Electronic musical instrument, control method of electronic musical instrument and program

Abstract

To provide an electronic musical instrument a control method of the electronic musical instrument and a program which can appropriately suppress consumption of power.SOLUTION: A control method of an electronic musical instrument comprises the steps of: determining an analysis object of a use state by using residual amount data of a battery acquired in a step S301 and priority data acquired in a step S302 (step S303); comparing use states of respective members indicated by use state analysis data acquired in a step S305 with power saving conditions indicated by power saving condition data acquired in a step S304 to determine whether or not the power saving condition is established for each of the plurality of members in accordance with a function being the analysis object of the use state (step S306); identifying each whose power saving condition is established, of the members (step S307); and performing power saving control on the identified members (step S308).SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to an electronic musical instrument, a control method for an electronic musical instrument, and a program. [Background technology]

[0002] Battery-powered electronic musical instruments are known. For example, Patent Document 1 discloses an electronic musical instrument that reduces power consumption by dividing the inside of the electronic musical instrument into multiple blocks and gradually stopping the operation of each block as the battery voltage drops. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 06-167969 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, even if a function is frequently used by the user, the power supply is stopped depending on the remaining battery power, which may reduce user convenience.

[0005] The present invention has been made in view of the above circumstances, and has as its object to provide an electronic musical instrument, a control method for an electronic musical instrument, and a program that can appropriately reduce power consumption. [Means for solving the problem]

[0006] In order to achieve the above object, the electronic musical instrument according to the present invention comprises: a battery for supplying power; a control unit that determines at least one function from among a plurality of functions according to a remaining amount of the battery, and controls at least one component that satisfies a predetermined condition among a plurality of components corresponding to the at least one determined function to a power saving state; Equipped with. [Effects of the Invention]

[0007] According to the present invention, it is possible to appropriately reduce power consumption so as to improve user convenience. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of the configuration of an electronic musical instrument according to an embodiment. [Figure 2] FIG. 2 is a diagram showing a power supply unit of the electronic musical instrument according to the embodiment. [Figure 3] FIG. 2 is a diagram illustrating an example of a configuration for realizing an audio output function according to an embodiment. [Figure 4] FIG. 10 is a diagram illustrating another example of a configuration that realizes an audio output function according to the embodiment. [Figure 5] FIG. 2 is a diagram illustrating an example of a configuration for realizing an audio input function according to an embodiment. [Figure 6] 10 is a flowchart illustrating an example of a power saving control process according to the embodiment. [Figure 7] 10 is a flowchart illustrating an example of a usage time measurement process according to the embodiment. [Figure 8] 10 is a flowchart illustrating an example of an analysis supply control process according to the embodiment. [Figure 9] 1A is a diagram showing an example of an analysis setting according to an embodiment, and FIG. 1B is a diagram showing an example of a power saving setting according to an embodiment. [Figure 10] 1A is a diagram showing an example of analysis of an audio output function according to an embodiment, FIG. 1B is a diagram showing an example of analysis of an audio input function according to an embodiment, and FIG. 1C is a diagram showing an example of analysis of an input operation function according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment) An embodiment of the present invention will now be described. An electronic musical instrument 100 according to this embodiment may be, for example, an electronic piano, an electronic organ, a synthesizer, or any other electronic musical instrument capable of outputting any audio. As shown in Fig. 1, the electronic musical instrument 100 comprises a control unit 111, a storage unit 112, a keyboard unit 113, an operation unit 114, and an audio processing unit 115. Some or all of these components are interconnected via an internal bus 121.

[0010] The control unit 111 can be configured to include a processor such as a CPU (Central Processing Unit). The processor may be configured to include an MPU (Micro-Processing Unit), an MCU (Micro-Controller Unit), or one or both of these instead of or in addition to a CPU. The control unit 111 executes various programs in the electronic musical instrument 100, enabling software-based information processing to be specifically realized using hardware. As an example, the CPU of the control unit 111 controls the entire electronic musical instrument 100, and executes keystrokes on the keyboard unit 113, switch detection and input operation on the operation unit 114, and other operations to control the sound system.

[0011] The storage unit 112 may be configured to include, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), a HDD (Hard Disk Drive), a semiconductor memory such as a flash memory, an optical disk recording / reading device, a magneto-optical disk recording / reading device, a combination of some or all of these, or any other storage device using electronic, magnetic, or optical methods, or some or all of these. Part or all of the storage unit 112 may be built into the electronic musical instrument 100 or may be configured to be externally attached. The storage unit 112 stores various programs executed by the electronic musical instrument 100, data used for various processes, and the like. For example, the RAM of the storage unit 112 temporarily stores musical tone waveform data, etc. The ROM of the storage unit 112 permanently stores system control processing programs, control data, and waveform data for generating musical tones.

[0012] The keyboard unit 113 is used by the user of the electronic musical instrument 100, who is the performer, to perform a musical performance. For example, when one of the black keys or white keys arranged on the keyboard unit 113 is pressed, a keystroke signal indicating the position and strength of the keystroke is transmitted to a CPU or the like included in the control unit 111. The CPU, which receives the keystroke signal in the control unit 111, controls the sound source unit 131 of the sound processing unit 115 and the like to enable musical sounds to be output from the speaker 133.

[0013] The operation unit 114 detects input operations by the user of the electronic musical instrument 100 and supplies a signal corresponding to the detection result to the control unit 111. For example, the operation unit 114 can be configured to include push button switches, wheels, levers, jog dials, indicators, touch panels, or any or all of these, and is used for switching various modes and inputting instructions. For example, the operation unit 114 can be configured to include performance controls such as a pitch bender, and a power-saving mode switch that accepts input operations corresponding to starting or ending a power-saving mode. The operation unit 114 can be configured to include LEDs (Light Emitting Diodes) corresponding to various input components to indicate their location and availability. In the operation unit 114, components capable of detecting input operations by the user are included in an input operation function unit that realizes the input operation function. Multiple components installed to realize the input operation function are also referred to as input operation components.

