JP2006010978A - System for generating musical sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for musically expressing regularities, appearing among the results detected by two or more sensors within a space. <P>SOLUTION: This system for generating musical sounds is provided with two or more wind sensors 10 for detecting a state change of an object for detection, and a musical sound setting memory 11 which stores discriminating information on each sensor, making it correspond to an attribute of the musical sound to be reproduced, when each wind sensor 10 detects the state change. Further, the system is provided with an electrical signal generating device 12 for outputting the discrimination information of the sensors which detect the state change, and a musical sound signal generating device 13 for generating a signal of the musical sound with the attribute stored in the musical sound setting memory 11, making the musical sound signal correspond to the discriminating information outputted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tone generation system, and more particularly to a tone generation system that generates a tone based on a detection result by a sensor array.

  Various devices have been proposed in the past for detecting physical actions from the outside and expressing the contents with musical sounds. For example, Patent Document 1 discloses a toy that converts an externally applied impact into sound and outputs the sound. As shown in FIG. 16, the toy includes a sensor 22, a timer circuit 23, an acoustic signal synthesis circuit 24, an amplifier 25, a speaker 26, and the like. When the toy is hit or shaken, a detection signal is generated from the sensor 22 that detects the impact. Then, the acoustic signal synthesis circuit 24 supplies an acoustic signal of a predetermined tone color to the amplifier 25 for a preset time length with the support of the timer circuit 23, and the acoustic signal amplified by the amplifier 25 is supplied to the speaker. 26 is output to H.26.

  Non-patent document 1 also discloses the same kind of technology. The system disclosed in this document is composed of 10 UFO-type objects, a computer, a sound source, and the like. And 4 out of 10 objects have built-in Geiger sensors that produce sound in response to gamma waves coming from space. On the other hand, two other objects have built-in infrared sensors that generate sound in response to human movement.

Non-Patent Document 2 discloses a system called “brain opera” that realizes performance by giving musical meaning to a specific motion of a person. In this system, when a performer stands in front of a screen and performs a specific action, a sensor detects the position of the performer's finger on the screen, the pressure touching the screen, the speed of the finger moving on the screen, etc. . A performance is realized by sequentially outputting MIDI (musical instrument digital interface) data set in advance according to the detection result.
Japanese Utility Model 06-064871 http://www.threeweb.ad.jp/~ueharakz/INST/index.html http://brainop.media.mit.edu/onsite/melody/main.html

By the way, when a plurality of sensors are arranged at a certain distance in a certain space and a physical quantity of a specific substance that determines the environment of the space is detected, there is some regularity between the detection results of each sensor. Very often appears. For example, when detecting a wind flowing through a space by a plurality of wind sensors arranged in a certain space, a stronger wind is detected as the distance to the air source is closer, and a weaker wind is detected as the distance increases. A certain kind of regularity appears. There has been a strong demand for realization of such means that allows the observer to understand the regularity that appears between the detection results of the sensors in the space.
The present invention has been devised under such circumstances, and an object of the present invention is to provide a system that musically expresses regularity that appears between detection results of a plurality of sensors in a space.

A musical sound generation system which is a preferred aspect of the present invention is reproduced when a plurality of sensors each detecting a change in the state of a detection target, identification information of each sensor, and each sensor detecting a change in the state. Storage means for storing the corresponding musical tone attributes in association with each other, an output means for specifying the sensor that has detected a change in state, and outputting identification information for the specified sensor, and identification information is output from the output means And a generating means for generating a musical tone signal having the attribute stored in the storage means in association with the identification information.
In this aspect, the musical sound attribute may be a musical tone color, pitch, volume, or a combination thereof.

The sensor may be an optical sensor, a magnetic sensor, an ultrasonic sensor, an infrared sensor, a load sensor, or a combination thereof.
Further, there is provided changing means for changing the content of the attribute associated with each identification information in the storage means every time it is determined whether or not a predetermined time has elapsed in advance and it is determined that the predetermined time has elapsed. Further, it may be provided.
Further, the output means may include means for controlling the volume indicated by the musical tone signal according to the number of times the musical tone signal is output having an attribute associated with the identification information of each sensor.

  According to the present invention, a change in the state of a detection target is detected by a plurality of sensors, and musical tones having attributes previously associated with these sensors are output. Therefore, the regularity appearing between the detection results of the sensors in the space can be perceived by the observer.

