JP6338313B2 - Stringed instrument detection system - Google Patents

Stringed instrument detection system Download PDF

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Publication number
JP6338313B2
JP6338313B2 JP2017500469A JP2017500469A JP6338313B2 JP 6338313 B2 JP6338313 B2 JP 6338313B2 JP 2017500469 A JP2017500469 A JP 2017500469A JP 2017500469 A JP2017500469 A JP 2017500469A JP 6338313 B2 JP6338313 B2 JP 6338313B2
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conductive
signal
detection system
configured
fingerboard
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JP2017509032A (en
JP2017509032A5 (en
Inventor
ミズライ,シモン
シオン テー,ベン
シオン テー,ベン
Original Assignee
オー.エム.ビー.ギター リミテッドO.M.B.Guitars Ltd.
オー.エム.ビー.ギター リミテッドO.M.B.Guitars Ltd.
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Priority to US61/954,937 priority
Application filed by オー.エム.ビー.ギター リミテッドO.M.B.Guitars Ltd., オー.エム.ビー.ギター リミテッドO.M.B.Guitars Ltd. filed Critical オー.エム.ビー.ギター リミテッドO.M.B.Guitars Ltd.
Priority to PCT/IL2015/050244 priority patent/WO2015140783A1/en
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Publication of JP2017509032A5 publication Critical patent/JP2017509032A5/ja
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/32Constructional details
    • G10H1/34Switch arrangements, e.g. keyboards or mechanical switches peculiar to electrophonic musical instruments
    • G10H1/342Switch arrangements, e.g. keyboards or mechanical switches peculiar to electrophonic musical instruments for guitar-like instruments with or without strings and with a neck on which switches or string-fret contacts are used to detect the notes being played
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H2220/00Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155User input interfaces for electrophonic musical instruments
    • G10H2220/165User input interfaces for electrophonic musical instruments for string input, i.e. special characteristics in string composition or use for sensing purposes, e.g. causing the string to become its own sensor
    • G10H2220/171User input interfaces for electrophonic musical instruments for string input, i.e. special characteristics in string composition or use for sensing purposes, e.g. causing the string to become its own sensor using electrified strings, e.g. strings carrying coded or AC signals for transducing, sustain, fret length or fingering detection
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H2220/00Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155User input interfaces for electrophonic musical instruments
    • G10H2220/265Key design details; Special characteristics of individual keys of a keyboard; Key-like musical input devices, e.g. finger sensors, pedals, potentiometers, selectors
    • G10H2220/275Switching mechanism or sensor details of individual keys, e.g. details of key contacts, hall effect or piezoelectric sensors used for key position or movement sensing purposes; Mounting thereof
    • G10H2220/295Switch matrix, e.g. contact array common to several keys, the actuated keys being identified by the rows and columns in contact
    • G10H2220/301Fret-like switch array arrangements for guitar necks

Description

  The present invention generally relates to a detection system for a stringed instrument, and more particularly to a detection system and method for detecting and transmitting data representing a string being played on a fingerboard of the stringed instrument.

  Several stringed instruments with a detection system for detecting the played sound are known. U.S. Pat. No. 4,653,518 discloses an electronic stringed instrument with an electrically isolated fingerboard. The fingerboard is provided with a plurality of segmented frets attached along its length at predetermined locations across the upper surface. Each of the frets includes a plurality of electrically conductive fret segments, each fret segment being electrically insulated from one another. The instrument is provided with any number of strings, each string being placed and related in close proximity to each single fret segment of the fret segment. A top octave generator and an octave divider are used to selectively supply at least one known reference frequency electronic signal to one fret segment of the fret. The strings are attached to the stringed instrument at intervals with respect to the fret segments. Moving the string into contact with one of the fret segments forms an electrical circuit that generates at least one frequency equal to the frequency of the signal supplied to that fret segment. When the same string is moved into contact with different fret segments, another electrical circuit is formed that generates at least one different frequency. Pressing multiple strings simultaneously creates a plurality of electrical circuits, each of which can generate several different frequencies. The amplitude of the stringed instrument depends on the voltage applied to each string and is controlled by a manually operated transducer.