[0014] The audio processing unit 115 generates and processes digital musical sound signals, converts them into analog musical sound signals, amplifies the analog musical sound signals, and enables audio output of musical sounds corresponding to the analog musical sound signals. The audio processing unit 115 includes a sound source unit 131, a signal processing circuit 132, and a speaker 133. In addition, the audio processing unit 115 may include any input / output connector capable of inputting and outputting digital musical sound signals or analog musical sound signals, such as a headphone connector, a line output connector, a microphone connector, a line input connector, or any other connector.

[0015] In the audio processing unit 115, a configuration capable of outputting audio including musical tones corresponding to digital musical sound signals or analog musical sound signals is included in an audio output function unit that realizes an audio output function. In the audio processing unit 115, a configuration capable of inputting digital musical sound signals or analog musical sound signals corresponding to audio including musical tones is included in an audio input function unit that realizes an audio input function. Multiple components installed to realize the audio output function are also called audio output components. Multiple components installed to realize the audio input function are also called audio input components.

[0016] The tone generator 131 generates digital musical tone signals under control of a CPU or the like included in the control unit 111. For example, the digital musical tone signals may include two systems of signals corresponding to the left and right channels. The tone generator 131 may also include a tone generator memory. The tone generator memory digitally stores a plurality of musical tone signals corresponding to a plurality of timbres. One of these musical tone signals is selected and used for audio output.

[0017] The signal processing circuit 132 may be configured to include, for example, a DSP (Digital Signal Processor), a D / A (Digital-to-Analog) converter, an A / D (Analog-to-Digital) converter, and an amplifier. The DSP performs various processing operations on the digital musical sound signal generated by the sound source unit 131. The processing operations on the digital musical sound signal may include, for example, reverberation processing that adds a reverberation signal, delay processing that adds a reflected sound signal, and tremolo processing that adds fluctuation, or some or all of these. The D / A converter converts the digital musical sound signal into an analog musical sound signal. The analog musical sound signal converted by the D / A converter is supplied to an output amplifier. The output amplifier amplifies the analog musical sound signal and supplies it to a speaker 133 or the like. As a result, audio that becomes musical sound is output from the speaker 133. The A / D converter converts the analog musical sound signal into a digital musical sound signal. Analog musical sound signals input from a microphone connected to the microphone connector or a musical sound playback device connected to the line input connector are supplied to an input amplifier. The input amplifier amplifies the analog musical sound signals and supplies them to an A / D converter. The A / D converter converts the analog musical sound signals into digital musical sound signals. The digital musical sound signals converted by the A / D converter can be stored in the built-in memory of the storage unit 112 or the like.

[0018] In addition, electronic musical instrument 100 may be provided with a single or multiple components corresponding to each function to realize any desired functions, such as a display function, a communication function, an audio recording / playback function, or some or all of these functions. Electronic musical instrument 100 also includes a power supply unit capable of supplying power to drive each component.

[0019] In FIG. 2 , the power supply unit of the electronic musical instrument 100, shown together with the control unit 111, can include a battery 201, a reverse current prevention diode 202, a power adapter 203, a regulator 204, and a voltage detection circuit 205. The battery 201 supplies power to each component of the electronic musical instrument 100 when the power adapter 203 is not connected to a power source. The reverse current prevention diode 202 prevents reverse current flow toward the battery 201. The power adapter 203 supplies power to each component of the electronic musical instrument 100 when connected to a commercial power source. The regulator 204 generates a low-level power supply voltage VL using a high-level power supply voltage VH supplied from the battery 201 or the power adapter 203. The power supply voltage VL is used to power the CPU of the control unit 111, the D / A converter and A / D converter of the signal processing circuit 132, and other electronic circuits, including these. The voltage detection circuit 205 detects the high-level power supply voltage VH supplied by the battery 201 and transmits the result to the CPU of the control unit 111, etc. The control unit 111 can determine the remaining charge and charge level of the battery 201 based on the detection result by the voltage detection circuit 205.

[0020] In Figure 3, an example configuration that realizes the audio output function of the audio processing unit 115 shown together with the control unit 111 enables musical sounds to be output from main speakers 211L, 211R and sub-speakers 221L, 221R as multiple speakers included in the speaker 133.

[0021] Of the main speakers 211L, 211R and the sub-speakers 221L, 221R, the main speaker 211L and the sub-speaker 221L are capable of outputting sound for the left channel, and the main speaker 211R and the sub-speaker 221R are capable of outputting sound for the right channel. An amplifier unit 212 and a relay 213 are provided corresponding to the main speakers 211L, 211R. An amplifier unit 222 and a relay 223 are provided corresponding to the sub-speakers 221L, 221R. The amplifier units 212, 222 are elements that constitute an output amplifier. The amplifier unit 212 includes a left channel amplifier circuit 212A corresponding to the main speaker 211L, and a right channel amplifier circuit 212B corresponding to the main speaker 211R. The amplifier section 222 includes a left channel amplifier circuit 222A corresponding to the sub-speaker 221L, and a right channel amplifier circuit 222B corresponding to the sub-speaker 221R.

