JP5375869B2 - Music playback device, music playback method and program - Google Patents

Description

  The present invention relates to a music playback device for playing back music. Specifically, the present invention relates to an apparatus that outputs music by switching between a software sound source and a hardware sound source based on music data when reproducing the music.

  2. Description of the Related Art Conventionally, a playback apparatus that synthesizes musical sounds based on music data when playing back music is known. Patent Document 1 discloses a music reproducing device that outputs a sound by using a software sound source and a hardware sound source when reproducing a music. In the music reproducing apparatus described in Patent Literature 1, when note-on information for newly starting sounding is read, if the CPU usage rate is small, sound is generated by a software sound source. Also, when note-on information for newly starting sounding is read, if the CPU usage rate is high, sound is generated by a hardware sound source.

JP 2005-283774 A

  An important function of the music playback device is a function of playing back music so that the user of the music playback device can hear it smoothly. Although the CPU performance is improved, in order to reproduce all the music pieces with the software sound source, the CPU load becomes high, and an unfavorable situation may occur in order to smoothly reproduce the music pieces. When predetermined sound generation is performed by a software sound source, the CPU load may increase depending on the sound generation content. Also, the CPU load may vary depending on the performance information of the music being played. In the technique described in Patent Document 1, a process of detecting the CPU usage rate is generated each time note-on information for newly starting sound generation is read out. Absent. For this reason, there has been a problem that during the reproduction of music, reproduction cannot be performed smoothly due to insufficient CPU performance.

  The present invention has been made in view of the above. SUMMARY OF THE INVENTION An object of the present invention is to provide a music playback device and music that can avoid the fact that playback cannot be performed smoothly due to insufficient CPU performance during music playback even when software and hardware sound sources are used. It is to provide a reproduction method and a program.

  According to the first aspect of the present invention, storage means for storing MIDI data including a performance signal, a hardware sound source that generates sounds of a plurality of musical instruments based on the MIDI data stored in the storage means, Based on the MIDI data stored in the storage means, a software sound source for generating sound, a first determination means for determining MIDI data to be reproduced from the MIDI data stored in the storage means, and the first A second determining means for determining a processing load when the MIDI data determined by the determining means is reproduced by a software sound source; and whether or not the processing load determined by the second determining means is greater than a predetermined processing load. A determination means for determining and a musical instrument to be played back by the hardware sound source when the determination means determines that the load is greater than a predetermined processing load. A third determining means for determining and a musical instrument determined by the third determining means are output by the hardware sound source, and a sound other than the instrument determined by the third determining means is generated by the software sound source. 1 control means, and a second control means for outputting the MIDI data determined by the first determination means by the software sound source when the determination means does not determine that the load is larger than the predetermined processing load. Is a music reproducing apparatus characterized by the above.

  According to a second aspect of the present invention, the third determining means gives priority to an instrument having a small sound volume generated by the software sound source based on MIDI data stored in the storage means, and It is determined as a musical instrument to be played back by a hardware sound source.

  According to a third aspect of the present invention, the third determining means has a sound volume generated by the software sound source based on MIDI data stored in the storage means smaller than a predetermined value, or The smallest musical instrument is determined as a musical instrument to be reproduced by the hardware sound source.

  According to a fourth aspect of the present invention, the third determination means gives priority to an instrument having a weak velocity indicating the strength of sound as a loudness generated by the software sound source, and uses the hardware sound source. It is determined as a musical instrument to be reproduced.

  According to a fifth aspect of the present invention, the third determining means determines the musical instrument whose velocity is weaker or weaker than a predetermined value as a musical instrument to be reproduced by the hardware sound source. .

  According to the sixth aspect of the present invention, the first determination step for determining the MIDI data to be reproduced from the MIDI data stored in the storage means for storing the MIDI data including the performance signal, and the first determination step. A second determination step for determining a processing load when reproducing the MIDI data determined by the software sound source, and determining whether or not the processing load determined by the second determination step is greater than a predetermined processing load A determination step; and a third determination step of determining an instrument to be played back by a hardware sound source that generates sounds of a plurality of instruments based on MIDI data when it is determined by the determination step that it is greater than a predetermined processing load; The musical instrument determined in the third determination step is output by the hardware sound source, and the third determination step is performed. If it is not determined that the sound other than the instrument determined by the step is generated by a software sound source that generates sound based on MIDI data, and the determination step exceeds the predetermined processing load, And a second control step of outputting the MIDI data determined in the first determination step by the software sound source.