  US Publication No. 2012017748 discloses a digital musical instrument that includes a fingerboard and one or more strings extending over the fingerboard. The instrument further includes an electrical circuit that generates a digital signal based on a position associated with contact with the fingerboard of the string, and a transceiver that transmits the digital signal to a processing device that generates a score based on the digital signal. .

  U.S. Pat. No. 8,454,418 discloses a game controller for computer game applications comprising one or more strings. Multiple frets can be placed on the fingerboard and under the strings. The frets can include conductive regions that can be electrically isolated from each other, each region corresponding to a different string. A polyphonic pickup having a plurality of coupled winding coils corresponding to the magnetic return can be included and can be adapted to detect the hit of at least one string by a user of the game controller. The output signal may be transmitted from the controller to a game application indicating the fingering of the game controller and the time at which the game controller's string was struck. A multi-mode device is also described. Devices with strings can be used as both game controllers and musical instruments.

  WO 2013109657 describes an electronic stringed instrument practice device configured to perform one or more of the following: a finger position and / or a string that touches the fret on the finger or fingerboard is a suitable note. A device for practicing electronic string instruments that detects when a chord of music or music is composed, indicates the appropriate visual position for forming a note or a chord of music, and detects when a string is selected (such as strumming) It is disclosed. The electronic stringed musical instrument training device can emit sounds in the form of musical notes or musical chords. The electronic stringed musical instrument training device may include a communication module for communicating with other computing devices such as mobile phones and tablets. The electronic string instrument training device can interact with applications on other computing devices to assist users learning how to play string instruments.

  US Publication No. 2013247744 discloses a stringed instrument equipped with a conductor that is electrically connected to the frets provided on the fingerboard of the stringed instrument. The stringed instrument is equipped with a power source, a light emitting unit (light emitting diode of one embodiment) that is in electrical contact with the string of the stringed instrument, and a conductor that electrically connects the components of the invention together. By pressing any of the strings that can send current against any of the frets that can send current, connected to an electrical circuit composed of the electrical components, the circuit closes and On the other hand, the light emitting unit associated with the depressed string is turned on.

  Japanese Publication No. 2009271484 discloses that in a stringed musical instrument production device, a sensing means for sensing contact / non-contact by bringing a string and a fret into a conductive state, and a predetermined light emission by a rendering means linked to the sensing means. doing.

One form of the present invention provides a fingerboard for a stringed instrument in combination with a detection system, the fingerboard having a plurality of conductive frets disposed at various positions along its length; And at least one conductive string extending over the fret along the length of the fingerboard and spaced from the fret.
The detection system includes:
A conductor disposed along the length of the fingerboard connected to each of the frets;
A converter having a first terminal connected to the conductor and a second terminal connected to the at least one conductive string, wherein the converter logically converts a transmitted signal. The signal is transmitted when the at least one conductive string is pressed against one of the frets so that a signal can be transmitted through the conductive string. A transducer that is continuously converted between two logic states at a frequency depending on the distance between the vessel and the fret;
A frequency detector for measuring the frequency;
A control device for determining the position of the fret along the fingerboard according to the frequency.

  The fingerboard may include a plurality of conductive strings.

  The conductor has the plurality of conductive strings such that an average distance from each of the plurality of conductive strings to the two conductors is equal to all of the plurality of conductive strings. There may be provided two conductors arranged for each of the two.

The conductive string can be configured to vibrate to produce a musical sound. The conductive string can include a conductive material wound on a non-conductive core.
The conductive string and the plurality of conductive frets may be configured to transmit a low-voltage current that is not affected by a user's finger. Each of the plurality of conductive strings may be configured to receive a signal from the transducer.

  The transducer is configured to select one of a number of data output lines, and each of the data output lines can be connected to one of the plurality of conductive strings.