[0022] A high-level power supply voltage VH is supplied to the amplifier units 212 and 222 via relays 213 and 223, respectively. The relays 213 and 223 are power supply cutoff circuits that supply or cut off the high-level power supply voltage VH to the amplifier units 212 and 222, respectively. The control unit 111 controls the relays 213 and 223 using a CPU or the like to switch between supplying and cutting off power to the amplifier units 212 and 222. When powering off the amplifier unit 212, a mute signal MS01 is supplied to the amplifier unit 212 before switching the relay 213, thereby muting the audio output of the main speakers 211L and 211R at volume 0. Thereafter, a control signal CS01 to the relay 213 switches from the power supply state to the power cutoff state. When powering off the amplifier unit 222, a mute signal MS02 is supplied to the amplifier unit 222 before switching the relay 223, thereby muting the audio output of the sub-speakers 221L and 221R at volume 0. Thereafter, by switching from the power supply state to the cut-off state using the control signal CS02 to the relay 223, it is possible to prevent an impact noise when the power is cut off.

[0023] 4, another example of a configuration for realizing the audio output function of the audio processing unit 115 shown together with the control unit 111 is one in which audio or analog musical sound signals can be output from one or both of multiple output components other than the speaker 133, such as headphones 231 and a line output 241 including a line output connector. The headphones 231 can be connected to a headphone connector provided in the audio processing unit 115, and can output audio corresponding to the analog musical sound signal output from the electronic musical instrument 100. The line output 241 can transmit the analog musical sound signal output from the electronic musical instrument 100 to an external musical sound playback device using a cable or the like connected to the line output connector provided in the audio processing unit 115.

[0024] Corresponding to the headphones 231, there are provided an amplifier section with DAC function 232 and a relay 233. The amplifier section with DAC function 232 is one element constituting an amplifier for output, and includes a D / A converter 232A and an amplifier circuit 232B. Corresponding to the line output 241, there are provided an amplifier section with DAC function 242 and a relay 243. The amplifier section with DAC function 242 is one element constituting an amplifier for output, and includes a D / A converter 242A and an amplifier circuit 242B.

[0025] A low-level power supply voltage VL is supplied to the DAC function-equipped amplifier units 232 and 242 via relays 233 and 243, respectively. The relays 233 and 243 are power supply cutoff circuits that supply or cut off the low-level power supply voltage VL to the DAC function-equipped amplifier units 232 and 242, respectively. The control unit 111 controls the relays 233 and 243 using a CPU or the like to switch between supplying and cutting off power to the DAC function-equipped amplifier units 232 and 242. When power is cut off to the DAC function-equipped amplifier units 232 and 242, the mute signals MS11 and MS12 and the control signals CS11 and CS12 are used to set the audio output to a silent state with a volume of 0, and then the power is switched from a supply state to a cutoff state, as in the case of the amplifier units 212 and 222. This prevents an impact noise when power is cut off.

[0026] 5, an example configuration for realizing the audio input function of the audio processing unit 115 shown together with the control unit 111 allows analog musical sound signals to be input from one or both of multiple input components: a microphone input 251 including a microphone connector, and a line input 261 including a line input connector. The microphone input 251 may be configured to input an analog musical sound signal corresponding to audio to the electronic musical instrument 100 using a microphone or the like connected to the microphone connector of the audio processing unit 115. The line input 261 may be configured to input an analog musical sound signal transmitted from an external musical sound playback device to the electronic musical instrument 100 using a cable or the like connected to the line input connector of the audio processing unit 115.

[0027] Corresponding to microphone input 251, an ADC function-equipped amplifier section 252 and a relay 253 are provided. ADC function-equipped amplifier section 252 is one element constituting an input amplifier, and includes an A / D converter 252A and an amplifier circuit 252B. Corresponding to line input 261, an ADC function-equipped amplifier section 262 and a relay 263 are provided. ADC function-equipped amplifier section 262 is one element constituting an input amplifier, and includes an A / D converter 262A and an amplifier circuit 262B.

[0028] A low-level power supply voltage VL is supplied to the ADC function-equipped amplifier units 252 and 262 via relays 253 and 263, respectively. The relays 253 and 263 are power supply cutoff circuits that supply or cut off the low-level power supply voltage VL to the ADC function-equipped amplifier units 252 and 262, respectively. The control unit 111 controls the relays 253 and 263 using a CPU or the like to switch between supplying and cutting off power to the ADC function-equipped amplifier units 252 and 262. When power to the ADC function-equipped amplifier units 252 and 262 is cut off, the power is switched from a supply state to a cutoff state by control signals CS21 and CS22 sent to the relays 253 and 263, respectively.

[0029] As described above, the electronic musical instrument 100 includes a plurality of audio output components for implementing an audio output function, such as main speakers 211L, 211R and sub-speakers 221L, 221R included in the speaker 133, or, different from the speaker 133, headphones 231 connected to a headphone connector and line output 241 using a line output connector. The electronic musical instrument 100 also includes a plurality of audio input components for implementing an audio input function, such as microphone input 251 using a microphone connected to a microphone connector and line input 261 using a line input connector. In addition, the electronic musical instrument 100 includes a plurality of input operation components for implementing an input operation function, such as a pitch bender and various switches included in the operation unit 114.

[0030] In the electronic musical instrument 100, the control unit 111 sets a supply priority for supplying power to each of a plurality of different functions, such as an audio output function, an audio input function, and an input operation function, in accordance with the remaining charge of the battery 201. Then, at least one function is selected from the plurality of functions according to the set supply priority, and at least one component corresponding to the selected at least one function, which satisfies a predetermined condition, is controlled to a power-saving state. Note that the supply priority may be set as a default during manufacture or shipping of the electronic musical instrument 100 as an initial setting for the electronic musical instrument 100, and may be subsequently changed by a user of the electronic musical instrument 100 through input operations on the operation unit 114. For example, the default supply priority may be set so that the audio output function is the highest, the audio input function is the second highest, and the input operation function is the lowest. Such a supply priority is included in the priority set for each function.

