JP2011123248A - Sound volume control device, musical sound control device, reprodcuction device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control dynamics of performance such as a musical piece, according to a direction to which a user directs an operator such as a baton. <P>SOLUTION: A sound volume control device sequentially detects a direction in the baton 2, to which the user directs the baton 2, to transmit it to a mobile phone 4, and the mobile phone 4 receives direction information transmitted by the baton 2. The mobile phone 4 controls the sound volume according to a change amount of the direction to which the baton 2 is directed, from a reference direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for controlling volume when reproducing sound data such as music.

  2. Description of the Related Art Conventionally, a technique has been proposed in which a motion of a user swinging a baton with a built-in acceleration sensor is detected and the tempo, volume, etc. of a performance by an automatic performance device or the like is controlled according to the motion (see Patent Document 1 below). ). This technology identifies the type of hand movement based on the angle at which the user's baton is swung down, the peak value of acceleration, etc., and controls the tempo and volume according to the user's hand movement. is there.

JP-A-8-339181

By the way, in the actual orchestra command, there is a case where the command stick is directed toward a certain instrument player and the command stick is shaken to give a performance expression individually to the part of the instrument. In the case of the above prior art, it is possible to control the tempo, volume, etc. by moving the baton up and down, but it is not possible to control the volume by pointing in a certain direction to conduct the actual orchestra It was.
The present invention provides a technique for controlling performance dynamics in accordance with the direction of movement of a baton by a user.

  The volume control device according to the present invention has an orientation detection means for detecting orientation and outputting orientation information, an operator that can be held and moved by an operator, and a reference orientation setting means for setting a reference orientation. Detection means for detecting a change in the orientation of the operating element with respect to the reference orientation based on the reference orientation set by the reference orientation setting means and the orientation information output by the orientation detection means, and a sound signal Volume control means provided on the reproduction path and controlling the volume of the sound signal in accordance with the amount of change detected by the detection means.

  According to the present invention, the operator can easily change the volume only by changing the orientation of the operator.

  The configuration of the volume control device further includes storage means for storing a volume condition defining a relationship between the angle amount and the volume, and the volume control means is based on the volume condition stored in the storage means. The sound volume defined as the angle amount corresponding to the change amount may be specified, and the sound signal may be controlled to be reproduced at the specified sound volume. According to this configuration, it is possible to uniquely specify the volume corresponding to the direction of the operation element.

  The musical tone control apparatus according to the present invention further includes a musical tone reproducing unit that reproduces a musical tone signal, an azimuth detecting unit that detects azimuth and outputs azimuth information, and a momentum detecting unit that detects momentum. Based on the directional information output by the azimuth detecting means, the reference azimuth setting means for setting the reference azimuth setting means, the reference azimuth setting means set by the reference azimuth setting means, Detection means for detecting a change amount of the azimuth of the operating element from the reference azimuth, and a volume for controlling a volume of a musical sound signal reproduced by the musical sound reproduction means according to the change amount detected by the detection means And a tempo control means for controlling the tempo of the musical sound signal reproduced by the musical sound reproducing means in accordance with the amount of exercise detected by the momentum detecting means. According to this configuration, it is possible to control the volume of the musical sound that is reproduced according to the direction of the operating element, and it is possible to change the tempo of the musical sound that is reproduced according to the amount of movement of the operating element.

  In addition, a playback device according to the present invention includes any one of the above-described volume control devices and playback means for playing back the sound signal. According to this configuration, the operator can control the volume of the sound reproduced by the reproduction device only by moving the direction of the operator so as to change.

  Further, the program according to the present invention detects the direction and outputs the direction information, and is connected to an operator that can be moved by being grasped or mounted by an operator, and outputs the input sound signal to the computer. An acquisition step for acquiring the azimuth information output by the child, a reference azimuth setting step for setting a reference azimuth, a reference azimuth set by the reference azimuth setting step, and the azimuth information acquired by the acquisition step. Based on a detection step of detecting a change amount of the direction of the operation element from the reference azimuth, and a volume control step of controlling the volume of the sound signal according to the change amount detected by the detection step. Let it run. According to this configuration, the volume of the reproduced sound signal can be easily changed simply by changing the direction of the operation element.

It is a figure which shows the structure of the volume control apparatus which concerns on Embodiment 1. FIG. It is a figure explaining the volume control in the volume control apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the external appearance of the baton which concerns on Embodiment 1. FIG. 1 is a block diagram of a volume control device according to a first embodiment. (A) is a figure showing an example of volume control information in Embodiment 1. (B) is a figure which shows the example of the music information in Embodiment 1. FIG. It is a figure explaining the volume control of Embodiment 1. FIG. (A) is a figure which shows the example of the azimuth | direction conversion table in Embodiment 1. FIG. (B) is a figure which shows the example of the default reference | standard azimuth | direction information in Embodiment 1. FIG. FIG. 5 is an operation flowchart illustrating an initial setting process in the first embodiment. FIG. 5 is an operation flowchart illustrating a volume control process in the first embodiment. It is a block diagram of the baton according to the second embodiment. It is a figure explaining the inside of the baton which concerns on Embodiment 2. FIG. (A) is a figure showing an example of volume ratio information in Embodiment 2. (B) is a figure which shows the example of the peak sound volume information in Embodiment 2. FIG. FIG. 10 is an operation flowchart illustrating volume control processing in the second embodiment. FIG. 10 is an operation flowchart illustrating volume level specifying processing according to the second embodiment. It is a figure explaining the volume control timing of a modification (4). (A) is a figure explaining the volume control of a modification (5). (B) is a figure explaining the volume control of a modification (6).