  The combination further comprises a demultiplexer, the demultiplexer being configured to receive an input signal from the converter and an output configured to select one of a number of data output lines. And each of the data output lines can be connected to one of the plurality of conductive strings.

  The converter may be configured to convert an input voltage corresponding to logic 1 to an output voltage corresponding to logic 0.

  The combination may further comprise a controller configured to detect which of the plurality of conductive strings is pressed against one of the plurality of frets.

  The control device and the frequency detector can be mounted on a CPU module.

  The combination may further comprise an electronic component connected to the converter, the electronic component being configured to delay the signal and increase the wavelength.

  The electronic component may be a capacitor.

Another aspect of the present invention is a detection system for detecting a note played on a stringed instrument having a fingerboard, wherein the fingerboard extends along the plurality of conductive frets and the conductive frets. A detection system comprising at least one conductive string is provided.
The detection system comprises at least one conductor connected to each of the frets;
A converter having a first terminal connected to the conductor and a second terminal connected to the at least one conductive string, wherein the converter logically converts a transmitted signal. When the conductive string is pressed against one of the frets and a signal is transmitted through the conductive string, the signal is transmitted to the transducer and the fret. A converter that is continuously converted between two logic states at a frequency depending on the distance between
A frequency detector configured to measure the frequency;
A controller configured to determine a position of the fret along the fingerboard according to the frequency and thereby detect the notes.

  The transducer is configured to select one of a number of data output lines, each of the data output lines being one of a musical instrument having a plurality of conductive strings extending along the fingerboard. It can be configured to connect to a conductive string.

  The detection system further comprises a demultiplexer, the demultiplexer configured to select an input configured to receive an input signal from the converter and one of a number of data output lines. Each of the data output lines can be connected to one of the plurality of conductive strings.

  The first terminal of the converter may be an input terminal and the second terminal may be an output terminal. The converter may be configured to convert an input voltage corresponding to logic 1 to an output voltage corresponding to logic 0.

  The detection system can further comprise a controller configured to detect which of the plurality of conductive strings is pressed against one of the plurality of frets.

  The detection system further comprises a capacitor that connects to the transducer to form a signal resonance in the signal, thereby delaying the signal to delay the signal, the wavelength of the signal Can be configured to increase.

  The detection system can comprise a power source for generating a signal through the conductive string.

  The detection system further comprises a demultiplexer, the demultiplexer configured to select an input configured to receive an input signal from the converter and one of a number of data output lines. Each of the data output lines can be connected to one of the plurality of conductive strings.

  The transducer is configured to select one of a number of data output lines, each of the data output lines being one of a musical instrument having a plurality of conductive strings extending along the fingerboard. It can be configured to connect to a conductive string. The detection system further comprises a demultiplexer, the demultiplexer configured to select an input configured to receive an input signal from the converter and one of a number of data output lines. Each of the data output lines can be connected to one of the plurality of conductive strings.

  The detection system can further comprise a controller configured to detect which of the plurality of conductive strings is pressed against one of the plurality of frets.

  The detection system may further comprise an electronic component connected to the transducer, the electronic component being configured to delay the signal and increase the wavelength of the signal. The electronic component is a capacitor and is configured to form a signal resonance in the signal, thereby delaying the signal.

According to another aspect of the present invention, there is provided a method for detecting a note played by a stringed instrument having a fingerboard, wherein the fingerboard includes a plurality of conductive frets respectively connected to a conductor. And at least one conductive string extending along the length of the fingerboard.
The method
Generating an electrical signal through the conductive string, wherein the signal can be transmitted through one of the frets when the conductive string is pressed against the fret;
Logically converting the signal by a transducer, the transducer having a first terminal connected to the conductor and a second terminal connected to the conductive string; When the conductive string is pressed against one of the frets and the signal is transmitted through the conductor, the signal depends on the distance between the transducer and the fret Being continuously converted between two logic states in frequency,
Detecting the frequency with a frequency detector;
Calculating the position of the fret along the fingerboard according to the frequency;
Determining the notes to be played on the instrument according to the position.