[0031] In the electronic musical instrument 100, the control unit 111 sets an analysis priority for analyzing usage status for each of a plurality of different functions, such as an audio output function, an audio input function, and an input operation function, in accordance with the remaining charge of the battery 201. Thereafter, when a power-saving condition is met based on the usage status analyzed according to the set analysis priority, at least one component corresponding to each function is controlled to a power-saving state. The analysis priority may be set in the reverse order of the supply priority for supplying power. Like the supply priority, the analysis priority may be set as a default and may be changeable afterward by a user's input operation. For example, the default setting of the analysis priority may be such that the input operation function is highest, the audio input function is second highest, and the audio output function is lowest. Such an analysis priority is included in the priority set for each function. It is also possible to set only the supply priority without separately setting the analysis priority and the supply priority. In this case, the target for analysis of usage status is determined based on the supply priority set in accordance with the remaining charge of the battery 201.

[0032] The power-saving conditions are set in advance as conditions for controlling a power-saving state for each of multiple different functions, such as an audio output function, an audio input function, and an input operation function. Power-saving conditions may also be set for each of multiple components installed to realize each function. The power-saving conditions may be set as defaults during the manufacture or shipment of the electronic musical instrument 100, and may be changed later by a user of the electronic musical instrument 100 through input operations on the operation unit 114. Alternatively, the power-saving conditions may remain unchanged as default settings. For example, if the measurement time of usage is 10 hours, the first power-saving condition corresponding to the audio output function may be set to a usage rate of 5% or less, the second power-saving condition corresponding to the audio input function may be set to a usage time of 1 hour or less, and the third power-saving condition corresponding to the input operation function may be set to a usage count of 0. Alternatively, the power-saving conditions may be satisfied if the usage rate, usage time, or usage count of each of the multiple components is determined to be below an arbitrary threshold. At least one of the multiple components corresponding to each function that satisfies these power-saving conditions is controlled to a power-saving state. The power saving condition is also referred to as a predetermined threshold condition.

[0033] The data indicating the supply priority for supplying power and the data indicating the analysis priority for analyzing the usage status may be stored as priority data in a predetermined area of ​​the storage unit 112. The data indicating the power saving conditions may be stored as power saving condition data in a predetermined area of ​​the storage unit 112.

[0034] 6 can be executed by the CPU of the control unit 111 or the like in the electronic musical instrument 100 reading out a program stored in the storage unit 112. The power saving control process is a process for determining at least one function from among a plurality of functions, such as an input operation function implemented by the operation unit 114 and an audio output function or audio input function implemented by the audio processing unit 115, based on the usage analysis data stored in the storage unit 112 and depending on the remaining amount of the battery 201, and for controlling at least one component that satisfies a predetermined condition among a plurality of components corresponding to the at least one determined function to a power saving state. Here, the power saving control process corresponding to the audio output function and the audio input function will be particularly described.

[0035] In the power saving control process, the control unit 111 first sets the power saving mode (step S101). For example, the power saving mode is started based on the detection result of an input operation on a power saving mode switch included in the operation unit 114. If the power saving mode is not started, the power saving control process may be ended, or the control unit 111 may wait until the power saving mode is started.

[0036] After step S101, it is determined whether the electronic musical instrument 100 is currently being powered by a battery (step S102). For example, the control unit 111 may determine whether the electronic musical instrument 100 is currently being powered by a battery based on the detection result of the voltage detection circuit 205. If the electronic musical instrument 100 is not currently being powered by a battery (step S102; No), the control unit 111 waits and repeats step S102. If the power adaptor 203 is connected to a commercial power source, it is determined that the electronic musical instrument 100 is not currently being powered by a battery. In this situation, if the user of the electronic musical instrument 100 unplugs the power adaptor 203, the electronic musical instrument 100 enters the state of being powered by a battery 201, which supplies power. Alternatively, if the power adaptor 203 is not connected to a commercial power source and the user of the electronic musical instrument 100 turns on the power switch, the electronic musical instrument 100 enters the state of being powered by a battery 201, which supplies power.

[0037] If the device is powered by the battery (step S102; Yes), it is determined whether or not usage analysis data is stored (step S103). The presence or absence of usage analysis data can be determined using a data storage flag provided in the storage unit 112. Alternatively, the presence or absence of usage analysis data may be determined according to the presence or absence of a data file that stores the usage analysis data and the file size. If usage analysis data is not stored (step S103; No), a usage time measurement process, an example of which is shown in FIG. 7, is executed (step S104).

[0038] 7 is an example of a process for measuring the usage status of a functional unit, and is a process for measuring the usage time of a plurality of components corresponding to an audio output function and an audio input function. In this usage time measurement process, control unit 111 determines whether or not there is audio output (step S201). For example, control unit 111 may be able to determine whether or not there is audio output in accordance with the control state of audio processing unit 115. Alternatively, the presence or absence of audio output may be determined using a notification signal transmitted from audio processing unit 115 to control unit 111.

[0039] If there is no audio output (step S201; No), step S201 is repeated and the control unit 111 waits. If there is audio output (step S201; Yes), audio input and output are detected (step S202). For example, the control unit 111 detects the audio output system and audio input system currently in use in accordance with the control state of the audio processing unit 115. Alternatively, the currently used audio output system and audio input system may be made detectable by using a notification signal transmitted from the audio processing unit 115 to the control unit 111.

[0040] In response to the detection result in step S202, measurement of the usage time of each of the multiple components installed as audio output components and audio input components is started (step S203). For example, the storage unit 112 may store timer data that enables measurement of the usage time of each of the multiple installed components, and the timer data corresponding to the component currently being used may be periodically updated by the control unit 111. Alternatively, a timer circuit provided separately from the storage unit 112 may be used to enable measurement of the usage time of the component currently being used. In this way, the control unit 111 measures the usage status for each component that realizes each function. Note that the measurement of the usage status may be set to be performed, for example, by a user operation.

