CN105489207A - String instrument tuning device and method, mobile terminal and mobile terminal tuning method - Google Patents
String instrument tuning device and method, mobile terminal and mobile terminal tuning method Download PDFInfo
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- CN105489207A CN105489207A CN201510822863.1A CN201510822863A CN105489207A CN 105489207 A CN105489207 A CN 105489207A CN 201510822863 A CN201510822863 A CN 201510822863A CN 105489207 A CN105489207 A CN 105489207A
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- musical instrument
- sound signal
- stringed musical
- stringed
- module
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
- G10H3/181—Details of pick-up assemblies
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
- G10H3/186—Means for processing the signal picked up from the strings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
The invention provides a string instrument tuning device and a tuning method thereof, a mobile terminal comprising the string instrument tuning device, and a mobile terminal tuning method, wherein the string instrument tuning device comprises a pickup circuit and an audio processor that are connected with each other, the pickup circuit is used for acquiring audio signals transmitted by a string instrument; the audio processor receives the audio signals transmitted by the pickup circuit and processes the audio signals prior to comparing frequency of the signals with preset frequency, thus correcting the audio signals transmitted by the string instrument. During tuning, whether strings of the string instrument are too loose or tight can be precisely judged until tuning is complete just by determining whether the frequency of the processed audio signals is equal to the preset frequency, tuning operation is simple, and precise tuning of the string instrument can be achieved.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of stringed musical instrument chord regulating device and method of tuning a stringed instrument thereof, also relate to and a kind ofly comprise the mobile terminal of this stringed musical instrument chord regulating device and method of tuning a stringed instrument thereof.
Background technology
Tuning a stringed instrument is the corresponding tone needed when being played by each bar string furnishing of stringed musical instrument, is equivalent to the calibration process of stringed musical instrument.In general, stringed musical instrument before the use, all needs to carry out tuning correction to it, makes it be in optimum condition.
Traditional stringed musical instrument, the chord regulating device as contrabass is made up of underframe and peg, and peg establishes string, and in general, it regulates string by the handle rotated in peg, although this chord regulating device is simple to operate, accurate not.
Certainly, for the problems referred to above, also someone proposes solution, as, application number is the Chinese patent of 201210021517.X, which proposes a kind of stringed musical instrument chord regulating device, although it reduces because tune a stringed instrument on the impact of player to a certain extent, improve the effect of chord regulating device, but do not tackle the problem at its root.And this chord regulating device is very high to the requirement of player, especially concerning stringed musical instrument beginner, wants to carry out accurate tuning correction difficulty very by similar this chord regulating device, and expend time in.
Summary of the invention
For the problems referred to above, the present invention aim to provide a kind of stringed musical instrument chord regulating device and tune a stringed instrument method and a kind of comprise this stringed musical instrument chord regulating device mobile terminal and mobile terminal to tune a stringed instrument method, it realizes accurately tuning a stringed instrument of stringed musical instrument by the mode of hardware circuit, simple to operate.
Technical scheme provided by the invention is as follows:
A kind of stringed musical instrument chord regulating device, comprises interconnective pickup circuit and audio process;
The sound signal that described pickup circuit sends for obtaining described stringed musical instrument;
Described audio process receives the described sound signal that described pickup circuit sends, and its frequency and predeterminated frequency is compared after processing described sound signal, to realize the calibration to the described sound signal that described stringed musical instrument sends.
We know, the process that stringed musical instrument is tuned a stringed instrument is actually the frequency that calibration stringed musical instrument string sends, in the technical program, by this stringed musical instrument chord regulating device of stringed musical instrument outside, compared by the frequency of sound signal that stringed musical instrument is sent and predeterminated frequency and realize object.Like this, in the process of tuning a stringed instrument, as long as constantly adjust string knob according to this comparative result, until the frequency of sound signal that string sends is identical with predeterminated frequency, namely achieve the calibration of this stringed musical instrument.Like this, in this process, no longer need to go to judge whether string is calibrated by the experience of player, substantially increase the degree of accuracy of tuning a stringed instrument, and it is simple to use very.Especially for beginner, it can be helped to carry out operation of tuning a stringed instrument accurately fast.