<Embodiment 1>
Hereinafter, a volume control apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings.
<Overview>
FIG. 1 shows an appearance of a volume control device according to this embodiment. As shown in FIG. 1, the volume control device 1 is composed of a baton 2 and a mobile phone 4 which are operators, and the baton 2 and the mobile phone 4 are connected by short-range wireless communication such as Bluetooth (registered trademark). It is connected. The mobile phone 4 has a normal mode in which music to be played is played at a preset volume, and a volume control mode in which the volume of the music being played is controlled according to the direction in which the user swings the baton 2. Each mode is switched according to the user's setting operation. FIG. 2 is a diagram illustrating an example of volume control in the volume control mode. In FIG. 2, it is assumed that the baton 2 is held horizontally in a plane A perpendicular to the gravity direction G. In this example, the P0 direction to which the tip 2a of the baton 2 is directed indicates the reference azimuth, that is, the azimuth serving as a reference when performing volume control according to the azimuth in which the baton 2 is swung. When setting the volume control mode, the user can set the reference direction by directing the baton 2 in the desired horizontal direction. In the case of FIG. 2, the volume Vp0 is directed when the baton 2 is directed in the P0 direction of the reference azimuth, the volume Vp1 is directed toward the azimuth angle 90 ° from the reference azimuth in the arrow B direction, and the azimuth angle 180 ° is directed from the reference azimuth in the arrow B direction. The volume changes to the volume Vp2. Thus, the volume control device can change the volume according to the azimuth angle of the baton 2 with respect to the reference azimuth. Details of the volume control device 1 will be described below.

<Configuration>
First, the configuration of the baton 2 will be described. FIG. 3 shows the appearance of the baton 2. As shown in the figure, the command rod 2 is composed of a tip portion 2a and a handle portion 2b held by the user. The tip portion 2a has a bar shape thinner than the handle portion 2b, and the handle portion 2b. Has a substantially rectangular parallelepiped shape. On the upper surface of the handle portion 2b, there are provided a power switch 2c for switching on / off the power of the baton 2 and a reference azimuth setting switch 2d for instructing setting of a reference azimuth to be described later. A geomagnetic sensor 2e is provided inside the portion 2b. The tip 2a of the baton 2 indicates the azimuth that the user wants to set as the reference azimuth and the azimuth where the volume is to be changed.

  FIG. 4 is a block diagram of the volume control device 1. The baton 2 includes an operation unit 21, an orientation detection unit 22, a communication unit 23, and a control unit 24. The operation unit 21 includes a power switch 2c and a reference orientation setting switch 2d, and accepts a switch operation from the user. This reference azimuth setting switch 2d is a switch for setting the horizontal azimuth in which the baton 2 is held by the user as the reference azimuth when the volume control mode is set, and when the reference azimuth setting switch 2d is pressed. Information indicating that a reference azimuth setting operation has been performed is output.

  The azimuth detecting unit 22 includes the geomagnetic sensor 2e. The geomagnetic sensor 2e is a triaxial geomagnetic sensor. As shown in FIG. 3, the longitudinal direction of the baton 2 is defined as the y-axis, the vertical direction when the surface on which the reference setting switch 2d is provided is defined as the z-axis, and the left-right direction is defined as the x-axis. The local magnetic sensors are provided such that the axes of the local magnetic sensors are in the xyz axis direction orthogonal to each other. The local magnetic sensor is composed of an element whose resistance value changes in accordance with a change in geomagnetism. By flowing a constant bias current through the local magnetic sensor, according to the direction in which the tip 2a of the conductor rod 2 is directed, The geomagnetism in each axial direction of the xyz axis is detected, and a voltage value g (gx, gy, gz) indicating a magnetic field obtained by the various magnetic sensors is output at regular intervals.

  The communication unit 23 is a Bluetooth (registered trademark) wireless communication interface. Under the control of the control unit 24, an ID number for identifying the commander 2 set in advance is included in the transmission data and transmitted to the mobile phone 4. Then, communication is established by authentication of the ID number by the mobile phone 4 and data communication with the mobile phone 4 is performed.

  The control unit 24 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory) memory. The CPU controls each unit connected to the control unit 24 by executing a control program stored in the ROM using the RAM as a working area. Specifically, the voltage value indicating the magnetic field output by the azimuth detection unit 22 when the reference azimuth setting operation is performed is transmitted as reference azimuth information to the mobile phone 4 via the communication unit 23. Moreover, the voltage value which shows the magnetic field sequentially output by the direction detection part 22 after reference | standard azimuth | direction setting operation is transmitted to the mobile telephone 4 through the communication part 23 as azimuth | direction information for every fixed time.