  According to the seventh aspect of the present invention, the first determination step for determining the MIDI data to be reproduced from the MIDI data stored in the storage means for storing the MIDI data including the performance signal, and the first determination step. A second determination step for determining a processing load when reproducing the MIDI data determined by the software sound source, and determining whether or not the processing load determined by the second determination step is greater than a predetermined processing load A determination step; and a third determination step of determining an instrument to be played back by a hardware sound source that generates sounds of a plurality of instruments based on MIDI data when it is determined by the determination step that it is greater than a predetermined processing load; The musical instrument determined in the third determination step is output by the hardware sound source, and the third determination step is performed. If it is not determined that the sound other than the instrument determined by the step is generated by a software sound source that generates sound based on MIDI data, and the determination step exceeds the predetermined processing load, A program for causing a computer to execute a second control step of outputting the MIDI data determined in the first determination step by the software sound source.

  According to the first aspect of the present invention, the second determining unit determines a processing load when the MIDI data determined by the first determining unit is reproduced by the software sound source. The determination unit determines whether or not the processing load determined by the second determination unit is greater than a predetermined processing load. The third determining means determines an instrument to be played back by the hardware sound source when the determining means determines that the predetermined processing load is greater. Therefore, it is possible to grasp the processing load when a sound is generated by a software sound source before reproducing the music, and it is possible to determine whether to use a software sound source or a hardware sound source when generating a sound. As a result, even when a software sound source and a hardware sound source are used, it is possible to avoid that playback cannot be performed smoothly due to insufficient CPU performance during music playback.

  According to the second aspect of the present invention, the third determining means gives priority to an instrument having a small sound volume generated by the software sound source based on the MIDI data stored in the storage means, and the hardware sound source. To determine the instrument to be played. An instrument with a small sound volume is difficult for a user who listens to music to hear. For this reason, priority is given to instruments with low sound volume and switching from a software sound source to a hardware sound source prevents the user from recognizing changes in music, and playback with insufficient CPU performance during music playback Can be avoided.

  According to the third aspect of the present invention, the third determining means is a musical instrument in which the volume of the sound generated by the software sound source based on the MIDI data stored in the storage means is smaller than or smaller than a predetermined value. Is determined as a musical instrument to be played back by a hardware sound source. As a result, by switching the musical instrument whose sound volume is smaller than the specified value or the smallest musical instrument from the software sound source to the hardware sound source, it is possible to prevent the user from recognizing the change of the music and playing the music. In addition, it is possible to prevent the reproduction from being performed smoothly due to insufficient CPU performance.

  According to the fourth aspect of the present invention, the third determining means gives priority to an instrument having a low velocity indicating the intensity of sound as a loudness generated by a software sound source, and reproduces the sound using a hardware sound source. It is determined as follows. Musical instruments with weak sounds are difficult to hear for users who listen to music. For this reason, priority is given to musical instruments with weak sounds, and switching from a software sound source to a hardware sound source suppresses the user from recognizing changes in music, and playback is possible due to insufficient CPU performance during music playback. It is possible to avoid things that cannot be performed smoothly.

  According to the fifth aspect of the present invention, the third determining means determines the instrument whose velocity is weaker or weaker than a predetermined one as the instrument to be played back by the hardware sound source. As a result, it is possible to prevent the user from recognizing changes in music by switching the software sound source from the software sound source to the hardware sound source by switching the weaker or weaker musical instrument than the predetermined sound, and the CPU's during reproduction of the music It can be avoided that playback is not smooth due to insufficient performance.

  According to the invention described in claim 6 or claim 7, the second determination step determines a processing load when the MIDI data determined in the first determination step is reproduced by the software sound source. The determination step determines whether or not the processing load determined by the second determination step is greater than a predetermined processing load. The third determining step determines an instrument to be played back by the hardware sound source when it is determined by the determining step that the load is larger than the predetermined processing load. Therefore, it is possible to grasp the processing load when a sound is generated by a software sound source before reproducing the music, and it is possible to determine whether to use a software sound source or a hardware sound source when generating a sound. As a result, even when a software sound source and a hardware sound source are used, it is possible to avoid that playback cannot be performed smoothly due to insufficient CPU performance during music playback.

It is a figure which shows an example of the schematic block diagram which shows the schematic block diagram of the music reproduction system of this embodiment, and the electrical structure of the music reproduction apparatus. It is a conceptual diagram which shows the memory | storage state by which the 1st table of this embodiment is memorize | stored in the 1st table memory area 162. It is a conceptual diagram which shows the memory | storage state by which the 2nd table of this embodiment is memorize | stored in the 2nd table storage area 163. FIG. It is a flowchart which shows the main operation | movement of the music reproduction apparatus 1 of this embodiment. It is a flowchart which shows the performance start pre-process of this embodiment. It is a flowchart which shows the switch musical instrument selection process of this embodiment. It is a flowchart which shows the performance process of this embodiment.