According to another aspect of the present invention, there is provided a detection system for detecting a note played by a stringed instrument having a fingerboard, wherein the fingerboard is connected to a plurality of spaced conductive elements respectively connected to a conductor. And fret and at least one conductive string extending over the fret.
The detection system includes:
A power source for generating a signal through the conductive string;
A transducer having a first terminal connected to the conductor and a second terminal connected to the conductive string;
A frequency detector configured to measure the frequency;
A control device for determining the position of the fret along the fingerboard according to the frequency.
The transducer is configured to logically transform a transmitted signal so that the conductive string is pressed against one of the frets so that the signal passes through the conductive string. When transmitted, the signal is continuously converted between two logic states at a frequency depending on the distance between the transducer and the frets.

1 is a block diagram of a fingerboard and detection system constructed and operative in accordance with an embodiment of the present invention. FIG. 6 is a block diagram of a fingerboard and detection system constructed and operative in accordance with another embodiment of the present invention. 2 is a graphic representation of a specific example of a signal generated by the detection system of FIG. 3 is a graphic representation of a specific example of a signal generated by the detection system of FIG.

  The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings, but is not limited in any way.

  FIG. 1 shows a schematic view of a fingerboard 10 of a musical instrument (not shown) including a substrate 11 having a plurality of conductive frets 14a-14f and a plurality of conductive strings 12a-12f provided sideways, The string extends over the fret along the length of the fingerboard and is not in contact with the fret. Conductive strings 12a-12f and conductive frets 14a-14f can be configured to carry low voltage currents, eg, currents that are not sensed or affected by the user.

  The conductive strings 12a-12f are free to vibrate, however, under control. The conductive strings 12a-12f can be made of a single material, such as steel, or other material on a core of one material, such as a plastic core wrapped with metal wire and can do. In the latter, one or both materials are made of a conductive material.

  The number of strings and frets can be varied according to the requirements required for the particular type of instrument on which the fingerboard is provided.

  The fingerboard 10 further includes a detection system 20 configured to detect a fret where one of the strings 12a-12f is pressed so that a played chord or note can be detected.

  The detection system 20 includes at least one conductor 22 that extends along the length of the fingerboard 10 and connects to each of the frets 14a-14f. The conductor 22 can be mounted inside or provided on the substrate 11.

  As shown in FIGS. 1 and 2, the detection system 20 has a fingerboard 10 so that each of the frets 14a-14f is connected to the first conductor 22 at one end and to the other conductor 22a at the other end. The conductor 22 or two conductors 22 and 22a provided at the end of the conductor 22 are included. The advantages of providing more than one conductor will be described later.

  The detection system 20 further includes a converter 23 (also known as NOT logic). The converter 23 has an input terminal 24a and an output terminal 24b, and is configured to output a voltage representing a logic level opposite to the voltage of the input terminal 24a at the output terminal 24b. That is, when the input voltage corresponds to logic 1, the output voltage of the converter corresponds to logic 0 and vice versa. The converter can be NC7SZ14 or the like or a similar known converter or inverting amplifier.

  The input terminal 24a of the converter 23 is connected to the conductors 22 and 22a so that the electrical signals from the conductors 22 and 22a can be logically converted by the converter 23. The output terminal 24b of the converter 23 can be connected to the strings 12a-12f so that the converted signal can be transmitted to the strings 12a-12f. Since it is desirable to detect the frets where the strings are pressed and which of the strings 12a-12f is pressed, each of the strings 12a-12f is a transducer individually and independently. 23 can be connected. This can be achieved, for example, by connecting the strings 12a-12f to the output terminal 24b of the converter 23 by a demultiplexer 30 (also known as demux). The demultiplexer 30 is configured to receive an input signal from the output terminal 24b of the converter 23, and an output unit configured to select one of a number of data output lines 34a-34f. 32b, and each of the data output lines is connected to one end of the strings 12a-12f.