Next, the configuration of the mobile phone 4 will be described. The mobile phone 4 includes an operation unit 40, a communication unit 41, a sound source 42, an amplifier 43, a speaker 44, a storage unit 45, a microphone 46, a telephone communication unit 47, a display unit 48, and a control unit 49.
The operation unit 40 has various operation buttons such as numeric keys, direction keys, and execution keys, receives button operations from the user, and sends information indicating the received button operations to the control unit 49. The communication unit 41 is a Bluetooth (registered trademark) wireless communication interface. Under the control of the control unit 49, the communication unit 41 authenticates the ID number transmitted from the command bar 2 and establishes a connection with the command bar 2. Data communication with 2 is performed.

  The sound source 42 is a sound source circuit that reproduces music data such as MIDI (Musical Instruments Digital Interface), and converts music data stored in a storage unit 45 (to be described later) into an audio signal in the audio band for reproduction. The amplifier 43 adjusts the amplitude of voice data of conversation data and music data in telephone communication under the control of the control unit 49. The speaker 44 generates a sound signal adjusted by the amplifier 43.

  The storage unit 45 stores user data set and generated by the user, music data, and volume control information as a volume condition referred to in the volume control mode. Here, volume control information and music data will be described. FIG. 5A shows the configuration and data example of the volume control information. In the volume control information 100, a predetermined angle amount, that is, an azimuth angle from a certain reference azimuth and a volume level corresponding to each azimuth angle are associated. In this example, as shown in FIG. 6, the sound volume level is 0 between the azimuth angles 0 to 60 ° from the reference azimuth, the sound volume level 64 and the azimuth angle 120 ° are exceeded from the azimuth angle 60 ° to 120 °. The volume is controlled step by step so that the volume level is 128 until 180 °. The numerical value (angle) of each azimuth is defined clockwise with a certain predetermined azimuth as a reference. In the present embodiment, the azimuth angle in the clockwise direction from a certain reference azimuth is controlled from 0 to 180 °, and when the baton 2 is directed between the azimuth angles of 180 ° to 360 °, 180 ° to The sound volume is controlled so as to maintain the sound volume level that was controlled immediately before being directed between 360 °, but the azimuth angle and the sound volume level from 180 ° to 360 ° may be set. Further, when the sound volume level is 0, the sound pressure is controlled to 0 decibels, but it may be controlled so as to temporarily stop the output of the audio signal.

  FIG. 5B shows a configuration of music information and an example of data. In the music information 110, music names and music data identification information corresponding to the music names are stored in association with each other. The music information 110 is read by the sound source 42 when the user gives an instruction to reproduce the music.

  Returning to the description of FIG. The microphone 46 collects the voice of the user or the like during telephone communication. The telephone communication unit 47 wirelessly connects to a base station of a mobile communication network via an antenna (not shown), A / D-converts and transmits a voice signal picked up by the microphone 46, and passes through the base station. Then, the audio signal is received and the D / A converted audio signal is output from the speaker 44.

  The display unit 48 includes a display such as a liquid crystal display, and displays a standby image, a menu image, user data, and the like. The control unit 49 includes a CPU and ROM and RAM memories. The CPU controls each unit connected to the control unit 49 by executing a control program stored in the ROM using the RAM as a working area. In addition to the control program, the ROM stores an orientation conversion table 120 shown in FIG. 7A and default orientation information 130 shown in FIG.

In FIG. 7A, this azimuth conversion table 120 stores a voltage value G indicating each magnetic field in each axial direction of the geomagnetic sensor 2e and information indicating an absolute azimuth corresponding to each voltage value in advance. The azimuth conversion table 120 is referenced when obtaining the reference azimuth information of the baton 2 and the azimuth corresponding to the azimuth information. As information indicating the absolute azimuth, the absolute azimuth and its angle (azimuth angle) may be stored.
7B stores the absolute azimuth set as the default reference azimuth, and when the volume control mode is set, this absolute azimuth is set as the default reference azimuth. Read out.
The control unit 49 reproduces the music in accordance with the music playback instruction from the user, and the reference azimuth information and direction received from the baton 2 by the communication unit 41 in the volume control mode. Based on the information, the volume level is controlled according to the azimuth angle at which the baton 2 is directed with respect to the reference azimuth.

<Operation>
Hereinafter, the operation of the above-described volume control device 1 will be described. FIG. 8 shows an operation flow of an initial setting process before reproducing music data. In the following explanation, the power of the baton 2 is set to ON and the detection of the terrestrial magnetism is started by the azimuth detecting unit 22, and the mobile phone 4 is operated by an operation button to which a function for instructing music playback is assigned by the user. Then, it is assumed that a selection screen for selecting a song name of the song information 110 stored in the storage unit 45 is displayed on the display unit 48.

