JP2006030578A - Music signal converter and music control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a music signal converting device reducing facility cost, and also to provide a music control system using the music signal converting device. <P>SOLUTION: A music signal S1 is inputted, then the inputted musical signal S1 is frequency-converted to generate frequency level signals S21 to S23, which are generated while sectioned by a plurality of frequency bands include din the music signal S1 to have levels corresponding to the intensity of the music signal S1 by the frequency bands, so that the frequency level signals S21 to S23 are individually outputted for the plurality of frequency bands from independent output terminals 21 to 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a music signal converter and a music control system using the same.

  In the optical display using laser beam, lighting equipment, fountain equipment, theater seats, etc., the light intensity, illuminance, fountain amount or seat vibration amount etc. are controlled according to the sound pressure level of the music, and the attendance of the audience Techniques for stimulating or increasing the feeling are known.

  As a specific example, for example, in a fountain facility, a music control system that synchronizes music and water volume using MIDI (Musical Instrument Digital Interface) is known as a music control system that can control water volume according to music. .

  In a music control system using MIDI, music is converted into a MIDI file and the MIDI file is stored in a database. Therefore, a fountain facility is synchronized with the music using a PLC (programmable controller) having a MIDI interface. Inverters, pumps, etc. can be controlled.

  However, in a music control system using MIDI, a music CD is edited and a MIDI file is created, so that it is necessary to pay a copyright fee for a copy right, an identity retention right, etc., and the cost increases. In addition, in order to create a MIDI file by editing a music CD, a problem that an advanced editing technique is required, or in general, it takes a considerable amount of time to create a MIDI file. There is a problem that the fountain cannot be controlled (cannot play a new song) until it is created.

  As another known technique, Patent Documents 1 to 3 disclose a technique for performing fountain control in synchronization with music without using a database made up of MIDI files or the like. However, the music control systems disclosed in Patent Documents 1 to 3 have a problem that the configuration for determining the fountain operation by analyzing the music signal is complicated, and the cost cannot be reduced.

  In addition, since Patent Documents 1 to 3 do not specifically disclose a technique for visualizing a music signal, depending on the method for analyzing the music signal, there is a possibility that the fountain operation cannot be seen in synchronization with the music.

There are similar problems in the vibration control of an optical display using a laser beam, a lighting facility, or a theater seat.
JP-A-7-185422 Japanese Patent Application Laid-Open No. 8-243442 JP 2004-148233 A

  The subject of this invention is providing the music signal converter which can aim at reduction of installation cost, and a music control system using the same.

  Another object of the present invention is to provide a music signal converter capable of controlling a device in synchronization with music, and a music control system using the same.

  Still another object of the present invention is to provide a music signal converter capable of controlling a device in synchronization with music without using a MIDI file, and a music control system using the same.

  In order to solve the above-described problems, a music signal conversion apparatus according to the present invention receives a music signal, converts the frequency of the input music signal, and generates a frequency level signal. The frequency level signal is generated by being divided into a plurality of frequency bands included in the music signal, and has a level corresponding to the strength of the music signal for each frequency band. A frequency level signal is individually output for each of a plurality of frequency bands from each of independent output terminals.

  The music signal conversion device according to the present invention is combined with a controlled device to constitute a music control system. The controlled device is controlled by the frequency level signal output from each of the output terminals, and operates according to the level of the frequency level signal.

  As described above, the music signal conversion device according to the present invention frequency-converts an input music signal to generate a frequency level signal, and the frequency level signal is output from a plurality of independent output terminals to a plurality of frequency bands. Output individually for each. For this reason, it becomes possible to control the controlled device in synchronization with music by using the frequency level signal output individually.

  In the music signal conversion apparatus according to the present invention, the frequency level signal corresponding to the music signal can be individually output from each of the independent output terminals, so there is no need to create a MIDI file. For this reason, it is not necessary to pay the copyright fee for the copy right, the identity retention right, etc. required when creating the MIDI file, and the increase in cost can be suppressed.

  Furthermore, since the music signal conversion apparatus according to the present invention does not use a MIDI file, it eliminates the need for advanced editing techniques and time required to create a MIDI file, and is low cost, easy, and quickly. A frequency level signal corresponding to the music signal can be output.