[0041] After step S203, it is determined whether or not switching between audio input and output has occurred (step S204). For example, the control unit 111 determines whether or not switching between the audio output function and the audio input function has occurred in accordance with the control state of the audio processing unit 115. Alternatively, it may be possible to determine whether or not switching between the audio output function and the audio input function has occurred using a notification signal transmitted from the audio processing unit 115 to the control unit 111.

[0042] If there is a switch in audio input / output (step S204; Yes), the measurement of usage time is temporarily stopped, and usage analysis data indicating the measurement results is stored and saved in storage unit 112 (step S205). In step S205, control unit 111 enables the measurement results of usage status to be recorded for each component. In this case, the process returns to step S201 and waits for the next audio output.

[0043] If there is no switching of audio input / output (step S204; No), it is determined whether or not the audio output has been stopped for a certain period of time (step S206). For example, the control unit 111 measures the time that has elapsed since the audio output was stopped, using timer data stored in the storage unit 112 or a timer circuit provided separately from the storage unit 112. Then, if the audio output remains stopped for a certain period of time, such as five minutes, it is determined that the audio output has been stopped for a certain period of time. Note that the certain period of time may be set in advance in accordance with the specifications of the electronic musical instrument 100, or may be set in response to an input operation on the operation unit 114 by the user of the electronic musical instrument 100.

[0044] If the audio output has not stopped for the specified time (step S206; No), the process returns to step S204, and measurement of the usage time continues. If the audio output has stopped for the specified time (step S206; Yes), measurement of the usage time is temporarily stopped, and usage analysis data indicating the measurement results is stored and saved in memory unit 112 (step S207). As in step S205, in step S207, control unit 111 enables recording of the measurement results of the usage status for each component. The usage analysis data includes information on the usage status of multiple components corresponding to at least one function, such as an audio output function and an audio input function.

[0045] After step S207, it is determined whether a storage completion condition is met (step S208). The storage completion condition may be a preset condition that is met when the cumulative storage time is equal to or greater than the analysis storage time, which is the time required to analyze the usage status. If the storage completion condition is not met (step S208; No), the process returns to step S201 and waits until the next audio output occurs. If the storage completion condition is met (step S208; Yes), the usage time measurement process ends.

[0046] The process of measuring the usage status of the functional unit may include a usage count measurement process in addition to the usage time measurement process shown in FIG. 7. The usage count measurement process is a process of measuring the number of uses of a plurality of components installed corresponding to the input operation functions. In this usage count measurement process, the control unit 111 determines whether a predetermined time set in advance as the situation measurement time has elapsed. The situation measurement time is the time from the start to the end of measurement of the number of uses, and may be measurable using timer data stored in the memory unit 112 or a timer circuit built into the control unit 111. The situation measurement time may be set to the same predetermined time as the analysis storage time.

[0047] If the situation measurement time has not elapsed, it is determined whether an input operation using any of the input operation members constituting the operation unit 114 has been detected. If no input operation is detected, the process returns to determining the situation measurement time and waits. If an input operation is detected, the number of uses is counted by updating the count data corresponding to that input operation. The count data is data for counting the number of uses corresponding to multiple input operation members, and it is sufficient that it can be stored in a predetermined area of ​​the memory unit 112. The count data is included in usage analysis data that indicates information on the usage of multiple members corresponding to at least one function, such as an input operation function.

[0048] When the situation measurement time has elapsed, the use count measurement process is terminated. Note that the use count measurement may be performed during the period from when the measurement of the use time is started in step S203 in the use time measurement process shown in Fig. 7, after the measurement of the use time is stopped in step S207, until the storage completion condition is met in step S208. In such use count measurement process, as in steps S205 and S207 in Fig. 7, the control unit 111 enables the measurement results of the usage situation to be recorded for each component.

[0049] In step S104 of Fig. 6, the usage time measurement process shown in Fig. 7 is executed, and then the usage count measurement process is executed together with this, followed by the analysis supply control process (step S105) an example of which is shown in Fig. 8. The analysis supply control process is a process for determining at least one function from among a plurality of functions according to the remaining charge of the battery 201, and for controlling at least one component that satisfies a predetermined condition from among a plurality of components corresponding to the at least one determined function to a power saving state.

[0050] 8, the control unit 111 acquires remaining capacity data of the battery 201 (step S301). The remaining capacity data of the battery 201 may be data indicating the remaining capacity of the battery 201 in accordance with the detection result by the voltage detection circuit 205. The remaining capacity data of the battery 201 may be directly supplied from the voltage detection circuit 205 to the control unit 111, or may be temporarily stored in a predetermined area of ​​the storage unit 112 and then made readable by the control unit 111.

[0051] Following step S301, priority data is acquired (step S302). In this case, the remaining amount data of the battery 201 acquired in step S301 and the priority data acquired in step S302 are used to determine the target of analysis of the usage status (step S303). For example, the control unit 111 identifies the current remaining amount of the battery 201 from the remaining amount data of the battery 201. Furthermore, the control unit 111 acquires a predetermined reference amount related to the remaining amount of the battery 201, such as a first reference amount set corresponding to the highest analysis priority and a second reference amount set corresponding to the second highest analysis priority, from data indicating the analysis priority included in the priority data. Then, if the remaining amount of the battery 201 is equal to or greater than the first reference amount, the control unit 111 determines that the function with the highest analysis priority will be the target of analysis of the usage status. If the remaining amount of the battery 201 is less than the first reference amount but equal to or greater than the second reference amount, the control unit 111 determines that the function with the highest analysis priority and the function with the second highest analysis priority will be the target of analysis of the usage status. When the remaining charge of the battery 201 is less than the second reference amount, the control unit 111 determines that the function with the highest analysis priority, the function with the second highest analysis priority, and the function with the third highest analysis priority will be the target of analysis of the usage status. In this way, the control unit 111 determines at least one function from among the multiple functions as the target of analysis of the usage status, depending on the remaining charge of the battery 201.