  When the user operates the operation unit 40 of the mobile phone 4 and performs an operation of selecting a desired music name from the music names displayed on the display unit 48 (step S10: YES), the control unit 49 of the mobile phone 4 Then, a mode selection screen for accepting an operation for selecting either the normal mode or the volume control mode is displayed on the display unit 48, and the mode selection operation is accepted from the user (step S11). In step S11, when the user selects the volume control mode via the operation unit 40 (step S11: YES), the control unit 49 sets the absolute reference “north” in the default reference orientation information 130 stored in the ROM as the default reference. It reads out as an azimuth | direction, writes in the predetermined area | region of RAM, starts the communication part 41, and waits (step S12).

  When the user depresses the reference orientation setting switch 2d of the operation unit 40 with the tip 2a of the command rod 2 facing in a certain direction, for example, south (step S20: YES), the control unit 24 of the command rod 2 is The information indicating that the reference azimuth setting operation output from the reference azimuth setting switch 2d has been performed, the voltage value indicating the magnetic field detected by the azimuth detecting unit 22, and the ID set on the baton 2 Reference azimuth information including the number is transmitted to the mobile phone 4 via the communication unit 23 (step S21).

  When the control unit 49 of the mobile phone 4 receives the reference direction information including the ID number transmitted from the baton 2 via the communication unit 41 (step S13), the control unit 49 outputs from the local magnetic sensors included in the received reference direction information. The reference direction “south” is specified with reference to the voltage value indicating the magnetic field and the direction conversion table 120 stored in the ROM (step S14). The control unit 49 replaces the default reference direction “north” stored in the predetermined area of the RAM with “south” indicating the absolute direction of the specified reference direction (step S15).

In step S10 of the mobile phone 4, if the user does not perform an operation of selecting a song name (step S10: NO), the control unit 49 ends the initial setting process after a predetermined time has elapsed. In Step S11, when the user selects the normal mode (Step S11: NO), the control unit 49 ends the initial setting process. When the initial setting process is finished, the music data of the music name selected by the user is read from the storage unit 45 by the sound source 42 and the audio signal of the music data is reproduced, and the sound volume set in advance by the user is obtained. An audio signal is output from the speaker 44.
If the user does not press the reference azimuth setting switch 2d in step S20 of the baton 2 (step S20: NO), the control unit 24 ends the reference azimuth setting process after a predetermined time has elapsed.

  Next, the operation at the time of reproducing music data will be described. FIG. 9 is an operation flow of a volume control process during reproduction of music data. The control unit 49 of the mobile phone 4 reads the music data selected by the user in step S10 of FIG. 8 from the storage unit 45 by the sound source 42 and reproduces the audio signal of the music data (step S30).

  Then, during playback of the music data after setting the reference orientation, for example, when the user moves the tip 2a of the conductor rod 2 from the reference orientation “south” toward the “west” direction, the orientation detection of the conductor rod 2 is detected. The unit 22 detects the geomagnetism at each position of the baton 2 that changes according to the user's action, and sequentially outputs the detected voltage value (step S40). The control unit 24 of the baton 2 transmits the voltage value indicating the magnetic field output by the azimuth detecting unit 22 to the mobile phone 4 as the azimuth information of the baton 2 to the mobile phone 4 at regular intervals (step S41). .

  The control unit 49 of the mobile phone 4 sequentially receives the azimuth information transmitted from the baton 2 via the communication unit 41 (step S31), and receives the azimuth conversion table 120 stored in the ROM. The direction corresponding to the voltage value indicating the magnetic field of each magnetic sensor included in the orientation information is specified. Then, the reference azimuth information is read from a predetermined area of the RAM, and the azimuth angle of the specified azimuth with respect to the reference azimuth is obtained as the change amount of the change azimuth according to the angle of the specified azimuth with the reference azimuth (step S32).

  Subsequently, the control unit 49 reads the volume control information 100 from the storage unit 45 (step S33), and specifies the volume level corresponding to the azimuth obtained in step S32 (step S34). The control unit 49 amplifies the audio signal being reproduced by the amplifier 43 so as to achieve the volume level specified in step S34, and outputs it from the speaker 44 (step S35). In this case, while the front end 2a of the baton 2 is directed between the reference azimuth “south (= 0 °)” and the azimuth angle 60 °, the audio signal of the music data being reproduced with the volume level set to 0 A voice signal is output at a volume level 64 from immediately after exceeding the azimuth angle of 60 ° to “west (= 90 °)” where the baton 2 is directed.

  Moreover, the control part 24 of the baton 2 repeats the process from step S40 to step S41 until the power of the baton 2 is turned off by the user (step S42: NO), and the power is turned off. (Step S42: YES), end information indicating the end of the volume control process is transmitted to the mobile phone 4 via the communication unit 23 (step S43), and the azimuth detection process ends.

  Further, the control unit 49 of the mobile phone 4 repeats the processing from step S31 to step S35 until the user performs a mode canceling operation for canceling the volume control mode or until the end information is received from the baton 2. (Step S36: NO), and when the mode release operation is performed or when the end information is received (step S36: YES), the volume control process is ended.