[Best Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment to which the invention is applied will be described with reference to the drawings.

[Outline configuration of music playback system]
FIG. 1 is an explanatory diagram illustrating a schematic configuration of a music playback system according to the present embodiment. As shown in FIG. 1, the music playback system includes a music playback device 1 and a navigation 2. The music reproducing device 1 is a so-called karaoke commander. The navigation 2 is a device that sends a command to the music playback device 1 by infrared rays. A user operates an operation unit of the navigation 2 (not shown). By operating the operation unit, a predetermined operation signal is transmitted from the navigation 2 to the music reproducing device 1. For example, by operating the navigation 2, karaoke music is reserved. Therefore, an operation signal indicating the reserved karaoke music is transmitted from the navigation 2 to the music reproducing device 1. When receiving the operation signal, the music playback device 1 temporarily stores the music included in the operation signal as a reserved music in a RAM or the like.

  The navigation 2 is connected to an access point 110 installed at each karaoke store or the like. The access point 110 is a wireless LAN, for example. The access point 110 can be connected to the Internet such as a WAN via the router 120. The navigation 2 is connected to the LAN 100 in the karaoke store via the access point 110. Thereby, the navigation 2 can transmit / receive information to / from the music reproducing device 1 connected to the LAN 100.

  As shown in FIG. 1, the music reproducing apparatus 1 includes a control unit 12, a LAN interface unit 14, a storage unit 16, an operation processing unit 22, a MIDI sequencer 25, a software sound source 27, a video RAM 32, and a video. And a control unit 38. The software sound source 27 of this embodiment is an example of the software sound source of the present invention.

  The control unit 12 controls various configurations of the music playback device 1. The control unit 12 is a controller composed of, for example, a CPU and a RAM.

  The LAN interface unit 14 is connected to the music reproducing device 1 and the LAN 100. The LAN interface unit 14 enables the music reproducing device 1 to communicate with the Internet and the navigation 2.

  The storage unit 16 includes a hard disk (HD) that stores various types of information. The storage unit 16 includes a MIDI data storage area 161, a first table storage area 162, a second table storage area 163, and a program storage area 164. The MIDI data storage area 161 stores MIDI data. The MIDI data is performance data reproduced by the music reproducing apparatus 1. The MIDI data includes a note number, velocity, note off, note on, program change, channel, and track level. The note number is a number representing the pitch of the sound. The note number is, for example, the pitch of the sound assigned 0 as the lowest sound and 127 as the highest sound. Velocity is the strength of sound. Note-off is a command to stop the sound. Note-on is a command to make a sound. Program change is a command to change the tone. The channel indicates a musical instrument that is sounded by MIDI data. The track level indicates the loudness of the sound that is generated. At the note-on timing, a performance composed of a note number, velocity, program change, channel and track level is started. At the note-off timing, the performance composed of the note number, velocity, program change, channel and track level is completed. The MIDI data storage area 161 of this embodiment is an example of the storage means of the present invention.

  The first table storage area 162 stores the first table. FIG. 2 is a conceptual diagram showing a storage state in which the first table is stored in the first table storage area 162. First, the MIDI data to be reproduced is determined from the MIDI data stored in the MIDI data storage area 161. The determined MIDI data is read by the control unit 12. Various sounds output after the note-on timing in the read MIDI data are stored as records in the first table. That is, the first table stores each type of sound output after the note-on timing and the output timing at which the sound is output in association with each other. Specifically, as shown in FIG. 2, the sound generated from the note number, program change number, velocity, channel and track level is associated with the output timing at which the sound is output in the first table. Remembered. As a result, various sounds output by the read MIDI data and the output timing of the sounds are stored as records in the first table. In the present embodiment, a predetermined number of samples is stored as the output timing, but the present invention is not limited to this. A time indicating the output timing may be stored as an output timing as a time series. When the note-off timing is detected in the read MIDI data, the record stored in the first table is deleted. As a result, the number of pronunciations generated between note-on and note-off is determined. The first table is used to determine the processing load for reproducing music by the music reproducing device 1. A detailed method for determining the processing load will be described later.

  The second table storage area 163 stores the second table. The second table is a table that stores sounds output by the hardware sound source 26. FIG. 3 is a conceptual diagram showing a storage state in which the second table is stored in the second table storage area 163. Similar to the first table, the second table stores the sound generated from the note number, program change number, velocity, channel and track level in association with the output timing at which the sound is output. Hereinafter, a method for generating the second table will be described.

  The program storage area 164 stores a program that executes main operation processing, pre-performance start processing, switching instrument selection processing, and performance processing of the music playback device 1. Note that the program of the music playback device 1 of the present embodiment may be downloaded from a predetermined server on the network, for example, or may be recorded on a recording medium such as a CD-ROM and a drive of the recording medium, for example You may make it read via.