  The demultiplexer 30 can be configured to supply a cycle of instances such that during each instance, its output 32b connects to only one of the data output lines 34a-34f. The output section 32b can be configured to continuously select one of the data output lines 34a-34f such that each of the data output lines 34a-34f continuously receives a signal from the converter 23. . Since each of the data output lines 34a-34f is connected to one of the conductive strings 12a-12f, the conductive strings 12a-12f are connected to the transducer 23 one at a time by the operation of the demultiplexer 30. Continuously connected to the output terminal 24b, the output signal can be transmitted through it.

  Alternatively, the output terminal 24b of the converter 23 can be connected to the strings 12a-12f through an analog switch such as MAX459x.

  The detection system 20 further includes a frequency detector configured to measure the frequency of the signal at the output terminal 24b and a controller that details its purpose below. The frequency detector and the control device can be mounted on the CPU module 35 connected to the output terminal 24b of the converter 23. Since the conductive strings 12a-12f, the conductor 22 and the transducer 23 together form an electrical circuit, the frequency detector can be at any location, ie, at the output terminal 24b, the input terminal 24a, or conductive. It can be connected to the body 22, 22a.

  The detection system further comprises a power source (not shown) for generating an electrical signal. The power source transmits electrical signals through the conductive strings 12a-12f when the detection system is activated.

  As described above, the frets 14a-14f are made of a conductive material, so that pressing the conductive strings 12a-12f against one of the frets 14a-14f causes the individual conductive strings, conductors It becomes easier to close the circuit formed by 22 and the converter 23. For example, when the conductive string 12f is pressed against the fret 14e, the circuit is closed and the output signal is output from the output terminal 24b of the transducer 23 to the demultiplexer 30, the conductive string 12f, the fret 14e and the conductor. 22 to the input terminal 24a. When the voltage of the output signal corresponds to logic 0, the voltage transmitted back to the input terminal 24a through the conductive string 12f and the conductor 22 corresponds to logic 0. The converter 23 outputs an output signal having a voltage corresponding to logic 1 as a response.

Furthermore, the transmission of the output signal through the conductive string 12f, fret 14e and conductor 22 provides a voltage corresponding to a logic 1 at the input terminal 24a, which in turn corresponds to a logic 1 by the converter 23. It is converted to a voltage at the output terminal.
Transmission of the output signal between the output terminal 24b and the input terminal 24a continues while the conductive string 12f is pressed against the fret 14e. Therefore, the signal transmitted through the conductive string 12f alternates between logic 1 and logic 1.

  As shown in the graph of FIG. 3, the output signal is generally represented by a square wave represented by 50, the first phase 52a with a voltage corresponding to logic 0 and the second with a voltage corresponding to logic 1. Phases 52b occur alternately.

  The interchange between the first phase 52a and the second phase 52b occurs at a frequency depending on the time interval between the conversion of the converter 23 and the next conversion. Since the conversion occurs continuously when the current completes a complete cycle between the output terminal 24b and the input terminal 24a, the time interval between each conversion is such that the output signal 50 is transmitted from the output terminal 24b and the converter 23 It is determined by the time required to return to the input terminal 24a.

  Therefore, the frequency of wave 50, ie, the amount of the number of times phase 52a and phase 52b change within a given time unit, depends on the distance between input terminal 24a and the fret against which the conductive string is pressed. Change. That is, when the conductive string 12f is pressed against the fret 14e, the distance that the output signal is transmitted is shorter than the transmission distance when the conductive string 12f is pressed against the fret 14f. Thus, the frequency of the signal formed when the conductive string 12f is pressed against the fret 14e is the frequency of the signal formed when the conductive string 12f is pressed against the fret 14f. Greater than frequency.

  Since the output signal is transmitted through the conductive string 12f and returned through the conductor 22, the actual transmission distance between the output terminal 24b and the input terminal 24a is between the transducer 23 and the fret where the string is pressed. About twice the distance.