  In the first embodiment described above, the volume of the music being played on the mobile phone 4 can be controlled in accordance with the orientation in which the tip 2a of the baton 2 is directed with respect to the reference orientation set by the user. Therefore, for example, the user can change the dynamics of the performance portion only by directing the tip 2a of the baton 2 in a direction where the volume is higher or lower than the current volume when playing a portion of the music piece. , You can feel the sense of the conductor.

<Embodiment 2>
Next, a volume control apparatus according to Embodiment 2 of the present invention will be described. The volume control device 1 according to the first embodiment described above is described as including the bearing detection unit 22 in the baton 2 and controlling the volume of the sound emitted from the mobile phone 4 in accordance with the direction to which the baton 2 is directed. . In this embodiment, in addition to the configuration of the first embodiment, the baton 2 is provided with an acceleration detection unit 25 as a momentum detecting means, and the mobile phone 4 according to the acceleration and direction when the baton 2 is swung. Control the volume at. Note that the volume control device in the present embodiment uses the same volume control device 1 as in the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and different parts from the first embodiment are described. To do.

<Configuration>
FIG. 10 is a block diagram of the baton 2 according to the present embodiment. As described above, the baton 2 according to the present embodiment includes the acceleration detection unit 25 as a momentum detection means in addition to the configuration of the first embodiment. The acceleration detection unit 25 includes an acceleration sensor 2f shown in FIG. The acceleration sensor 2f includes three acceleration sensors that detect accelerations in the three axial directions, respectively, and the axes of the acceleration sensors are provided so as to be in the orthogonal xyz axis directions shown in FIG. Yes. Each acceleration sensor detects each acceleration in the xyz-axis direction, and sequentially outputs acceleration information α (αx, αy, αz) indicating the detected acceleration value.
In this embodiment, an example of using an acceleration sensor as the momentum detection means will be described. However, a speed sensor, a displacement sensor, a pressure sensor, a strain sensor, a tilt (angle) sensor, an angular velocity sensor, an angular acceleration sensor, an impact sensor, etc. Various momentum sensors may be used. The momentum detection means described above may be a sensor that detects the momentum in the three-axis direction, or may be a sensor that detects the momentum in two axes (x-axis and y-axis) or one axis.

  In the present embodiment, the control unit 24 of the baton 2 transmits the acceleration information α output by the acceleration detection unit 25 to the mobile phone 4 at regular intervals in addition to the direction information detected by the direction detection unit 22. .

  The configuration of the mobile phone in the present embodiment is the same as that of the mobile phone 4 of the first embodiment described in FIG. Hereinafter, functions different from those of the first embodiment will be described. The control part 49 performs the following process while performing the volume level specific process according to the azimuth | direction to which the baton 2 was pointed similarly to Embodiment 1. FIG.

  The control unit 49 sequentially stores the values of acceleration vectors (hereinafter referred to as acceleration data) based on the components of the acceleration information received from the baton 2 in time series in the RAM, and each of the predetermined time stored in the RAM. The acceleration peak at which the acceleration data reaches a maximum value is detected and the timing of the acceleration peak is specified. At the acceleration peak timing, the acceleration data at the timing (hereinafter referred to as acceleration peak value) and the volume level corresponding to the azimuth angle The volume of the music being played is controlled so that In the present embodiment, as shown in FIG. 12A, a volume level corresponding to the acceleration peak value (hereinafter referred to as peak value volume) and a volume level corresponding to the azimuth angle (hereinafter referred to as azimuth volume) are used. Volume ratio information 200 defined to control the volume at a combination of 7 to 3 is stored in the ROM. Note that the ratio of combining the peak value volume and the azimuth volume can be arbitrarily set or changed by the user.

  In addition to the volume control information 100 described above, the storage unit 45 of the mobile phone 4 stores peak volume information 210 in which the peak value volume shown in FIG. As shown in the figure, the peak sound volume information 210 stores a peak value condition indicating a threshold range of the acceleration peak value (AP) and a sound volume level corresponding to each peak value condition in association with each other. In the present embodiment, the volume level is set to increase as the acceleration peak value increases.

<Operation>
Hereinafter, the operation of the volume control device 1 according to the present embodiment will be described. FIG. 13 is an operation flow showing a volume control process during reproduction of music data. Hereinafter, the operation different from that of the first embodiment will be mainly described. Similar to the first embodiment, the mobile phone 4 starts to reproduce the music data selected by the user (step S30).

  As in the first embodiment, when the user swings and moves the tip 2a of the baton 2 from the reference direction, the azimuth detecting unit 22 detects the geomagnetism in the baton 2 that changes according to the user's operation, and the acceleration. The detection unit 25 detects the acceleration by which the baton 2 is moved (step S400). The control unit 24 of the baton 2 communicates the ID number of the baton 2, the azimuth information indicating the voltage value output from the azimuth detection unit 22, and the acceleration information indicating the acceleration output from the acceleration detection unit 25. Then, the data is transmitted to the mobile phone 4 at regular intervals via the network 23 (step S410).