  First, the MIDI data to be reproduced is determined from the MIDI data stored in the MIDI data storage area 161. The determined MIDI data is read by the control unit 12. Various sounds output after the note-on timing in the read MIDI data are stored as records in the first table. As a result, the number of pronunciations reproduced by the MIDI data is determined between note-on and note-off. In the present embodiment, the number of pronunciations is used as the processing load of the music playback device 1. In the present embodiment, basically, a sound is generated and output by the software sound source 27. For this reason, if the number of pronunciations is large between a predetermined note-on and a note-off, the processing load of the software sound source 27 becomes large, and there is a problem that sound is not output smoothly. In this embodiment, in order to solve the above problem, in this embodiment, when the number of pronunciations is larger than a predetermined number, the sound to be output by the hardware sound source 26 is determined among the sounds stored in the first table. The The sound output from the hardware sound source 26 is stored in the second table storage area 163 as a second storage table. The predetermined number used for determining whether or not the processing load is large may be determined by the performance of the control unit 12 of the music playback device 1. In addition, the number of pronunciations may be used as the processing load. For example, the processing load when sound is actually output may be determined. Further, the CPU load per sound generation may be determined in advance, and may be determined so that the CPU load increases in proportion to the number of sound generations.

  In particular, in this embodiment, when it is determined that the processing load is equal to or greater than a predetermined value, a record with a low track level is determined from the records stored in the first table. In the present embodiment, when it is determined that the processing load is equal to or greater than a predetermined value, a record having a low velocity is determined from the records stored in the first table. The determined record is output by the hardware sound source 26. In general, the sound quality of the software sound source 27 is better than that of the hardware sound source 26. This is because the software sound source uses better waveform and effector quality than the hardware sound source. However, when sound data is generated by the software sound source 27, the processing load on the CPU and the like increases. For this reason, in this embodiment, when the processing load becomes a predetermined value or more, the control unit 12 causes the hardware sound source 26 to output a part of the sound output from the music reproducing device 1. Thereby, the processing load of the music reproducing apparatus 1 can be reduced. In this embodiment, when the processing load is equal to or greater than a predetermined value, a record having a low track level or a low velocity is determined as a sound to be output to the hardware sound source. This is because the sound output by a record with a low track level or a low velocity is weak in volume or intensity, so even if it is output by a hardware sound source, there is little discomfort for the user. It is. In the example shown in FIGS. 2 and 3, the record number “3” having the smallest track level “12” is determined from the records shown in FIG. The determined record is registered in the second table as shown in FIG.

  The MIDI sequencer 25 is connected to a hardware sound source 26 and a software sound source 27. The hardware sound source 26 is hardware that generates an output signal for causing the speaker 30 to output sound. The MIDI sequencer 25 causes the hardware sound source 26 and the software sound source 27 to generate an output signal based on the MIDI data and the second table. The generated output signal is connected to the mixing amplifier 28. Based on the MIDI data, the MIDI sequencer 25 determines an output signal to be generated by the hardware sound source 26. The hardware sound source 26 of this embodiment is an example of the hardware sound source of the present invention.

  The software sound source 27 generates an output signal for outputting sound from the speaker 30. The control unit 12 controls the software sound source 27 and causes the software sound source to generate sound data. The software tone generator 27 generates an output signal for outputting sound from the speaker 27 based on the MIDI data transmitted from the MIDI sequencer 25. Sound can be output without using the hardware sound source 26. Since the sound is output from the software sound source 27, the sound can be output even without a hardware sound source.

  The hardware sound source 26 and the software sound source 27 are connected to a mixing amplifier 28. In addition, the mixing amplifier 28 is connected to the speaker 30. The mixing amplifier 28 synthesizes signals output from the hardware sound source 26 and the software sound source 27. The synthesized signal is output to the speaker 30. As a result, sound is output from the speaker 30.

  In addition, the mixing amplifier 28 is connected to the microphone control unit 29. The microphone control unit 29 is connected to a microphone (not shown). Based on the information input by the microphone, the microphone control unit generates an audio signal. The control unit 12 outputs the generated audio signal to the mixing amplifier 28. Based on the audio signal, the mixing amplifier 28 outputs the audio input from the microphone through the speaker 30.

  The operation processing unit 22 is connected to the operation unit 18 and the infrared receiving unit 20. The operation unit 18 is operated by the user of the music playback device 1. An input signal operated by the operation unit 18 is output to the operation processing unit 22. The infrared receiving unit 20 receives infrared rays transmitted by the navigation 2. The received infrared signal is output to the operation processing unit 22. The operation processing unit 22 determines the operation content based on each output signal. Based on the determined operation content, the control unit 12 controls the music playback device 1.