(First embodiment)
A first embodiment of the present invention will be described.
A feature of the tone generation system according to the present embodiment is that the flow of the wind in the room is detected by a plurality of sensors arranged in the room, and the detected flow is expressed as music.
FIG. 1 is a block diagram showing a configuration of a musical tone generation system according to the present embodiment. As shown in the figure, the tone generation system includes wind sensors 10A to Z, a tone setting memory 11, an electric signal generator 12, a tone signal generator 13, a sound source 14, an amplifier 15, and a speaker 16.

As shown in FIG. 2, the wind sensor 10 includes a windshield 1, lead wires 2 and 3, a wind receiving portion 4, and the like. Both the lead wire 2 and the lead wire 3 are connected to the electrical signal generator 12 at the upper ends thereof, and the lower part of the lead wire 2 is curved in a spiral shape so as to wrap the lead wire 3. When the wind receiving portion 4 partially connected to the lower end of the lead wire 3 is swung under the action of the wind flowing through the room, the curved portion of the lead wire 2 and the lead wire 3 are electrically short-circuited, and “ON A short circuit signal indicating that “
As shown in FIG. 3, the musical sound setting memory 11 stores a table in which a plurality of records each corresponding to one wind sensor 10 are collected. One record constituting this table includes fields of “sensor” and “musical tone”. Identification information for identifying each wind sensor 10 is stored in the “sensor” field. In the “musical sound” field, a parameter representing an attribute of a musical sound to be reproduced when each wind sensor 10 is turned “ON” is stored. The parameter of this field may represent any of the tone color, pitch, and volume of a musical tone to be reproduced, or may represent a combination of one or more of them. It may also represent another attribute of the musical sound.

As shown in FIG. 4, the electrical signal generation device 12 includes interfaces A to Z connected to each pair of lead wires 2 and 3 for each wind sensor 10. Then, the electrical signal generation device 12 identifies one or more sensors that are “ON” based on the input status of the short circuit signal from each interface, and uses the identification information indicating the identified sensor as an electrical signal as a musical sound. The signal is supplied to the signal generator 13.
As shown in FIG. 5, the musical sound signal generation device 13 specifies identification information of one or more sensors that are “ON” based on the electric signal supplied from the electric signal generation device 12, and specifies the specified identification. The musical tone MIDI data having the attribute stored in the musical tone setting memory 11 in association with the information is generated. This MIDI data represents a key-on MIDI message. For example, if the identification information of a certain sensor is associated with a parameter representing a specific pitch of a musical tone in the table of the musical tone setting memory 11, such a case. Note number data for instructing performance at a proper pitch is included in MIDI data. If the identification information of another sensor is associated with a parameter representing a specific volume of a musical tone, a velocity value instructing performance at such a volume is included in the MIDI data. The musical sound signal generator 13 supplies the generated MIDI data to the sound source 14 as a musical sound signal.

When the MIDI data is supplied to the sound source 14, the sound source 14 outputs analog waveform data of the sound designated by the MIDI data. The analog waveform data output from the sound source 14 is amplified by the amplifier 15 and then supplied to the speaker 16. A musical sound synthesized based on the analog waveform data is emitted from the speaker 16.
As described above, in this system, when the wind sensor 10 installed in the room detects the wind, the musical sound having the attribute uniquely assigned to the wind sensor 10 in the musical sound setting memory 11 is immediately emitted. It has become. The system user appropriately sets an attribute of a musical sound to be assigned to each wind sensor 10 in the room in order to express a music that is comfortable to listen to according to the wind flow in the room. In the following, some examples of musical sound attribute assignments that express such comfortable music are introduced.

  FIG. 6 is a diagram for explaining a first allocation example. In the example shown in the figure, the attribute of the musical sound assigned to each wind sensor is determined in accordance with the distance from the wind source that supplies the wind into the room. That is, a musical sound (for example, drum set sound) having an attribute suitable for rhythm generation is assigned to the wind sensor A that is closest to the wind source, and the wind sensors B and 3 that are the second closest to the wind source are assigned to the wind sensor A. The second closest wind sensor C is assigned a musical sound having an attribute suitable for generating an accompaniment (for example, a stringed instrument sound of two specific pitches that are in a chord relationship with each other). A musical sound having an attribute suitable for generating a melody (for example, wind instrument sound) is assigned to the wind sensor D having the fourth closest distance to the wind source, and the wind sensor E having the furthest distance from the wind source is assigned to the wind sensor E. A musical sound having an attribute suitable for generating a sound effect (for example, orchestra hit sound) is assigned.