  The control unit 49 of the mobile phone 4 receives the azimuth information and the acceleration information including the ID number of the baton 2 transmitted from the baton 2 via the communication unit 41 (step S310), and receives the received azimuth information and acceleration. Using the information, a volume level specifying process for specifying the volume level is performed (step S320).

  Here, the sound volume level specifying process in step S320 will be described with reference to the operation flow of FIG. First, the control unit 49 performs each process of steps S32 to S34 on the azimuth information received in step S310, as in the first embodiment, and specifies the azimuth volume level corresponding to the azimuth to which the baton 2 is directed. Then, the specified azimuth volume level information is stored in the RAM (steps S32 to S34).

  Then, the control unit 49 performs a process of removing the gravitational acceleration component from the acceleration component of each axis included in each acceleration information received in step S310 and removing the high frequency component, and then the process. The later acceleration components (αx ′, αy ′, αz ′) are synthesized to obtain an acceleration vector, and the acceleration data α ′ indicating the acceleration vector value and the acceleration components (αx ′, αy ′, αz ′) are Store in RAM in series. Based on the acceleration data α ′ of the baton 2 stored in the RAM, an acceleration peak at which the acceleration becomes maximum is detected (step S51). Specifically, the time at which the slope (differential value) at each time changes from positive to negative is specified on a curve representing the change over time of the absolute value of the acceleration data α ′ at each time.

  When the acceleration peak is detected (step S51: YES), the control unit 49 reads the peak volume information 210 from the storage unit 45 (step S52), and peaks the volume level corresponding to the peak value condition including the acceleration peak value. The value volume level is specified (step S53).

  The control unit 49 reads the azimuth volume level information stored in the RAM, and the peak value volume level and the azimuth volume level specified in step S53 are defined by the volume ratio information 200 stored in the ROM. The volume level obtained by multiplying the respective ratios and adding the multiplication results is specified as the reproduction volume level at the acceleration peak timing (step S54).

  In step S51, when the control unit 49 cannot detect an acceleration peak based on the received acceleration information (step S51: NO), the volume level corresponding to the direction specified in step S34 is set as in the first embodiment. The playback volume level is specified (step S55).

  Returning to FIG. 13, the control unit 49 amplifies the audio signal of the music data being reproduced by the sound source 42 by the amplifier 43 so as to be the reproduction volume level specified in step S320, and outputs it from the speaker 44 (step S35). .

  In the second embodiment, the volume can be controlled according to a predetermined ratio based on the peak value and direction of acceleration when the baton 2 is swung. Therefore, in addition to the direction in which the conductor 2 is swung, the volume can be controlled in accordance with the strength with which the conductor 2 is swung, and the performance dynamics can be controlled as if the performance was actually conducted.

<Modification>
Although the embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and can be implemented in various other forms. For example, the above-described embodiment may be modified as follows to implement the present invention, or may be implemented in combination with each modification. Hereinafter, modifications of the embodiment according to the present invention will be described.

(1) In the first embodiment described above, the volume level corresponding to each azimuth angle is defined in advance in the volume control information 100, but the volume level relative to the reference azimuth (hereinafter referred to as the reference azimuth volume) is used. It may be set and the reference azimuth volume may be adjusted according to the azimuth corresponding to the azimuth indicated by the baton 2. In this case, the user may arbitrarily set the reference azimuth volume and the adjustment amount for adjusting the reference azimuth volume, or may be configured to be stored in advance. For example, when the user arbitrarily sets, the reference azimuth volume value is set in the mobile phone 4 when the reference azimuth setting operation is performed, and the reference azimuth volume adjustment amount is set for each azimuth angle.

(2) In Embodiment 1 described above, the azimuth specified during the reference azimuth setting operation is set as the reference azimuth. However, the azimuth obtained by shifting the specified azimuth by a predetermined angle is set as the reference azimuth. You may comprise as follows. In this case, the predetermined angle value may be stored in advance in a ROM or the like, or the user may arbitrarily set it.

(3) In Embodiment 1 described above, the reference direction setting operation is performed on the baton 2, but the reference direction setting operation may be performed on the mobile phone 4. In this case, in the mobile phone 4, a selection screen for accepting a selection input for the reference orientation may be displayed on the display unit 48, and the orientation selected by the user may be set as the reference orientation. If provided, the reference orientation may be set by directing the mobile phone 4 in a desired direction and the user pressing an operation button pre-assigned with a reference orientation setting function.
The embodiment and the above modification are examples in the case of receiving a reference azimuth setting instruction from a user. However, as an example in the case of not receiving a reference azimuth setting instruction from a user, a reference azimuth is set in the mobile phone 4 in advance. Alternatively, it may be configured such that when the power switch of the mobile phone 4 is turned on, the orientation to which the mobile phone 4 is directed is detected and the orientation is set as the reference orientation. .