  The video RAM 32 temporarily stores video information stored in the storage unit 12. The video RAM 3 is connected to the video control unit 38. The video control unit is connected to the display unit 36. The control unit 12 outputs a command for outputting the video information temporarily stored in the video RAM 32 to the video RAM 32 and the video control unit 38. Based on an instruction from the control unit 12, the video control unit 38 causes the display unit 36 to output video information stored in the video RAM.

[Main operation]
The operation and action of the music reproducing device 1 of the present embodiment having the above-described configuration will be described with reference to the accompanying drawings. First, operation | movement and an effect | action of the music reproduction apparatus 1 are demonstrated with reference to an accompanying drawing. FIG. 4 is a flowchart showing a processing procedure of the main operation in the music reproducing device 1. The main operation of the music reproducing device 1 is performed by connecting an external power source such as a commercial power source and the node device via a power source or an outlet. The processing shown below is processed by the control unit 12.

  First, in step S101, silence data with the number of pronunciations of 1 is reproduced. In step S102, the CPU load included in the control unit 12 when the silence data having the number of soundings of 1 is reproduced is measured. In step S103, the measured CPU load is temporarily stored in the RAM provided in the control unit 12. As a result, a CPU load serving as a reference for determining the processing load is determined.

  In step S104, it is determined whether there is a reserved song. Specifically, it is determined whether or not reserved music is temporarily stored in the RAM of the control unit 12. If it is determined that there is a reserved music (step S104: YES), step S105 is executed. If it is not determined that there is a reserved music (step S104: NO), step S109 is executed.

  Next, in step S105, a predetermined music piece is selected. The MIDI data corresponding to the reserved music temporarily stored in the RAM is determined as the music to be played. Then, the MIDI data to be reproduced is determined from the MIDI data stored in the MIDI data storage area 161. The determined MIDI data is temporarily stored in the RAM provided in the control unit 12. The control part 12 and step S105 of this embodiment are an example of the 1st determination means of this invention. Step S105 of the present embodiment is an example of a first determination step of the present invention.

  In step S106, pre-performance start processing is executed. Details of the pre-performance start process will be described later with reference to FIG.

  In step S107, performance processing is executed. Details of the performance processing will be described later with reference to FIG.

  In step S108, it is determined whether there are other reserved music pieces. Specifically, it is determined whether or not the reserved music is temporarily stored in the RAM other than the music selected in step S105. If it is determined that there is a reserved song temporarily stored in the RAM (step S108: YES), step S105 is executed again. If it is not determined that there is a reserved song temporarily stored in the RAM (step S108: NO), step S109 is executed.

  In step S109, it is determined whether or not the music playback device 1 is turned off. When it is determined that the power of the music reproducing device 1 is turned off (step S109: YES), the main operation is terminated. If it is determined that the power of the music reproducing device 1 is turned off (step S109: NO), step S104 is executed again.

[Pre-performance start]
Here, the pre-performance start processing operation and action of the music reproducing device 1 will be described with reference to the accompanying drawings. FIG. 5 is a flowchart showing a processing procedure of performance start pre-processing in the music playback device 1.

  In step S201, the MIDI data selected in step S105 is read into the RAM of the control unit 12. The MIDI data selected in step S105 is temporarily stored in the RAM.

  In step S202, it is determined whether or not the music of the MIDI data read in step S201 has been completed. Whether or not the music of the MIDI data is finished is determined by whether or not the performance included in the MIDI data is finished. If it is determined that the music of the MIDI data has been completed (step S202: YES), the pre-performance start process is terminated. If it is not determined that the MIDI data song has been completed (step S202: NO), step S203 is executed.

  In step S203, the MIDI data is analyzed. Specifically, the MIDI data is read out in a time series in which a sound included in the MIDI data temporarily stored in the RAM is output.

  In step S204, it is determined whether or not there is a note-on in the MIDI data read in step S203. When it is determined that there is a note-on (step S204: YES), step S205 is executed. If it is not determined that there is a note-on (step S204: NO), step S206 is executed.

  In step S205, the note number, program change number, velocity, channel, track level, and output timing are stored as a first table in the first table storage area. What is stored in step S205 is information regarding the sound output after the note-on is determined in step S204.

  In step S206, it is determined whether or not there is a note-off in the MIDI data read in time series in step S203. When it is determined that there is a note-off (step S206: YES), step S207 is executed. If it is not determined that there is a note-off (step S206: NO), step S203 is repeatedly executed.

  In step S207, the record determined as note-off is deleted from the first table stored in the first table storage area 162.