  Further, in the music control system according to the present invention, the controlled device performs an operation corresponding to the level of the frequency level signal, whereby the strength of the music signal is visually recognized (visualized) or experienced, and the music is visually Appreciated in a sense or experience. The controlled device is, for example, a fountain facility, a lighting facility, a vibration device that vibrates the backrest of a seat in a theater in accordance with music.

As described above, according to the present invention, the following effects can be obtained.
(A) It is possible to provide a music signal conversion apparatus capable of reducing equipment costs and a music control system using the same.
(B) It is possible to provide a music signal converter capable of controlling a device in synchronization with music, and a music control system using the same.
(C) It is possible to provide a music signal conversion apparatus capable of controlling a device in synchronization with music without using a MIDI file, and a music control system using the same.

  Other features of the present invention and the operational effects thereof will be described in more detail by way of examples with reference to the accompanying drawings.

  FIG. 1 is a diagram for explaining an embodiment of a music control system according to the present invention, FIGS. 2 and 3 are partially enlarged views of FIG. 1, and FIG. 4 is an operation waveform diagram of the music signal converter. The music control system shown in FIG. 1 includes a music signal converter 1 according to the present invention, a controlled device, an amplifying device 61, and a speaker 62.

  The controlled device is, for example, a fountain facility, a lighting facility, a vibration device that applies vibration to the backrest of a seat in a theater in accordance with music. The music control system according to the present invention may be a new music control system or a music control system renewed using an existing controlled apparatus.

  In the example of illustration, a controlled device is fountain equipment, for example, and includes inverters 71-73, pumps 74-76, and fountain ports P1-P25. In FIG. 3, the fountain ports P1 to P25 are provided at predetermined positions, respectively. The number and shape of the fountain ports P1 to P25 are arbitrary.

  Referring again to FIG. 1, the music signal conversion device 1 includes a music signal generation device 50, a music signal output terminal 51, a signal generation unit 10, and output terminals 21 to 23. The music signal generation device 50 is, for example, a CD drive built in a personal computer, and has a function of outputting a music signal S1.

  The music signal S1 may be an analog signal or a digital signal. The music signal generation device 50 may be, for example, a CD player, an MD player, a microphone, or the like that is not built in the computer. In the illustrated embodiment, the music signal generation device 50 is provided inside the music signal conversion device 1, but may be provided outside the music signal conversion device 1.

  The signal generation unit 10 is, for example, a device that combines a personal computer and a PLC (programmable logic controller), and includes an input terminal 11. The signal generation unit 10 may be constituted by, for example, a personal computer or a workstation. The input terminal 11 is a terminal for inputting the music signal S1.

  The signal generation unit 10 has a function of performing frequency conversion on the music signal S1 input to the input terminal 11 to generate frequency level signals S21 to S23. In the illustrated embodiment, the case where the frequency level signal is generated by being divided into three frequency bands has been described as an example, but the number of frequency band divisions is arbitrary. The plurality of frequency bands are preferably audible frequency bands.

  The output terminals 21 to 23 are provided independently. Each of the output terminals 21 to 23 has a function of individually outputting the frequency level signals S21 to S23.

  The amplifying device 61 has a function of amplifying and outputting the music signal S1 supplied via the music signal output terminal 51. The speaker 62 has a function of outputting the signal amplified by the amplification device 61 as sound.

  Next, the operation of the music control system will be described with reference to FIGS.

  First, the music signal generation device 50 outputs the music signal S <b> 1 to the signal generation unit 10 via the input terminal 11. For example, when the music signal generating device 50 is a CD player, the music signal generating device 50 outputs the music signal S1 by reproducing the music information recorded on the recording medium (CD). For example, when the music signal generation device 50 is a microphone, the music signal generation device 50 performs mechanical-electrical conversion on an analog signal such as vocal music and outputs a music signal S1.

  As shown in FIG. 4A, the music signal S1 is a signal corresponding to the sound output from the speaker 62, and the sound pressure level changes with time.

  First, as shown in FIG. 4B, the signal generation unit 10 performs frequency conversion by applying FFT (Fast Fourier Transform) to the music signal S1. In executing the FFT, for example, it is preferable that the data length is 80 ms or less and the number of sampling points is 2048 or more. In addition to the FFT, frequency conversion may be performed using wavelet conversion or the like.