[0052] Following step S303, power-saving condition data is acquired (step S304). In this case, the control unit 111 may acquire power-saving condition data corresponding to functions to be analyzed for usage status, but may not acquire power-saving condition data corresponding to functions not to be analyzed for usage status. Furthermore, the control unit 111 analyzes the measurement results of functions to be analyzed for usage status, and acquires usage status analysis data (step S305). As an example, in analyzing the measurement results, the ratio of usage time for each component to the storage time for analysis may be calculated to determine the usage rate for each component. In this case, the control unit 111 acquires usage status analysis data corresponding to functions to be analyzed for usage status, but may not acquire usage status analysis data corresponding to functions not to be analyzed for usage status. In this way, the control unit 111 acquires usage status analysis data including information on usage statuses of multiple components corresponding to at least one function determined in step S303.

[0053] After step S305, it is determined whether the power saving condition is met (step S306). The control unit 111 compares the usage status of each component indicated by the usage status analysis data acquired in step S305 with the power saving condition indicated by the power saving condition data acquired in step S304, thereby determining whether the power saving condition is met for each of the multiple components installed corresponding to the function whose usage status is to be analyzed. In this way, the control unit 111 determines whether the usage status information included in the usage status analysis data acquired in step S305 meets the power saving condition as a predetermined threshold condition.

[0054] Using the determination result of step S306, the control unit 111 identifies components for which the power-saving conditions are satisfied (step S307). The control unit 111 designates, as the specified components, those components for which the power-saving conditions are satisfied among the multiple components installed corresponding to the functions to be analyzed for usage status. The control unit 111 then performs power-saving control of the specified components in step S307 (step S308) and terminates the power-saving control process. As a result, the components for which the power-saving conditions set for each function are satisfied are controlled to a power-saving state. The control unit 111 can control, to a power-saving state, at least one component for which the usage status information included in the usage status analysis data acquired in step S305 satisfies the power-saving conditions as a predetermined threshold condition. Furthermore, the control unit 111 can control, to a power-saving state, at least one component for which the usage status information included in the usage status analysis data acquired in step S305 satisfies the power-saving conditions as a predetermined threshold condition among the multiple components corresponding to at least one function determined in step S303 and which satisfies a predetermined condition.

[0055] The power-saving control in step S308 may cut off the supply of power to a specific component, or may reduce the supply of power to a specific component by changing the operating mode, such as the volume of the specific component. Any control may be made to a power-saving state in which power consumption is lower than in a normal state. For example, a mute signal MS01 may be supplied to the amplifier unit 212 installed corresponding to the main speakers 211L and 211R, and a control signal CS01 to the relay 213 may be used to switch from a power-supply state to a power-cut state. Alternatively, the mute signal MS01 may be supplied to the amplifier unit 212 to mute the audio output of the main speakers 211L and 211R to zero volume, while the control signal CS01 to the relay 213 may maintain the power supply state. Alternatively, a volume control signal different from the mute signal MS01 may be supplied to the amplifier unit 212 to reduce the audio output of the main speakers 211L and 211R to a low volume corresponding to the power-saving state.

[0056] 8, the analysis and control in steps S301 to S308 may be performed periodically in response to the passage of a preset analysis execution time, such as every hour. Alternatively, the analysis and control in steps S301 to S308 may be performed in response to the establishment of a predetermined analysis execution condition, such as the remaining charge of battery 201 being less than a preset condition value. The analysis and control process may then be terminated in response to the establishment of a preset control termination condition, such as when it is determined that the device is not running on battery power.

[0057] When power saving control is performed in step S308 of Fig. 8, information that allows the user to recognize the components that have been controlled to the power saving state may be output. For example, if electronic musical instrument 100 is equipped with a display unit using a liquid crystal display device or the like, an image indicating the components that have been controlled to the power saving state may be displayed on the display unit. Alternatively, if electronic musical instrument 100 is equipped with lighting units using LED lamps or the like that are arranged corresponding to the components, the power saving state may be made recognizable by turning off the lights or changing the lighting color of the parts corresponding to the components that have been controlled to the power saving state. These display units and lighting units function as notification units that notify the user of the components that have been controlled to the power saving state.

[0058] Next, a setting example for the electronic musical instrument 100 will be described with reference to Fig. 9. In the analysis setting example shown in Fig. 9(A), of the multiple functions provided by the electronic musical instrument 100, the audio output function has an analysis priority set to "low," the audio input function has an analysis priority set to "medium," and the input operation function has an analysis priority set to "high." In a power-saving setting example shown in Fig. 9(B), which is the opposite order to this, of the multiple functions provided by the electronic musical instrument 100, the audio output function has a supply priority set to "high," the audio input function has a supply priority set to "medium," and the input operation unit has a supply priority set to "low." In this way, priorities are set for each of the multiple functions provided by the electronic musical instrument 100.

[0059] In the analysis setting example of FIG. 9(A), when the remaining battery level of the battery 201 is 80% or more, only input operation functions with an analysis priority of "high" are determined to be "in need of usage analysis" and are the targets of usage analysis. That is, in step S303 of FIG. 8, when the remaining battery level is less than 80% but greater than or equal to 40%, input operation functions with an analysis priority of "high" and audio input functions with an analysis priority of "medium" are determined to be "in need of usage analysis" and are the targets of usage analysis. When the remaining battery level is less than 40%, input operation functions with an analysis priority of "high", audio input functions with an analysis priority of "medium", and audio output functions with an analysis priority of "low" are all determined to be "in need of usage analysis" and are the targets of usage analysis.