  In step S208, the processing load of the music reproducing device 1 is determined based on the number of records in the first table and the CPU load per number of pronunciations registered in step S103. Specifically, in step S102, the CPU usage rate is used as the CPU load when outputting the number of sounds. In step S102, the usage rate of the CPU used per number of sounds is determined. In the present embodiment, a value obtained by multiplying the usage rate of the CPU per number of utterances by the number of records in the first table is determined as the processing load. In addition to the above method, the processing load of the music reproducing device 1 may be determined using the number of records registered in the first table. The more records registered in the first table, the more the number of pronunciations. For this reason, the processing load of the music reproducing device 1 can be determined by the number of records. The control part 12 and step S208 of this embodiment are an example of the 2nd determination means of this invention. Step S208 of the present embodiment is an example of a second determination step of the present invention.

  In step S209, it is determined whether or not the processing load is above a predetermined value. In the present embodiment, it is determined whether or not the CPU usage rate determined in step S208 is a predetermined value or more. When it is determined that the processing load is above the predetermined value (step S209: YES), step S210 is executed. If it is not determined that the processing load is above the predetermined value (step S209: NO), step S202 is executed. In addition to this method, it may be determined in step S209 whether or not the number of records registered in the first table is a predetermined number or more. In this case, when it is determined that the number of records is equal to or greater than the predetermined number (step S209: YES), step S210 is executed. If it is not determined that the number of records is equal to or greater than the predetermined number (step S209: NO), step S202 is executed. The control unit 12 and step S209 of this embodiment are an example of a determination unit of the present invention. Moreover, step S209 of the present embodiment is an example of a determination step of the present invention.

  In step S210, a switching instrument selection process is executed. Details of the switching instrument selection process will be described later with reference to FIG. In step S210, a record to be registered in the second table is determined from the records stored in the first table. Specifically, a record determined as a switching instrument candidate by a switching instrument selection process described later is determined as a record to be registered in the second table. The control part 12 and step S210 of this embodiment are an example of the 3rd determination means of this invention. Further, step S210 of the present embodiment is an example of a third determination step of the present invention.

  In step S211, the record determined in step S210 is added to the second table stored in the second table storage area 163. Specifically, a record among the switching instrument candidates determined by the switching instrument selection process described later is added in step S210.

[Switching instrument selection process]
Here, the switching musical instrument selection processing operation and action of the music reproducing device 1 will be described with reference to the accompanying drawings. FIG. 6 is a flowchart showing the processing procedure of the switching instrument selection process in the music playback device 1.

  In step S301, N is set to “0”. The set value is temporarily stored in a predetermined storage area of the RAM of the control unit 12.

  In step S302, the Nth record is acquired from the first table stored in the first table storage area 162. Specifically, the “0” th record is acquired from the first table.

  In step S303, the record acquired in step S302 is temporarily stored in the RAM as a switching instrument candidate. Specifically, the “0” th record is temporarily stored in the RAM as a switching instrument candidate.

  In step S304, it is determined whether or not the “N + 1” -th record exists in the first table. Specifically, when N is “0”, it is determined whether or not the “1” -th record is registered in the first table. If it is determined that the “N + 1” -th record exists (step S304: YES), step S305 is executed. If it is not determined that the “N + 1” -th record exists (step S304: NO), step S316 is executed.

  In step S305, the “N + 1” th record is acquired from the first table. The acquired “N + 1” th record is temporarily stored in a predetermined storage area of the RAM of the control unit 12.

  In step S306, the track level of the “N + 1” th record acquired in step S305 is compared with the track level of the record determined as the switching instrument candidate in step S303 or step S314.

  In step S307, it is determined whether or not the track level of the “N + 1” th record is lower than the track level of the record determined as the switching instrument candidate in step S303 or step S314. If it is determined that the track level of the “N + 1” th record is lower (step S307: YES), step S314 is executed. If it is not determined that the track level of the “N + 1” -th record is lower (step S307: NO), step S308 is executed.

  In step S308, it is determined whether the track level of the “N + 1” th record acquired in step S305 is equal to the track level of the record determined as the switching instrument candidate in step S303 or step S314. If it is determined that the track levels are equal (step S308: YES), step S309 is executed. If it is not determined that the track levels are equal (step S308: NO), step S315 is executed.

  In step S309, the velocity of the “N + 1” th record acquired in step S305 is compared with the velocity of the record determined as the switching instrument candidate in step S303 or step S314.

  In step S310, it is determined whether or not the velocity of the “N + 1” th record is smaller than the velocity of the record determined as the switching instrument candidate in step S303 or step S314. If it is determined that the velocity of the “N + 1” -th record is smaller (step S310: YES), step S314 is executed. If it is not determined that the velocity of the “N + 1” -th record is smaller (step S310: NO), step S311 is executed.