For example, in FIG. 4A, at times 0 to 80, 160 to 240, and 240 to 320 [ms], many signals in a low frequency band (2 × 10 ⁰ to 2 × 10 ¹ Hz) are included. . For this reason, if the music signal S1 at these times is subjected to FFT, the level of the low frequency band is increased.

In addition, at times 320 to 400 [ms], since many signals in the high frequency band (2 × 10 ² to 2 × 10 ³ Hz) are included, if the music signal S1 at this time is subjected to FFT, The level of the frequency band increases.

Similarly, at time 80 to 160 [ms], since many signals in the intermediate frequency band (2 × 10 ¹ to 2 × 10 ² Hz) are included, if the music signal S1 at this time is subjected to FFT, The level of the intermediate frequency band is increased.

Next, as illustrated in FIG. 4C, the signal generation unit 10 uses a low frequency band (2 × 10 ⁰ to 2 × 10 ¹ Hz) and an intermediate frequency band (2 × 10 × 2) for signals obtained by performing FFT. 10 ^{1 to} 2 × 10 ² Hz) and an average value of levels for each high frequency band (2 × 10 ² to 2 × 10 ³ Hz).

  Next, as shown in FIG. 4D, the signal generation unit 10 generates frequency level signals S21 to S23 individually assigned to the output terminals 21 to 23, and generates the frequency level signals S21 to S23. Store in the memory 32.

  The frequency level signals S21 to S23 are generated separately for each of the low, medium and high frequency bands included in the music signal S1, and have a level corresponding to the strength of the music signal S1 for each frequency band. . The level corresponding to the strength of the music signal may be, for example, a value obtained by calculating a maximum value, a minimum value, or the like of the sound pressure level of the music signal S1 for each frequency band.

  For example, in FIG. 4D, the average value of the low frequency band level (frequency level signal S21) is assigned to the output terminal 21, and the average value of the intermediate frequency band level (frequency level signal S22) is the output terminal 22. The average value of the high frequency band level (frequency level signal S23) is assigned to the output terminal 23.

  Again, a description will be given with reference to FIG. Next, the music signal generating device 50 supplies the music signal S <b> 1 to the amplifying device 61 and the speaker 62 via the music signal output terminal 51. Thus, the music signal S1 is output as a sound from the speaker 62.

  In addition, the music signal generation device 50 outputs the frequency level signals S21 to S23 stored in the memory 32 from the output terminals 21 to 23 at a predetermined timing synchronized with the sound output from the speaker 62, respectively. Specifically, the frequency level signal S21 is output from the output terminal 21, the frequency level signal S22 is output from the output terminal 22, and the frequency level signal S23 is output from the output terminal 23.

  The frequency level signals S21 to S23 output from the output terminals 21 to 23 are supplied to the inverters 71 to 73, respectively. The inverters 71 to 73 perform voltage-frequency conversion on the supplied frequency level signals S21 to S23, and supply them individually to the pumps 74 to 76, respectively.

  The pump 74 outputs the amount of water corresponding to the frequency level signal S21 from the fountain port P1, the pump 75 outputs the amount of water corresponding to the frequency level signal S22 from the fountain ports P2 to P9, and the pump 76 outputs the frequency level signal S23. The amount of water corresponding to is output from the fountain ports P10 to P25.

  The control of the water supply operation by the pumps 74 to 76 may be, for example, controlling the pump compressor corresponding to the frequency of the frequency level signals S21 to S23 as in the illustrated embodiment, or the frequency level signals S21 to S21. Corresponding to S23, the hole diameters and the like of the fountain ports P10 to P25 may be changed, and as a result, the water pressure applied from the pumps 74 to 76 to the fountain ports P10 to P25 may be controlled.

  Thereby, the fountain opening P1 changes in the amount of fountain corresponding to the low frequency band of the music signal S1, and the fountain openings P2 to P9 change in the amount of fountain corresponding to the intermediate frequency band of the music signal S1. In the mouths P10 to P25, the fountain amount changes corresponding to the high frequency band of the music signal S1, and the respective sound pressure levels from the low sound range to the high sound range of the music signal S1 are visualized.