  When such an assignment is performed, the wind sensor A detects the wind with the highest frequency, so that a certain order can be given to the entire music piece by the musical sound having the attribute corresponding to the wind sensor A. Further, since there is a slight difference between the timing at which the wind sensor B detects the wind and the timing at which the wind sensor C in the vicinity thereof detects the wind, musical sounds having attributes corresponding to the two wind sensors are alternately emitted. By doing so, a rhythmic accompaniment can be obtained. Further, if the strength of the wind emitted from the wind source is increased every predetermined time length, the wind is also detected by the wind sensor D and the wind sensor E. Therefore, musical sounds having attributes corresponding to these wind sensors are detected. Can give a comfortable accent to the tone of the entire song.

  FIG. 7 is a diagram illustrating a second allocation example. In the example shown in the figure, the attribute of the musical sound assigned to each wind sensor 10 is determined so that it is well harmonized as a chord when played simultaneously. That is, a musical sound with a pitch of “do” is assigned to the wind sensor A closest to the wind source, and a musical sound with a pitch of “mi” is assigned to the second wind sensor B, which is closest to the third. To the wind sensor C, a musical tone having a pitch of “So” is assigned. Then, a musical sound having a pitch of “si” is assigned to the wind sensor D having the fourth closest distance to the wind source, and a musical sound having a pitch of “le” is assigned to the furthest wind sensor E.

  FIG. 8 is a diagram for explaining a third allocation example. In the example shown in the figure, the attributes of the musical sound to be assigned to each wind sensor 10 are determined so as to realize a comfortable ensemble based on the timbres of different musical instruments. That is, the musical tone of “drum” is assigned to the wind sensor A closest to the wind source, and the musical tone of “piano” is assigned to the second wind sensor B, which is closest to the third. To the wind sensor C, a musical tone having a tone of “Sachs” is assigned. Then, the musical sound of the “bass” tone color is assigned to the wind sensor D that is the fourth closest to the wind source, and the musical tone tone of the “guitar” tone is assigned to the farthest wind sensor E.

  FIG. 9 is a diagram illustrating a fourth allocation example. The example shown in the figure is a combination of the above-described second allocation example and third allocation example. That is, the wind sensors are arranged in a two-dimensional matrix of 5 rows × 4 rows, and the wind sensor rows arranged in the horizontal direction are “drums” in order from the row closest to the wind source. While assigning musical sounds that will be the sounds of “piano”, “saxe”, “bass”, and “guitar”, the wind sensor rows in the vertical direction are ordered from the row closest to the wind source. , “Do”, “mi”, “so”, “si” pitches are assigned to the respective musical sounds.

  FIG. 10 is a diagram for explaining a fifth allocation example. In the example shown in the figure, a group of wind sensors to be arranged is divided into a plurality of areas, and the attributes of musical sounds to be assigned to each wind sensor 10 are determined so that the wind sensors 10 in each divided area play chords. To do. That is, the wind sensors 10 arranged in a two-dimensional matrix are grouped into wind sensor groups located in the region C, the region F, the region G, and the region Am, and each wind sensor 10 located in the region C includes: The chords “C”, “M”, and “SO” are assigned to the chords “C”, and each wind sensor 10 located in the region F forms a chord “F”. , “Fa”, “La”, and “Do” pitches are assigned respectively. Each wind sensor 10 located in the region G is assigned a musical tone having a pitch of “So”, “Shi”, and “Le” that constitutes a chord of the chord “G”, and each wind sensor 10 located in the region Am. To the sensor 10, musical tones with a pitch of “La”, “Do”, and “Mi”, which constitute a chord of the code “Am (Aminor)”, are respectively assigned.

  In the present embodiment described above, a plurality of wind sensors 10 each associated with a musical sound having a predetermined attribute are arranged in the room, and the flow of the indoor air detected by each of the wind sensors 10 is expressed as a musical sound. It is like that. Thus, by generating a musical sound using the flow of the wind in the room, it is possible to provide a musical piece having a comfortable fluctuation that is not artificial and is not random at all. In addition, it is possible to provide a musical sound that allows a change in the indoor environment to be sensed.

(Second Embodiment)
A second embodiment of the present invention will be described.
The feature of this embodiment is that the setting contents of the tone setting memory 11 are switched every predetermined time length.
FIG. 11 is a block diagram showing the configuration of the tone generation system according to the present embodiment. The musical sound generation system shown in FIG. 1 includes a wind sensor 10A to Z, a musical sound setting memory 11, an electric signal generation device 12, a musical sound signal generation device 13, a sound source 14, an amplifier 15, a speaker 16, a timer 17, and a setting change device. 18 is provided.
The timer 17 generates the current time and supplies it to the setting change device 18.
The setting changing device 18 determines whether or not a preset predetermined time has elapsed with the assistance of the timer 17 and changes the setting contents of the musical tone setting memory 11 every time it is determined that the predetermined time has elapsed.