  In step S311, it is determined whether or not the velocity of the “N + 1” th record acquired in step S305 is equal to the velocity of the record determined as the switching instrument candidate in step S303 or step S314. If it is determined that the velocities are equal (step S311: YES), step S312 is executed. If it is not determined that the track levels are equal (step S311: NO), step S315 is executed.

  In step S312, the note number of the “N + 1” th record acquired in step S305 is compared with the note number of the record determined as the switching instrument candidate in step S303 or step S314.

  In step S313, it is determined whether or not the note number of the “N + 1” th record is larger than the note number of the record determined as the switching instrument candidate in step S303 or step S314. If it is determined that the note number of the “N + 1” -th record is larger (step S313: YES), step S314 is executed. If it is not determined that the note number of the “N + 1” -th record is larger (step S313: NO), step S315 is executed. In step S313 of the present embodiment, it is determined whether or not the note number is large, but the present invention is not limited to this. In this embodiment, in order to give priority to the sound with a small note number and to make it output with a software sound source, in step S313, the sound with a large note number is output with the hardware sound source. If it is desired to give priority to the sound with a large note number and output it by the software sound source, it may be determined whether or not the note number is small in step S313. By this determination processing, a sound with a small note number is output by the hardware sound source.

  In step S314, the “N + 1” -th record is determined as a switching instrument candidate. The determined record of the switching instrument candidate is temporarily stored in a predetermined storage area in the RAM of the control unit 12.

  In step S315, “1” is incremented to the value of “N”. Specifically, a value obtained by adding 1 to the “N” value is temporarily stored in the RAM as a new “N” value.

[Performance processing]
Here, the performance processing operation and action of the music reproducing device 1 will be described with reference to the accompanying drawings. FIG. 7 is a flowchart showing a processing procedure of performance processing in the music reproducing device 1.

  In step S401, it is determined whether or not the output of the music selected in step S105 has been completed. If it is determined that the output of the music has been completed (step S401: YES), the performance process is terminated. If it is not determined that the output of the music has been completed (step S401: NO), step S402 is executed.

  In step S402, the MIDI data is analyzed as in step S203. Specifically, the MIDI data is read out in a time series in which a sound included in the MIDI data temporarily stored in the RAM is output.

  In step S403, it is determined whether or not there is a note-on in the MIDI data read in step S402. When it is determined that there is a note-on (step S403: YES), step S404 is executed. If it is not determined that there is a note-on (step S403: NO), step S408 is executed.

  In step S404, the second table stored in the second table storage area 163 is referred to. Specifically, a record registered in the second table is referred to.

  In step S405, it is determined whether or not a record exists in the second table referred to in step S404. When it is determined that there is a record in the second table (step S405: YES), step S406 is executed. If it is not determined that a record exists in the second table (step S405: NO), step S407 is executed.

  In step S406, the record determined to exist in step S405 is transmitted to the hardware sound source 26. The control unit 12 and step S406 of the present embodiment are an example of a first control unit of the present invention. Moreover, step S406 of the present embodiment is an example of a first control step of the present invention. As a modification, in step S406, a record that exists in the second table may be transmitted to the hardware sound source 26, and a sound corresponding to a record other than the record that exists in the second table may be transmitted to the software sound source 27. .

  In step S407, the control unit 12 generates sound data based on the MIDI data. The generated sound data is transmitted to the software sound source 27. The control unit 12 and step S407 of this embodiment are an example of the second control means of the present invention. Moreover, step S407 of the present embodiment is an example of a second control step of the present invention.

  In step S408, MIDI data is transmitted to the hardware sound source and the software sound source. Based on the MIDI data, the control unit 12 generates sound data. The generated sound data is transmitted to the software sound source 27.

(Modification 1)
In this embodiment, if it is not determined in step S307 that the track level of the “N + 1” -th record is lower, the velocity is compared in step S309 after step S308 is executed. As a first modification of the present embodiment, steps S309 and S310 of the present embodiment may be executed instead of executing steps S306 and S307 of the present embodiment.

(Modification 2)
In this embodiment, if it is not determined in step S307 that the track level of the “N + 1” -th record is lower, the velocity is compared in step S309 after step S308 is executed. In the second modification, step S308 to step S310 may not be executed. In this case, a record to be a switching musical instrument candidate may be determined only by the processing of step S306 and step S307. Further, instead of executing steps S306 to S308, only step S309 and step S310 may be executed to determine a record as a switching instrument candidate.

(Modification 3)
Although this embodiment described the example which applied this invention to the karaoke system, it is not limited to this. The present invention can be applied to any music playback system or music playback apparatus that uses MIDI data.