(4) In the above-described first embodiment, it is described that the volume corresponding to the directed direction is controlled at the timing when the baton 2 is directed. However, as described below, for example, music The timing for controlling the volume may be determined based on a predetermined reproduction unit of music data such as a measure, a phrase, a beat, and a note. An example of such a case will be described with reference to FIG.
In FIG. 15, F1 to F4 on the music reproduction time axis t indicate phrases of the music. Also, the direction of the baton represents the direction to which the baton 2 was directed during the music playback. In this figure, the baton 2 is directed east at the beginning of music playback and then directed south. Represents an example. In the following description, it is assumed that the reference orientation is set to “north”. As shown by the solid line 30a, the mobile phone 4 plays the music data of each phrase (F2, F3, F4) in order from the phrase F1 on the music playback time axis t, while the command stick 2 is directed east. Plays the music while maintaining the volume level 64 corresponding to the azimuth angle from the reference azimuth “north”. Then, when the music data of phrase F2 is being reproduced, if the baton 2 is directed from the east to the south at the time t1, the volume level 64 is maintained without changing the volume level until the music data of the phrase F2 has been reproduced. Then, the reproduction is continued, and control is performed so that the volume level is changed to 128 at the timing of starting the reproduction of the music data of the next phrase P3. As described above, the volume control may be performed in units of music phrases. Furthermore, as indicated by the broken line 30b in FIG. 15, when the timing t1 when the baton 2 is directed to “south” is during the reproduction of the measure f21 in the phrase F2, the reproduction of the measure f21 is completed. The volume level 64 may be maintained and reproduced without being changed, and may be controlled by changing to the volume level 128 at the timing of starting reproduction of the next measure f22. In short, the timing for changing the volume is determined based on a predetermined playback unit of music data, and the volume is not changed during the playback unit, but the volume is changed at the timing of entering the next playback unit. Control.

(5) In the above-described first embodiment, as shown in FIG. 6, the sound volume is controlled at a sound volume level set for each predetermined azimuth angle. However, the relationship between the angle amount and the sound volume is shown. A volume condition such as a mathematical formula may be defined in advance, and the volume level may be controlled by obtaining a volume level corresponding to each azimuth angle based on the volume condition. For example, as shown in FIG. 16A, it is defined by a mathematical expression represented by a straight line or a curve indicating the relationship between the azimuth angle from the reference azimuth and the volume. As an example of this mathematical expression, a mathematical expression expressed by a predetermined linear function shown by a straight line 50a in FIG. 16A may be used, or a mathematical expression expressed by a predetermined quadratic function shown by parabolas 50b and 50c may be used. Also, a mathematical expression represented by a predetermined cubic function shown in the curve 50d may be used.

(6) In the above-described first embodiment, the volume is controlled to a volume level corresponding to each azimuth angle with respect to the reference azimuth. However, as shown by a solid line 50e in FIG. The volume level may be controlled in units of angles. In this case, in the mobile phone 4, the user may be able to set the angle unit and the adjustment amount for adjusting the volume level in the angle unit, or may be configured to be set in advance in the mobile phone 4. . For example, when the angle unit is set to 22.5 ° and the adjustment amount is set to +16, when the baton 2 is moved in a certain direction from the direction of the reference azimuth (azimuth angle 0 °) to the azimuth angle 180 °, 0 Control is performed so that the volume level from ° to the azimuth angle moved is increased by an adjustment amount +16 in increments of 22.5 °.

(7) In the second embodiment described above, it is assumed that the volume level is controlled by combining the peak value volume level and the azimuth volume level of the baton 2 at a predetermined ratio at the timing when the acceleration peak value is detected. However, the volume may be controlled not only by the acceleration peak value but also by a volume level corresponding to the acceleration. In this case, for example, the volume corresponding to each azimuth is used as a reference, and an adjustment amount for adjusting each volume according to the magnitude of the acceleration detected in the azimuth is set in advance.

(8) In Embodiment 2 described above, the sound volume is controlled according to the acceleration peak value and the direction. However, in addition to the sound volume control, the shorter the acceleration peak value time interval, the faster the music tempo. The musical performance mode (tempo, pitch, timbre, etc.) may be controlled according to the time interval of the acceleration peak value, such as changing the pitch higher or lower. In this case, for example, in accordance with the time interval of the acceleration peak value, the tempo of the music being played is multiplied by a method such as multiplying the value of the delta time in the music data by a predetermined tempo coefficient for controlling the tempo of the music. And the volume is controlled according to the direction in which the baton 2 is swung. It may be difficult to control the tempo and volume based on the time interval of timing of the baton 2 (acceleration peak time interval) and the strength of the baton 2 (acceleration peak value). In addition, the tempo and the volume can be easily controlled by controlling the tempo according to the acceleration of the baton 2 and controlling the volume according to the direction in which the baton 2 is swung.

(9) In Embodiment 1 described above, the azimuth detecting unit 22 has been described as using a triaxial geomagnetic sensor, but a biaxial geomagnetic sensor may be used. Further, for example, the baton 2 is configured so that a signal (sound, infrared, etc.) having a predetermined directivity can be transmitted, the signal transmitted from the baton 2 is received, and the strength and timing of the received signal are received. Are provided in a space where the user swings the baton 2, and the mobile phone 4 acquires signal information output from these devices and determines the signal strength. The direction pattern of the signal is specified, and the direction is detected using a method other than the geomagnetic sensor, such as a method of obtaining the position (azimuth) of the baton 2 from the timing when each signal is received. Good.