FIG. 12 is a diagram illustrating the relationship between setting content change by the setting change device 18 and the time axis. In this figure, the time from time t0 to t1 is a state in which the musical tones of the chord “C” and the pitches “do”, “mi”, and “so” are assigned to the wind sensors A to C, respectively. However, during the period from t1 to t2, a transition is made to a state in which musical tones with pitches of “do”, “fa”, and “la” constituting the chord of the chord “F” are assigned. Further, the time from the time t2 to the time t3 transitions to a state in which the musical tones of the chord “G” and the pitches of “shi”, “so” and “le” are assigned, and from the time t3 to the time t4 During the period of time, a transition is made to a state in which musical tones with pitches of “do”, “la”, and “mi” constituting the chord of the chord “Am” are assigned.
As described above, in the present embodiment, every time a predetermined time elapses, the content of the musical tone attribute associated with the identification information of each wind sensor 10 in the musical tone setting memory 11 is changed. For this reason, the musical tone of each musical tone generated according to the flow of the wind in the room is switched every predetermined time, so that it is possible to generate a musical piece having a more comfortable impression.

(Third embodiment)
A third embodiment of the present invention will be described.
The feature of this embodiment is that the volume level of the musical sound is controlled in accordance with the number of musical sound generations assigned to each sensor.
FIG. 13 is a block diagram showing the configuration of the musical tone generation system according to this embodiment. In addition to the wind sensors 10A to Z, the musical sound setting memory 11, the electric signal generation device 12, the musical sound signal generation device 13, the sound source 14, the amplifier 15, and the speaker 16, the musical sound generation system shown in FIG.

The counter 19 incorporates a counter table having a data structure as shown in FIG. 14, and counts the number of times MIDI data corresponding to each wind sensor 10 is generated.
Then, with the assistance of the counter 19, the musical sound signal generation device 13 according to the present embodiment has exceeded the predetermined number of times (for example, 20 times) the number of generations of musical sound MIDI data corresponding to each wind sensor 10. Judge whether or not. When the number of generations of MIDI data corresponding to a certain wind sensor 10 exceeds a predetermined number, the velocity value included in the MIDI data generated at the next timing is changed and output.

FIG. 15 is a diagram showing the relationship between the number of generations of musical tone MIDI data corresponding to a certain wind sensor 10 and the behavior of the musical tone signal generation device 13. In this figure, the volume of the musical tone is greatly increased when the number of generations of MIDI data exceeds 20 times, when it exceeds 40 times, and when it exceeds 60 times. This means that the tone signal generator 13 changes the velocity value included in the MIDI data to a significantly high value every time the number of generations of MIDI data exceeds 20, and outputs the result.
In the present embodiment described above, when the number of times MIDI data is generated exceeds a predetermined number, the velocity value included in the MIDI data generated at the next timing is changed. For this reason, even in a situation where the wind sensor 10 reacts too sensitively, it is possible to output a musical sound with an appropriate volume at a frequency that is easily recognized by human hearing without thinning out the number of times the sensor reacts.

(Other embodiments)
The present invention can be modified in various ways.
In the above embodiment, the flow of the wind in the room is detected based on the presence or absence of a short circuit between the pair of lead wires 2 and 3, but the wind may be detected by other methods. As another method for detecting the flow of the wind, a method for detecting the displacement of the position of the wind receiving portion 4 by an optical sensor, a magnetic sensor, an ultrasonic sensor, or an infrared sensor, or the wind receiving portion 4 is pulled by a heavy load sensor. A method for detecting force can be assumed.
In the above embodiment, musical tone MIDI data is generated depending on whether or not the “ON” short-circuit signal is supplied from the wind sensor 10. On the other hand, the wind sensor 10 supplies a signal having a value obtained by quantifying the magnitude of the swing of the wind receiving section 4, and the musical sound signal generating device 13 has a magnitude of the swing of the wind receiving section 4. The proportional velocity value may be included in the MIDI data generated by itself.

In the above embodiment, the flow of wind, which is one of the physical quantities that determine the indoor environment, is expressed as music, but changes in other physical quantities may be expressed as music. For example, a change in light emitted into the room may be detected by an optical sensor, a change in magnetism may be detected by a magnetic sensor, and the detected content may be expressed as music, or an ultrasonic wave emitted into the room It may be detected by a sound wave sensor, and the detected content may be expressed as music.
Furthermore, the change in the physical quantity in the room may be expressed not only as music, but also the distance between two specific objects and the change in the movement amount of a person or an object may be expressed as music. The distance between objects can be easily detected by using, for example, an infrared LED (light emitting diode) and an infrared sensor, and the amount of movement of a person or an object can be easily detected by using a heavy load sensor.

