It has DOG10 and holds the transferred data. As mentioned above, random play of multiple songs is based on DOGs
It is done according to the contents of.

FIG. 3 shows a timer interrupt routine executed by a timer interrupt every predetermined time, and in this case, is a flowchart showing the most characteristic processing.

This timer interrupt is performed at intervals independent of the above-described tempo clock.

Now, step T1 of this timer interrupt routine
Then, a random number is generated and stored in the X register in the CPU 2. Of course, the random number may be generated in advance by an appropriate method, and the random number may be captured in this step T1. Since the number of songs in the random play is now 10 songs, it is assumed that these random numbers are generated in the values of 0 to 9. Each random number is assigned to each of 10 separate songs in the external memory 5 for performance or the RAM 7 for sequencer. You will specify the address. This will be clear from what has already been explained.

In the next step T2, the area CA of the working memory 9 is
The address specifying the head area CAT1 in Ts is input to the Z register in the CPU2. The address designating CAT1 is predetermined, and the subsequent CAT2 to CAT10 are designated by incrementing the address by +1.

In step T3, it is determined whether or not the content of the area addressed by the content of the Z register matches the random number stored in the X register. If they do not match, the process proceeds to step T4, where the Z register is incremented to specify the next area (CAT2 in this case), and the process returns to step T3.

FIG. 4 shows this operation, and it is assumed that, for example, values 0 to 9 are sequentially recorded in CATs as shown in the left column of the figure by power-on initialization. If the random number generated in the first timer interrupt is 8, the steps T3 and T4 are repeated from CAT1 to CAT8.

Then, since the same value as the random number 8 of the X register is entered in the area of CAT9, YES is determined in step T3, and the process proceeds from step T3 to step T5.

In step T5, the value (now 0) contained in the start address CAT1 is taken out to the Y register in the CPU 2, and it is taken in step T6 to the address specified by the Z register (in this case, As is apparent, CAT9 is specified in the Z register.).

Subsequently, in step T7, the random number generated this time is input to CAT1, which is the head address. As a result, at the time of initialization, CATs were arranged in order from 0 to 9,
One random number is generated, as shown in the right column of FIG.
The sequence was 0,9.

In this way, by executing the processing of steps T1 to T7 for the random numbers successively generated by the timer interrupt, the values of 0 to 9 in the array in CATs become completely random. Is understood.

By transferring the contents of the CATs obtained through the processes after a plurality of (multiple) timer interrupts to the DOGs at the time of executing the above-described step S9 (see FIG. 2), the next random number is obtained. The order of play is specified randomly without repeating the same song.

In the above-described embodiment, the number of music pieces to be continuously played is set to 10, but the number is not limited to 10. The same can be applied to a case where a song to be played at random is designated in advance, and a song is randomly selected from the songs. That is, for example, 100
In the case where there is a storage medium of music pieces, and if desired 10 music pieces are to be randomly played, the user selects 10 music pieces in advance, and the music piece numbers of the 10 music pieces may be determined by the CPU 2 as 0-9.

In the embodiment, random data is input to the area of CAT1 in the timer interrupt routine (see step T7). However, the present invention is not limited to this. If step T5 is set to Y ← (CATj), step T7 Should be changed to CATj ← X. Here, j is one of 1 to 10.

Furthermore, while the above is an application of the present invention to the automatic performance of music on an electronic musical instrument, the invention can also be applied to the playback of CDs, DATs, or music tapes, and is also applicable to various learning machines. obtain. In other words, when the order of presenting the questions is made random, the processing shown in FIG. 3 may be performed in determining the order.

In addition, the present invention can be applied to a general device that has a plurality of items and reproduces the items randomly and sequentially without repeating the same items.

[Effect of the invention]

As described in detail above, the present invention changes the arrangement of the instruction data indicating the items arranged in a predetermined order in advance by random data, and sequentially reads and reproduces a plurality of items according to the changed arrangement order. ing. As a result, since the arrangement of the instruction data is merely changed according to the random data, there is no problem that the same item is repeatedly reproduced, and it is easy to determine the random arrangement, and it takes no time for the determination process. Benefits arise.

[Brief description of the drawings]

FIG. 1 is an overall circuit diagram of an embodiment of the present invention, FIG. 2 is a diagram showing a flowchart of an interrupt routine when a tempo clock arrives, and FIG. 3 is a flow of processing executed by a predetermined timer interrupt. Diagram showing a chart,
FIG. 4 is a diagram showing an operation state of the embodiment. 2 ... CPU, 3 ... tone generator circuit, 5 ... external memory for performance, 7 ... RAM for sequencer, 9 ... working memory.

Claims (2)

(57) [Scope of request for utility model registration] 1. Item storage means for storing a plurality of items, instruction data storage means for storing a plurality of instruction data indicating each item stored in the item storage means arranged in a predetermined order, and random data A random data generating means for generating, and a control means for changing the arrangement order of a plurality of instruction data indicating each item stored in the instruction data storage means corresponding to the random data generated from the random data generating means. Reproduction means for sequentially reading and reproducing corresponding items from the item storage means in accordance with the arrangement order of the plurality of instruction data in the instruction data storage means changed by the control means. apparatus. 2. The random data generating means randomly generates any one of a plurality of instruction data stored in the instruction data storage means as random data, and the control means generates the random data. Means for retrieving instruction data matching the random data generated from the means from the instruction data storage means, and changing the arrangement order by replacing the matched instruction data with the instruction data at a specific position in the array. The playback device according to claim 1, wherein the utility model is registered.