  As described above, the music signal conversion device 1 according to the present invention frequency-converts the input music signal S1 to generate the frequency level signals S21 to S23, and the frequency level signals S21 to S23 as independent output terminals. Each of 21 to 23 is output individually for each of a plurality of frequency bands. For this reason, by using the frequency level signals S21 to S23 output individually, it becomes possible to control the controlled device in synchronization with the music.

  In addition, in the music signal conversion apparatus 1 according to the present invention, the frequency level signals S21 to S23 corresponding to the music signal S1 can be individually output from the independent output terminals 21 to 23, so it is necessary to create a MIDI file. There is no. For this reason, it is not necessary to pay a copyright fee for a copy right, an identity retention right, etc., which are required when creating a MIDI file, and an increase in cost can be suppressed.

  Furthermore, since the music signal conversion apparatus 1 according to the present invention does not use a MIDI file, it eliminates the need for advanced editing techniques and time required to create a MIDI file, and is low-cost, easy and quick. The frequency level signals S21 to S23 corresponding to the music signal S1 can be output.

  In the music control system according to the present invention, the controlled device performs an operation corresponding to the level of the frequency level signals S21 to S23, so that the strength of the music signal S1 is visually recognized (visualized) or sensed. Music is appreciated visually or bodily.

  Further, in the illustrated music control system, since each of the fountain ports P1 to P25 is provided at a predetermined position, for example, the fountain amount corresponding to the frequency band is output from each of the fountain ports P1 to P25. By doing so, the intensity of the music signal S1 can be visually recognized (visualized) very easily.

  On the other hand, Patent Documents 1 to 3 do not explicitly indicate that an output terminal (fountain port) is associated with each frequency band. Therefore, in the music control systems described in Patent Documents 1 to 3, it is considered that the level of the entire frequency band corresponds to the data of the fountain operation, the basic performance pattern, etc., and complicated signal processing and control are performed. Is considered necessary.

  In the illustrated music control system, since the frequency level signals S21 to S23 are stored in the memory 32 in advance, by reading the stored frequency level signals S21 to S23 from the memory 32, the fountain ports P1 to P25 are displayed. The amount of fountain can be controlled. For this reason, it is not necessary to perform the process which produces | generates frequency level signal S21-S23 at high speed, and can reduce installation cost.

  In addition, when the music control system shown in the figure outputs the music signal S11 from the speaker 62, the timing is supplied to the signal generation unit 10, so that the sound output from the speaker 62 and the fountains at the fountain ports P1 to P25 are supplied. The quantity can be easily synchronized.

  In the illustrated music control system, the frequency level signals S21 to S23 are stored in advance in the memory 32 for each of a plurality of music signals S1 corresponding to different music pieces, and any of the plurality of music signals S1 is stored. When one music signal S1 is output from the speaker 62, the frequency level signals S21 to S23 corresponding to the one music signal S1 are read from the memory 32, and the fountain amount at the fountain ports P1 to P25 can be controlled. .

  Further, in the music control system according to the present invention, when the music signal S1 is output from the speaker 62 without storing the frequency level signals S21 to S23 in the memory, the frequency level signals S21 to S23 are generated at high speed. You may control the amount of fountains of the fountain ports P1-P25. At this time, the sound output from the speaker 62 and the amount of fountain at the fountain ports P1 to P25 need only be synchronized to the extent that a person can feel that they are synchronized. For example, the synchronization can be improved by increasing or decreasing the FFT data length or the number of samplings, increasing the processing speed of the signal generation unit, or the like.

  FIG. 5 is a diagram for explaining another embodiment of the music control system according to the present invention. In the figure, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description is omitted.

  In the illustrated music control system, the music signal converter 1 includes a switch panel 34. The switch panel 34 includes switches 341 to 345. For example, when the child presses any of the switches 341 to 345, the switch panel 34 supplies the signal generation unit 10 with the switch panel signal S3 corresponding to each of the switches 341 to 345.

  When the switch panel signal S3 is supplied, the signal generator 10 outputs a fountain control signal (not shown) corresponding to the switch panel signal S3 on the condition that the frequency level signals S21 to S23 are not output. Output from 21 to 23. Thereby, the fountain ports P1-P25 can implement the fountain control corresponding to the switch panel signal S3.