  The CPU module 35 includes a frequency detector that measures the frequency of a wave generated by alternating signals, and can detect a change in frequency resulting from a change in signal transmission distance. The change is caused by a change in the frets 14a-14f that press the strings 12a-12f. Thus, the CPU module 35 is configured to determine which fret is pressed by the conductive string according to the detected frequency.

Therefore, each fret defines a specific distance (d) from the transducer 23 so that the pressure of the string 12a-12f against one of the frets 14a-14f can be detected. The detection of the fret pressed by the conductive string can be performed on any of the strings 12a-12f. However, since each of the strings 12a-12f is located at a different distance from the conductor 22, this different distance can affect the frequency of the signal transmitted through the string. Therefore, as described above, the fingerboard 10 can include two conductors 22 and 22a that are arranged along the outer longitudinal end of the fingerboard 10 and merge at the input terminal 24a. The two conductors 22, 22a are conductive strings 12a so that the average distance from each of the conductive strings 12a-12f to the two conductors is equal for all of the conductive strings. Arranged for each of -12f. Thus, the two conductors 22, 22a provide an averaged signal, thereby accurately detecting frequency changes resulting from changing the distance between the transducer 23 and the frets pressed by the strings. To make it easier.

  In another embodiment, a single conductor 22 can be used. However, the CPU can be configured to detect the pressed string and thereby calculate the frequency taking into account the distance between the string and the conductor 22. Detecting the pressed string can be performed, for example, by receiving feedback from a pressure detector or demultiplexer 30. That is, the signal is transmitted to the input terminal 24a only when the demultiplexer 30 is connected to the pressed conductive string. In this way, the demultiplexer 30 can supply the CPU with data about the pressed string, so that it is pressed according to the frequency of the signal taking into account the distance between the string and the conductor 22. Frets can be detected.

  The transducer 23, demultiplexer 30, CPU, or any other electronic component can be placed anywhere on the stringed instrument. For example, these electronic components can be mounted on a module that can be connected to a stringed instrument via, for example, a dedicated interface of the stringed instrument. In this way, the module can be connected to a stringed instrument when the user wishes to receive an indication regarding played notes and chords.

  FIG. 2 is a block diagram of a fingerboard 60 and detection system 70 according to another embodiment of the present invention. Fingerboard 60 is substantially the same as fingerboard 10 of FIG. 1 and includes a plurality of conductive strings 62a-62f and a plurality of frets 64a-64f connected to one or more conductors 68, 68a. Similarly, the detection system 70 is substantially the same as the detection system 20 of FIG. 1 and is configured to select one of an input terminal 74a, an output terminal 74b, and a number of data output lines 84a-84f. A converter 73 having a multiplexer 80 is included, each of the lines connecting to one of the conductive strings 62a-62f.

  In this embodiment, the detection system 70 further includes a capacitor 78 connected to the input terminal 74 a of the converter 73. Capacitor 78 is configured to apply a signal transmitted through conductors 68, 68a to the capacitor, which in turn applies to the conductor, thus forming a resonance therebetween. The resonance is in the form of an electrical vibration formed by the interaction between a conductive string pressed against one of capacitor 78, conductor 68 and frets 64a-64f. The electrical vibration is attenuated by the resistance of the conductors 68, 68a and the conductive strings 62a-62f, after which the signal reaches the input terminal 74a of the transducer 73. When the signal is input to the converter 73, the signal is converted. For example, if the signal at input terminal 74a is a voltage corresponding to a logic 1, converter 73 converts the signal to its opposite logic level, ie, logic 0, as described above with respect to FIGS.

  Similar vibrations occur when a voltage corresponding to logic 0 is transmitted through the conductive string and conductor 68. The electrical vibration is attenuated, after which the logic 0 signal reaches the input terminal 74a of the converter 73 which is converted to logic 1.