[0060] In the power-saving setting example of FIG. 9(B), when the remaining battery level is 80% or more, only the input operation function with a supply priority of "low" requires power-saving control. That is, based on the determination result of step S306 in FIG. 8, power-saving control is performed on the specific component in step S307 in step S308. When the remaining battery level is less than 80% and greater than or equal to 40%, the input operation function with a supply priority of "low" and the audio input function with a supply priority of "medium" require power-saving control. When the remaining battery level is less than 40%, all of the input operation function with a supply priority of "low", the audio input function with a supply priority of "medium", and the audio output function with a supply priority of "high" require power-saving control.

[0061] In this way, for example, the supply priorities are set as follows: a first priority is set for the audio output function, a second priority lower than the first priority is set for the audio input function, and a third priority lower than the second priority is set for the input operation function. In this case, when the remaining charge of the battery 201 is 80% or more as equal to or greater than a first reference amount, the usage status of the multiple input operation members corresponding to the input operation functions is analyzed. Also, when the remaining charge of the battery 201 is less than 80% as equal to or less than the first reference amount and is 40% or more as equal to or greater than a second reference amount, the usage status of the multiple input operation members and the multiple audio input members corresponding to the audio input functions is analyzed. Furthermore, when the remaining battery charge is less than 40% as equal to or less than a second reference amount, the usage status of the multiple input operation members, the multiple audio input members, and the multiple audio output members corresponding to the audio output functions is analyzed.

[0062] In the electronic musical instrument 100, a first power-saving condition is set corresponding to the audio output function, a second power-saving condition is set corresponding to the audio input function, and a third power-saving condition is set corresponding to the input operation function. In this case, an input operation member for which the third power-saving condition is met based on an analysis of the usage status when the remaining charge of the battery 201 is 80% or more (as equal to or greater than the first reference amount) is controlled to a power-saving state. Furthermore, an audio input member for which the second power-saving condition is met and an input operation member for which the third power-saving condition is met are controlled to a power-saving state based on an analysis of the usage status when the remaining charge of the battery 201 is less than 80% (as equal to or less than the first reference amount) and 40% (as equal to or greater than the second reference amount). Furthermore, an audio output member for which the first power-saving condition is met, an audio input member for which the second power-saving condition is met, and an input operation member for which the third power-saving condition is met are controlled to a power-saving state based on an analysis of the usage status when the remaining charge of the battery 201 is less than 40% (as equal to or less than the second reference amount). In this way, at least one function is determined from among the plurality of functions depending on the remaining charge of the battery 201, and at least one component among the plurality of components corresponding to the at least one determined function that satisfies the power saving condition as a predetermined threshold condition is controlled to a power saving state.

[0063] The usage analysis examples shown in Figure 10 include an analysis example for the audio output function in Figure 10(A), an analysis example for the audio input function in Figure 10(B), and an analysis example for the input operation function in Figure 10(C).

[0064] 10(A), the first power saving condition is set to a usage rate of 5% or less when the usage measurement time is 10 hours. In this way, the first power saving condition is set corresponding to one function, the audio output function.

[0065] In the usage time measurement process of Fig. 7, the usage time is measured for each of the multiple audio output components installed to realize the audio output function. As a result, the usage time of main speakers 211L and 211R is 5 hours, the usage time of sub-speakers 221L and 221R is 1 hour, the usage time of headphones 231 is 4 hours, and the usage time of line output 241 is 0 hours. In steps S306 and S307 of Fig. 8, a determination is made as to whether a first power-saving condition is met for each audio output component whose usage time has been measured, and the audio output component for which the first power-saving condition is met is identified. In this example, since it is determined that the first power-saving condition is met only for line output 241, power-saving control is performed in step S308 of Fig. 8.

[0066] In the analysis example of Fig. 10(B), the second power-saving condition is set to a usage time of less than 1 hour when the usage measurement time is 10 hours. In this way, the second power-saving condition is set corresponding to one function, the audio input function.

[0067] In the usage time measurement process of Figure 7, the usage time is measured for each of the multiple audio input components installed to realize the audio input function. As a result, the usage time of microphone input 251 is 2 hours, and the usage time of line input 261 is 0 hours. In steps S306 and S307 of Figure 8, a determination is made as to whether the second power saving condition is met for each audio input component whose usage time has been measured, and the audio input component for which the second power saving condition is met is identified. In this example, since it is determined that the second power saving condition is met only for line input 261, power saving control is performed in step S308 of Figure 8.

[0068] In the analysis example of Fig. 10(C), the third power saving condition is set to a value where the number of times of use is 0 when the measurement time of the usage status is 10 hours. In this way, the third power saving condition is set in correspondence with one function, the input operation function.

[0069] In the usage count measurement process, the usage count is measured for each of the input operation members provided to realize the input operation functions. As a result, the pitch bender has been used 0 times, the first switch has been used 10 times, the second switch has been used 5 times, and the third switch has been used 0 times. In steps S306 and S307 of FIG. 8, a determination is made as to whether the third power-saving condition is met for each input operation member whose usage count has been measured, and the input operation member for which the third power-saving condition is met is identified. In this example, if it is determined that the third power-saving condition is met for the pitch bender and the third switch, power-saving control is performed in step S308 of FIG. 8.

[0070] As described above, in the electronic musical instrument 100 according to this embodiment, a power-saving control process using the CPU of the control unit 111 determines at least one function from among a plurality of functions according to the remaining charge of the battery 201, and controls at least one component corresponding to the at least one determined function that satisfies a predetermined condition set as a power-saving condition to be in a power-saving state. In this way, the components corresponding to the determined function that satisfy the condition are controlled to be in a power-saving state. Therefore, depending on the function determination and the power-saving control conditions, functions that are frequently used by the user are less likely to be controlled to a power-saving state, and functions that are infrequently used by the user are more likely to be controlled to a power-saving state. Therefore, power consumption can be appropriately reduced to improve user convenience.