(Modification 4)
In the present embodiment, the processing from step S304 to step S315 is repeatedly executed. As a result, the sound output from the hardware sound source 26 is determined in order from a record having a low track level or a low velocity. As a modification of the present embodiment, a record having the lowest track level or the lowest velocity may be determined as the sound output by the hardware sound source 26. A record having a track level smaller than a predetermined value may be determined as a sound output by the hardware sound source 26. A record whose velocity is smaller than a predetermined value may be determined as a sound output from the hardware sound source 26.

(Modification 5)
Note that the first table stored in the first table storage area 162 may be deleted after it is determined in step S202 of this embodiment that the music has ended (step S202: YES).

DESCRIPTION OF SYMBOLS 1 Music reproduction apparatus 2 Navi12 Control part 14 LAN interface part 16 Storage part 18 Operation part 20 Infrared receiving part 22 Operation processing part 25 MIDI sequencer 26 Hardware sound source 27 Software sound source 28 Mixing amplifier 29 Microphone control part 30 Speaker 32 Video RAM
36 Display unit 38 Video control unit 100 Internet 110 Access point 120 Router 161 MIDI data storage area 162 First table storage area 163 Second table storage area 164 Program storage area

Claims (7)

Storage means for storing MIDI data including performance signals;
A hardware sound source for generating sounds of a plurality of musical instruments based on the MIDI data stored in the storage means;
A software sound source for generating sound based on the MIDI data stored in the storage means;
First determining means for determining MIDI data to be reproduced from the MIDI data stored in the storage means;
Second determining means for determining a processing load when the MIDI data determined by the first determining means is reproduced by a software sound source;
Determining means for determining whether or not the processing load determined by the second determining means is greater than a predetermined processing load;
Third determination means for determining an instrument to be played back by the hardware sound source when the determination means determines that the load is greater than a predetermined processing load;
A first control unit that causes the instrument determined by the third determination unit to output the hardware sound source, and generates a sound other than the instrument determined by the third determination unit using the software sound source;
Second control means for causing the software sound source to output MIDI data determined by the first determination means when the determination means does not determine that the processing load is greater than the predetermined processing load;
A music playback device comprising:   The third determining means prioritizes an instrument having a small sound volume generated by the software sound source based on the MIDI data stored in the storage means, and determines the instrument to be played back by the hardware sound source. The music reproducing apparatus according to claim 1, wherein:   The third determining means plays back the musical instrument whose sound volume generated by the software sound source is smaller than a predetermined value or based on the MIDI data stored in the storage means by the hardware sound source. The music reproducing apparatus according to claim 2, wherein the music reproducing apparatus is determined as an instrument to be played.   The third determining means determines, as a sound volume generated by the software sound source, a musical instrument to be played back by the hardware sound source with priority given to a musical instrument having a weak velocity indicating sound intensity. The music reproducing device according to any one of claims 1 to 3.   5. The music reproducing device according to claim 4, wherein the third determining unit determines an instrument whose velocity is weaker or weaker than a predetermined value as an instrument to be reproduced by the hardware sound source. A first determination step of determining MIDI data to be reproduced from the MIDI data stored in the storage means for storing the MIDI data including the performance signal;
A second determination step for determining a processing load when the MIDI data determined in the first determination step is reproduced by a software sound source;
A determination step of determining whether or not the processing load determined by the second determination step is greater than a predetermined processing load;
A third determining step of determining a musical instrument to be played back by a hardware sound source that generates sounds of a plurality of musical instruments based on the MIDI data when it is determined that the predetermined processing load is greater than the predetermined processing load;
The instrument determined by the third determination step is output by the hardware sound source, and sounds other than the instrument determined by the third determination step are generated by a software sound source that generates sound based on MIDI data. A first control step;
A second control step of causing the software sound source to output the MIDI data determined in the first determination step when the determination step does not determine that the processing load is greater than the predetermined processing load;
Music playback method including A first determination step of determining MIDI data to be reproduced from the MIDI data stored in the storage means for storing the MIDI data including the performance signal;
A second determination step for determining a processing load when the MIDI data determined in the first determination step is reproduced by a software sound source;
A determination step of determining whether or not the processing load determined by the second determination step is greater than a predetermined processing load;
A third determining step of determining a musical instrument to be played back by a hardware sound source that generates sounds of a plurality of musical instruments based on the MIDI data when it is determined that the predetermined processing load is greater than the predetermined processing load;
The instrument determined by the third determination step is output by the hardware sound source, and sounds other than the instrument determined by the third determination step are generated by a software sound source that generates sound based on MIDI data. A first control step;
A second control step of causing the software sound source to output the MIDI data determined in the first determination step when the determination step does not determine that the processing load is greater than the predetermined processing load;
A program that causes a computer to execute.