(10) In the above-described embodiment, the volume control device 1 has been described as including the baton 2 and the mobile phone 4, but the mobile phone 4 may have the function of the baton 2. In this case, the mobile phone 4 is provided with an azimuth detecting means, and the mobile phone 4 detects the azimuth and causes the user to sound at a volume corresponding to the position where the mobile phone 4 is moved. The device connected to the baton 2 reproduces sound signals such as music, such as game machines, personal computers, portable information terminals, sports training machines, massage chairs, etc. devices that provide relaxation effects, televisions, radios, etc. If it is the reproducing | regenerating apparatus to perform, it will not be restricted to a mobile telephone. Further, the operator connected to the device including the mobile phone 4 is not limited to the command rod 2 held by the hand, and may be an operator that can be attached to a body such as a user's limb or clothes.

(11) In the above-described first embodiment, the mobile phone 4 identifies the direction in which the command bar 2 is directed from the direction information detected by the direction detection unit 22 of the command bar 2. The command rod 2 is configured to store the orientation conversion table 120, the command rod 2 identifies the orientation based on the detected orientation information and the orientation conversion table 120, and the mobile phone 4 stores information indicating the identified absolute orientation. You may make it transmit to.

(12) In the above-described first embodiment, it has been described that the volume control is performed on the audio signal of the reproduction path output from the speaker 44 inside the mobile phone 4, but the mobile phone 4 is provided with an output terminal, An external speaker or earphone may be connected to the output terminal via an audio cable, and volume control may be performed on the audio signal of the playback path output from the external speaker or earphone.

(13) In the above-described first embodiment, it has been described that the playback volume is controlled in accordance with the direction in which the baton 2 is directed at the time of playback of music data. However, the audio data to be played back is not limited to music data. The volume of audio data arbitrarily set by the user may be controlled.

(14) In the first embodiment described above, the example in which the volume is controlled according to the azimuth angle of the azimuth in which the baton 2 has moved relative to the reference azimuth has been described. For example, the volume level may be set according to the difference or ratio between the reference direction and the direction of the baton 2, or, for example, when the direction that the baton 2 has moved is represented by a time function θ (t). The amount of change in time (angular velocity) ω (t) = dθ (t) / dt and the angular acceleration α (t) = dω (t) / dt as the amount of change in time are used as the amount of change in the command rod 2. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Volume control apparatus, 2 ... Commander stick, 4 ... Mobile telephone, 21, 40 ... Operation part, 22 ... Direction detection part, 23, 41 ... Communication part, 24, 49 ... Control unit, 25 ... Acceleration detection unit, 42 ... Sound source, 43 ... Amplifier, 44 ... Speaker, 45 ... Storage unit, 46 ... Telephone communication unit, 47. ..Mic, 48 ... Display unit

Claims (5)

An azimuth detecting means for detecting the azimuth and outputting azimuth information, and an operator that can be moved by being gripped or mounted by an operator,
A reference orientation setting means for setting a reference orientation;
Detection means for detecting a change amount of the azimuth of the operating element with respect to the reference azimuth based on the reference azimuth set by the reference azimuth setting means and the azimuth information output by the azimuth detection means;
A volume control device, comprising: a volume control unit that is provided in a sound signal reproduction path and controls a volume of the sound signal according to the amount of change detected by the detection unit. A storage means for storing a volume condition defining a relationship between the angle amount and the volume;
The volume control means identifies the volume defined as the angle amount corresponding to the change amount based on the volume condition stored in the storage means, and reproduces the sound signal at the identified volume The sound volume control device according to claim 1, wherein the sound volume control device is controlled so as to perform. A musical sound reproduction means for reproducing a musical sound signal;
An azimuth detecting means for detecting the azimuth and outputting azimuth information; and a momentum detecting means for detecting the momentum; an operator that can be held or moved by the operator and moved;
A reference orientation setting means for setting a reference orientation;
Detecting means for detecting a change in the orientation of the operating element from the reference orientation based on the reference orientation set by the reference orientation setting means and the orientation information output by the orientation detection means;
Volume control means for controlling the volume of a musical sound signal reproduced by the musical sound reproduction means in accordance with the amount of change detected by the detection means;
A musical tone control apparatus comprising: tempo control means for controlling the tempo of the musical tone signal reproduced by the musical tone reproduction means in accordance with the momentum detected by the momentum detecting means. A volume control device according to claim 1 or 2,
And a reproducing means for reproducing the sound signal. To the computer that detects the direction and outputs the direction information, is connected to a movable operator that is gripped or mounted by the operator, and outputs the input sound signal.
An acquisition step of acquiring the azimuth information output by the operator;
A reference orientation setting step for setting a reference orientation;
A detection step of detecting a change amount of the azimuth of the operating element from the reference azimuth based on the reference azimuth set by the reference azimuth setting step and the azimuth information acquired by the acquisition step;
A volume control step for controlling a volume of the sound signal according to the amount of change detected by the detection step.

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