  In this way, as shown in the graph of FIG. 4, the signal can be represented by a rectangular wave with 90 as a whole, the first phase 92a whose voltage corresponds to logic 0 and its voltage is logic 1 Alternately occur with the second phase 92b corresponding to. Each of the first phase 92a and the second phase 92b includes a decay time represented by T, and at each wavelength the oscillation is twice, ie, the first in the logic 0 phase and the logic 1 phase. Since the second time occurs, the wavelength of the signal is increased by 2T. Thereby, a signal having a large wavelength, that is, a signal having a low frequency is obtained, and as a result, it is easy to detect a change in a small frequency.

  In other embodiments, the detection system may include other electronic components that delay the signal and thereby increase the wavelength, such as serial inductors or delay lines.

  Those skilled in the art of the subject matter disclosed herein will readily appreciate numerous changes, variations, and modifications that do not exceed the scope of the invention by making the necessary changes.

Claims (15)

  1. A detection system for detecting notes played on a stringed instrument having a fingerboard, wherein the fingerboard includes a plurality of conductive frets and at least one conductive string extending along the conductive frets. The detection system comprises:
    At least one conductor connected to each of the frets;
    A converter having a first terminal connected to the conductor and a second terminal connected to the at least one conductive string, wherein the converter logically converts a transmitted signal. When the conductive string is pressed against one of the frets and a signal is transmitted through the conductive string, the signal is transmitted to the transducer and the fret. A converter that is continuously converted between two logic states at a frequency depending on the distance between
    A frequency detector configured to measure the frequency;
    A controller configured to determine a position of the fret along the fingerboard according to the frequency and thereby detect the notes;
    A detection system comprising:
  2. The transducer is configured to select one of a number of data output lines, each of the data output lines being one of a musical instrument having a plurality of conductive strings extending along the fingerboard. The detection system of claim 1 , wherein the detection system is configured to connect to a conductive string.
  3. And a demultiplexer, the demultiplexer having an input configured to receive an input signal from the converter and an output configured to select one of a number of data output lines. The detection system according to claim 2 , wherein each of the data output lines is connected to one of the plurality of conductive strings.
  4. Wherein the first terminal of the transducer is an input terminal, said second terminal Ri Ah at the output terminal, said converter further converts the output voltage corresponding to input voltage corresponding to logic 1 to logic 0 The detection system of claim 1, configured to:
  5. Wherein any plurality of conductive of strings, further comprises a configured control device to detect whether it is pressed against one of said plurality of frets, detection system according to claim 1.
  6. And further comprising a capacitor connected to the converter to form a signal resonance in the signal, thereby delaying the signal to delay the signal and increasing the wavelength of the signal. The detection system according to claim 1 , which is configured.
  7. And a demultiplexer, the demultiplexer having an input configured to receive an input signal from the converter and an output configured to select one of a number of data output lines. The detection system according to claim 1 , wherein each of the data output lines is connected to one of the plurality of conductive strings.
  8. The transducer is configured to select one of a number of data output lines, each of the data output lines being one of a musical instrument having a plurality of conductive strings extending along the fingerboard. The detection system of claim 1 , wherein the detection system is configured to connect to a conductive string.
  9. And a demultiplexer, the demultiplexer having an input configured to receive an input signal from the converter and an output configured to select one of a number of data output lines. 9. The detection system according to claim 8 , wherein each of the data output lines is connected to one of the plurality of conductive strings.
  10. Wherein any plurality of conductive of strings, further comprises a configured control device to detect whether it is pressed against one of said plurality of frets, detection system according to claim 1.
  11. Forming a signal resonance to the signal, thereby, the signal is delayed, further comprising a capacitor configured to increase the wavelength of the signal, the detection system of claim 1.
  12. The at least one conductor includes two conductors, and the two conductors have an average distance from each of the plurality of conductive strings to the two conductors of the plurality of conductive strings. The detection system according to claim 1, wherein the detection system is arranged with respect to each of the plurality of conductive strings to be equal to all .
  13. A method for detecting a note played on a stringed instrument having a fingerboard, wherein the fingerboard extends along the length of the fingerboard and a plurality of conductive frets each connected to a conductor. Comprising at least one conductive string, the method comprising:
    Generating an electrical signal through the conductive string, wherein the signal can be transmitted through one of the frets when the conductive string is pressed against the fret;
    Logically converting the signal by a transducer, the transducer having a first terminal connected to the conductor and a second terminal connected to the conductive string; When the conductive string is pressed against one of the frets and the signal is transmitted through the conductor, the signal depends on the distance between the transducer and the fret Being continuously converted between two logic states in frequency,
    Detecting the frequency with a frequency detector;
    Calculating the position of the fret along the fingerboard according to the frequency;
    Determining the notes to be played on the instrument according to the position;
    Including a method.
  14. A fingerboard for a stringed instrument combined with a detection system, wherein the fingerboard includes a plurality of conductive frets disposed at various positions along a length, and an upper surface of the frets along the length of the fingerboard. And at least one conductive string extending from and spaced from the fret, the detection system comprising:
    A conductor disposed along the length of the fingerboard connected to each of the frets;
    A converter having a first terminal connected to the conductor and a second terminal connected to the at least one conductive string, wherein the converter logically converts a transmitted signal. The signal is transmitted when the at least one conductive string is pressed against one of the frets so that a signal can be transmitted through the conductive string. A transducer that is continuously converted between two logic states at a frequency depending on the distance between the vessel and the fret;
    A frequency detector for measuring the frequency;
    A control device for determining the position of the fret along the fingerboard according to the frequency;
    Comprising a fingerboard.
  15. 15. The combination of claim 14, wherein the conductive string is configured to receive a signal from the transducer and is configured to transmit a low voltage current that is unaffected by a user's finger.
JP2017500469A 2014-03-18 2015-03-09 Stringed instrument detection system Active JP6338313B2 (en)