  In the illustrated music control system, the memory 32 stores timer control information. The timer control information is information for outputting a predetermined fountain control signal (not shown) from the output terminals 21 to 23 at a predetermined time in preference to the frequency level signals S21 to S23. Thereby, the fountain ports P1-P25 can implement the fountain control defined by the timer control information at a predetermined time.

  The illustrated music control system has the same components as those of the music control system shown in FIGS.

  FIG. 6 is a view for explaining still another embodiment of the music control system according to the present invention. In the figure, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and redundant description is omitted.

  The illustrated music control system is, for example, a music control system using lighting equipment. In the illustrated embodiment, the controlled device is a lighting facility, and includes servo mechanisms 77 to 79 and lighting devices 81 to 83. The illuminating devices 81 to 83 are, for example, neon signs, illumination lamps, and the like.

  In the music control system having such a configuration, the signal generator 10 supplies the frequency level signals S21 to S23 to the servo mechanisms 77 to 79, respectively. Each of the servo mechanisms 77 to 79 numerically converts the supplied frequency level signals S21 to S23 and adjusts the respective light amounts of the illumination devices 81 to 83.

  In this manner, in the illustrated music control system, the light amounts of the lighting devices 81 to 83 change in response to the frequency level signals S21 to S23, so that the strength of the music signal is visually recognized (visualized) and the music is played. It will be appreciated visually.

  The illustrated music control system has the same components as those of the music control system shown in FIGS. 1 to 5, so that the same operational effects can be achieved.

  FIG. 7 is a view for explaining another embodiment of the music control system according to the present invention. In the figure, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals, and redundant description is omitted.

  In the music control system shown in the figure, the controlled devices are a fountain facility and a lighting facility. The controlled devices include servo mechanisms 77 to 79, pumps (not shown), fountain ports P1 to P25, and lighting devices 81 to 83.

  In the illustrated music control system, the signal generation unit 10 supplies frequency level signals S21 to S23 to the servo mechanisms 77 to 79, respectively. Each of the servo mechanisms 77 to 79 performs numerical conversion on the supplied frequency level signals S21 to S23 to control the lighting devices 81 to 83 and the fountain ports P1 to P25.

  In each of the fountain ports P1 to P25, the nozzle diameters (hole diameters) of the fountain ports P1 to P25 change corresponding to the frequency level signals S21 to S23, and as a result, the water pressure applied from the pump to the fountain ports P1 to P25. Changes, and the fountain amount at the fountain ports P1 to P25 is controlled. Each of the illuminating devices 81 to 83 is controlled in light quantity corresponding to the frequency level signals S21 to S23.

  Thus, in the illustrated music control system, the lighting devices 81 to 83 and the fountain ports P1 to P25 are controlled corresponding to the frequency level signals S21 to S23, so that the strength of the music signal is visually recognized (visualized). ) And the music will be visually appreciated.

  The illustrated music control system has the same components as those of the music control system shown in FIGS. 1 to 6, so that the same operational effects can be achieved.

  While the present invention has been described with reference to the embodiment, it is needless to say that the present invention is not limited to this embodiment, and various modifications and changes can be made within the scope of the claims.

It is a figure explaining one Example of the music control system which concerns on this invention. It is the elements on larger scale of FIG. It is another partial enlarged view of FIG. It is an operation | movement waveform diagram of a music signal converter. It is a figure explaining another Example of the music control system which concerns on this invention. It is a figure explaining another one Example of the music control system which concerns on this invention. It is a figure explaining another one Example of the music control system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Music signal converter 10 Signal generation part 21-23 Output terminal 50 Music signal generator 61 Amplifier 62 Speaker 71-73 Inverter 74-76 Pump P1-P25 Fountain

Claims (2)

A music signal converter,
A music signal is input, the input music signal is frequency-converted to generate a frequency level signal, and the frequency level signal is generated separately for each of a plurality of frequency bands included in the music signal, Each frequency band has a level corresponding to the strength of the music signal,
The frequency level signal is individually output from each of the independent output terminals for each of the plurality of frequency bands.
Music signal converter. A music control system including a music signal conversion device and a controlled device,
The music signal converter is the one described in claim 1,
The controlled device is controlled by the frequency level signal output from each of the output terminals, and operates corresponding to the level of the frequency level signal.
Music control system.

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