  An LED may be mounted on each wind sensor 10 so that each LED is lit when each sensor outputs a short circuit signal. According to such a modified example, the system user can easily recognize which wind sensor 10 is responding and making a musical tone, and can visually enjoy the lighting state of the LEDs. You can also.

  In the third embodiment, when the number of generations of MIDI data exceeds a predetermined number, the MIDI data generated by the tone signal generation device 13 at the next timing includes a significantly large velocity value. . On the other hand, the volume level is not changed according to the number of generations of MIDI data, but the number of times each wind sensor 10 detects wind is counted, and the number of times the wind sensor 10 detects wind is a predetermined number of times. An electrical signal representing the identification information of the sensor may be output from the electrical signal generation device 12 every time. According to such a modification, MIDI data is not generated unless the number of detections exceeds a predetermined number. Therefore, the frequency at which it is easily recognized by human hearing without performing control for switching the velocity value included in the MIDI data. Can output a musical sound with an appropriate volume. The configuration and operation of this modified example are conceptually described as “a plurality of sensors each detecting a change in the state of a detection target, identification information of each sensor, and reproduction when each sensor detects a change in the state. Storage means for storing the musical sound attributes to be associated with each other, the number of times each of the sensors detects a change in state, and a predetermined number of times that a certain sensor detects the change in state When the number of times is exceeded, the output means for outputting the identification information of the sensor, and when the identification information is output from the output means, the musical tone having the attribute stored in the storage means in association with the identification information A musical tone generation system including a generation unit that generates a signal.

It is a block diagram which shows the structure of this embodiment. It is a figure which shows the structure of a wind sensor. It is a data block diagram of a musical tone setting memory. It is a figure which shows the structure of an electric signal generator. It is a figure which shows the structure of a musical tone signal production | generation apparatus. It is a figure which shows the 1st example of allocation of the attribute of a musical tone. It is a figure explaining the 2nd example of allocation of the attribute of a musical tone. It is a figure explaining the 3rd example of allocation of the attribute of a musical tone. It is a figure explaining the example of the 4th allocation of the attribute of a musical tone. It is a figure explaining the 5th example of allocation of the attribute of a musical tone. It is a block diagram which shows the structure of a musical sound generation system. It is a figure showing the relationship between the setting change of a setting change apparatus, and a time axis. It is a block diagram which shows the structure of a musical sound generation system. It is a data structure figure of a counter table. It is a figure showing the relationship between the frequency | count of the production | generation of MIDI data, and the behavior of a musical tone signal production | generation apparatus. It is a block diagram which shows the structure of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Windshield, 2, 3 ... Lead wire, 4 ... Wind receiving part, 10 ... Wind sensor, 11 ... Musical sound setting memory, 12 ... Electric signal generator, 13 ... Musical signal generator, 14 ... Sound source, 15 ... Amplifier, 16 ... Speaker, 17 ... Timer, 18 ... Setting change device, 19 ... Counter

Claims (5)

A plurality of sensors each detecting a change in the state of the detection target;
Storage means for storing the identification information of each sensor and the attribute of the musical sound to be reproduced when each sensor detects a change in state, in association with each other;
An output unit that identifies a sensor that has detected a change in state and outputs identification information of the identified sensor;
When the identification information is output from the output unit, the musical tone generation system includes: a generation unit that generates a musical tone signal of a musical tone having an attribute stored in the storage unit in association with the identification information. In the musical sound generation system according to claim 1,
The musical sound attribute is:
A musical tone generation system that is the tone, pitch, volume, or combination of musical tones. In the musical tone generation system according to claim 1 or 2,
The sensor is
A musical tone generation system comprising an optical sensor, a magnetic sensor, an ultrasonic sensor, an infrared sensor, a load sensor, or a combination thereof. In the musical sound generation system according to any one of claims 1 to 3,
A change unit for determining whether or not a predetermined time set in advance has elapsed, and for changing the content of the attribute associated with each identification information in the storage unit every time it is determined that the predetermined time has elapsed; Music generation system. In the musical sound generation system according to any one of claims 1 to 4,
The output means includes
A musical tone generation system comprising means for controlling a volume indicated by a musical tone signal in accordance with the number of times the musical tone signal is output having an attribute associated with identification information of each sensor.

Images