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US201461954937P true 2014-03-18 2014-03-18
US61/954,937 2014-03-18
PCT/IL2015/050244 WO2015140783A1 (en) 2014-03-18 2015-03-09 A detecting system for a string instrument

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US9858909B2 (en) * 2014-03-18 2018-01-02 O.M.B. Guitars Ltd Detecting system for a string instrument

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US3340343A (en) * 1964-05-06 1967-09-05 Baldwin Co D H Stringless guitar-like electronic musical instrument
US3902395A (en) * 1973-10-11 1975-09-02 William L Avant Stringed musical instrument with electronic time division multiplexing circuitry
US3871247A (en) * 1973-12-12 1975-03-18 Arthur R Bonham Musical instrument employing time division multiplexing techniques to control a second musical instrument
US4336734A (en) * 1980-06-09 1982-06-29 Polson Robert D Digital high speed guitar synthesizer
US4630520A (en) * 1984-11-08 1986-12-23 Carmine Bonanno Guitar controller for a music synthesizer
JPH0658597B2 (en) * 1987-04-22 1994-08-03 ヤマハ株式会社 Electronic stringed instrument
JP2615825B2 (en) * 1988-05-02 1997-06-04 カシオ計算機株式会社 Electronic string instrument
US6271457B1 (en) * 2000-05-19 2001-08-07 Kaman Music Corporation Piezoelectric bridge-type pickup for a stringed musical instrument
US8901409B2 (en) * 2012-03-22 2014-12-02 Marcus Gustaf Helgesson Stringed musical instrument with string activated light emitting members

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JP2017509032A (en) 2017-03-30
ES2637856T3 (en) 2017-10-17
CA2945916A1 (en) 2015-09-24
EP2959472A4 (en) 2016-08-03
EP2959472B1 (en) 2017-05-17
EP2959472A1 (en) 2015-12-30
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AU2015232959B2 (en) 2020-03-19
CN106104671A (en) 2016-11-09
PL2959472T3 (en) 2017-11-30
AU2015232959A1 (en) 2016-09-29

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