[0071] (Variation) The power saving conditions are not limited to those set for each function, and may be set differently for some components installed in plurality to achieve one function than for other components. As a specific example, among the audio output components installed in plurality to achieve an audio output function, the power saving conditions may be set so that the power saving conditions for the main speakers 211L, 211R and the sub-speakers 221L, 221R are met when their usage rates are 10% or less, and the power saving conditions for the headphones 231 and the line output 241 are met when their usage rates are 20% or less.

[0072] When only one component is installed to realize a specific function, a power saving condition is set for each function, and each component for which the power saving condition is met is controlled to the power saving state, so it is only necessary to determine whether or not to control the entire function to the power saving state. As a specific example, only one communication IC (Integrated Circuit) may be installed as a component to realize the communication function in electronic musical instrument 100. In this case, the success or failure of the power saving condition set for the communication function is determined for the communication IC, and the communication IC is controlled to the power saving state if the power saving condition is met, thereby controlling the entire communication function to the power saving state.

[0073] The determination of whether to subject the battery 201 to usage analysis based on the remaining battery capacity and analysis priority may be made in any manner as long as the determination can be made in accordance with an arbitrary remaining battery capacity. The determination of whether to determine whether a power saving condition is met based on the remaining battery capacity and supply priority may be made in any manner as long as the determination can be made in accordance with an arbitrary remaining battery capacity.

[0074] The usage time measurement process of FIG. 7, the number of uses measurement process corresponding to the input operation function, and any other usage status measurement process may be executable when the remaining battery level of the battery 201 is within a preset measurement tolerance range. For example, a range in which the remaining battery level is 50% or more may be preset as the measurement tolerance range. In this case, when the remaining battery level is within the measurement tolerance range, for example, 70%, the usage status measurement process is executed to measure the usage status of the functional unit. On the other hand, when the remaining battery level is outside the measurement tolerance range, for example, 30%, the usage status measurement process is restricted so that it is not executed. This prevents the usage status measurement process from being executed when the remaining battery level is low, thereby making it possible to appropriately suppress power consumption.

[0075] The processor of the control unit 111 that controls the electronic musical instrument 100 may be configured as a single-chip microprocessor or as any computer system. The electronic musical instrument 100 includes a battery 201, an operation unit 114 that can configure functional units that realize various functions, and an audio processing unit 115. Therefore, the processor of the control unit 111 can be configured as a computer that can control the electronic musical instrument 100 that includes the battery 201 and the functional units.

[0076] The present invention is not limited to electronic musical instruments 100 that can output sounds that become musical tones, but may also be applied to electronic devices that can be powered by a battery and have a functional unit that can realize any function.

[0077] The programs executable by the processor of control unit 111 are not limited to those stored in advance in memory unit 112, but may be stored and distributed on a non-transitory computer-readable recording medium such as a flexible disk, a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc), an MO (Magneto-Optical disc), a memory card, or a USB (Universal Serial Bus) memory, and by loading and installing the programs into a computer, a computer capable of executing each of the above-mentioned processes can be configured.

[0078] The program may be superimposed on a carrier wave and applied via a communication medium such as the Internet. For example, the program may be posted and distributed on a bulletin board system (BBS) on a communication network. Alternatively, the program and various data may be transmitted using any client-server system or P2P (Peer to Peer) network system. The program may then be started and executed under the control of an OS (Operating System) in the same way as other application programs, thereby enabling the above-mentioned processes to be performed.

[0079] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and the present invention includes the inventions described in the claims and their equivalents. [Explanation of symbols]

[0080] 100...electronic musical instrument, 111...control unit, 112...memory unit, 113...keyboard unit, 114...operation unit, 115...audio processing unit, 121...internal bus, 131...sound source unit, 132...signal processing circuit, 133...speaker, 201...battery, 202...backflow prevention diode, 203...power adapter, 204...regulator, 205...voltage detection circuit, 211L, 211R...main speaker, 212, 222...amplifier unit, 212A, 212B, 22 2A, 222B, 232B, 242B, 252B, 262B... Amplification circuit, 213, 223, 233, 243, 253, 263... Relay, 221L, 221R... Sub-speaker, 231... Headphone, 232, 242... Amplifier section with DAC function, 232A, 242A... D / A converter, 241... Line output, 251... Microphone input, 261... Line input, 252, 262... Amplifier section with ADC function, 252A, 262A... A / D converter

Claims

1. a battery for supplying power; a control unit that determines at least one function from among a plurality of functions according to a remaining amount of the battery, and controls at least one component that satisfies a predetermined condition among a plurality of components corresponding to the at least one determined function to a power saving state; An electronic musical instrument comprising:

2. the control unit acquires information on usage status of a plurality of components corresponding to the at least one determined function, and controls the at least one component for which the acquired information on usage status satisfies a predetermined threshold condition to the power saving state.

2. The electronic musical instrument according to claim 1.

3. The control unit determines that the predetermined threshold condition is satisfied when it determines that the usage rate, usage time, or usage count of each of the plurality of components is equal to or less than a predetermined threshold.

3. The electronic musical instrument according to claim 2.

4. the control unit controls the at least one component to a power saving state by transmitting a signal to cut off power supply to the component or to change an operation mode of the component; 2. The electronic musical instrument according to claim 1.

5. a notification unit that notifies the member that has been controlled to the power saving state, 2. The electronic musical instrument according to claim 1.

6. Power is supplied by a battery, determining at least one function from among a plurality of functions according to the remaining charge of the battery; controlling at least one component that satisfies a predetermined condition among the plurality of components corresponding to the at least one determined function to a power saving state; A method for controlling an electronic musical instrument.

7. On the computer, Power is supplied by a battery, determining at least one function from among a plurality of functions according to the remaining charge of the battery; controlling at least one component that satisfies a predetermined condition among the plurality of components corresponding to the at least one determined function to a power saving state; A program for executing a process.

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