Further preferably, described pickup circuit comprises: a microphone, the first inductance, the second inductance, the first voltage stabilizer, the second voltage stabilizer, the first direct earth capacitance, the second direct earth capacitance and connect electric capacity, wherein, one end of described first inductance is connected with the positive output end of described microphone, and one end of described second inductance is connected with the negative output terminal of described microphone; The other end of described first inductance connects with one end of one end of described first voltage stabilizer, described first direct earth capacitance, the positive output end of described one end and described pickup circuit of being connected electric capacity respectively; The other end of described second inductance connects with the ground connection output terminal of one end of described second voltage stabilizer, one end of described second direct earth capacitance and the described other end and described pickup circuit that are connected electric capacity respectively; The other end of the other end of described first electric capacity, the other end of described second electric capacity, described first voltage stabilizer and the other end of described second voltage stabilizer ground connection respectively.
In the technical program, obtain by above-mentioned pickup circuit the sound signal that stringed musical instrument sends, and to be conveyed into complete for the sound signal got in filtering circuit or audio process by cooperatively interacting between its each electron device comprised.
Further preferably, also comprise a reserved resistance in described pickup circuit, one end of described reserved resistance is connected with the negative output terminal of described microphone, the other end ground connection of described reserved resistance.
In the technical program, this reserved resistance is actually an alternate resistance, if the pickup circuit namely in last technical scheme can realize object of the present invention, then in pickup circuit, does not add this reserved resistance.
Further preferably, a filtering circuit is also comprised in described stringed musical instrument chord regulating device, described filtering circuit is connected with described pickup circuit and described audio process respectively, and described filtering circuit carries out filtering to described sound signal and the sound signal after filtering is sent to described audio process.
We know, various noise signal is inevitably introduced in the sound signal obtained by pickup circuit, as the noise signal etc. in people's one's voice in speech signal, environment, thus in order to improve the degree of accuracy of the stringed musical instrument chord regulating device that the technical program provides, we are provided with filtering circuit, before use audio process processes it, first carry out filtering to sound signal.
Further preferably, described filtering circuit comprises: the first filter inductance, the second filter inductance, the first filter capacitor and the second filter capacitor, wherein,
One end of described first filter inductance is connected with the positive output end of described pickup circuit, and the other end of described first filter inductance is connected with one end of described second filter inductance and one end of described first filter capacitor respectively; The other end of described second filter inductance is connected with one end of described second filter capacitor and the positive input terminal of described audio process respectively; The other end of described first filter capacitor and the other end of described second filter capacitor ground connection respectively.
In the technical program, adjusting this filtering circuit by the value adjusting the first filter inductance, the second filter inductance, the first filter capacitor and the second filter capacitor can the wave band of filtering, to meet the different demands in practical application.
Further preferably, described audio process comprises: control module, memory module, signal receiving module, D/A converter module and comparison module;
Described memory module, is connected with described control module, and described memory module prestores described predeterminated frequency under the control of described control module;
Described signal receiving module, is connected with described control module, and described signal receiving module receives the sound signal that described pickup circuit sends under the control of described control module, or receives the filtered sound signal of described filtering circuit transmission;
Described D/A converter module, is connected with described control module, and the sound signal that described pickup circuit sends by described D/A converter module under the control of described control module or the filtered sound signal that described filtering circuit sends are converted to digital signal;
Described comparison module, is connected with described control module, and the frequency of the described digital signal that described D/A converter module sends by described comparison module and described predeterminated frequency compare.
Further preferably, in described stringed musical instrument chord regulating device, also comprise the display module be connected with described audio process, for showing the comparative result of comparison module described in described audio process;
And/or,
The load module be connected with described audio process is also comprised, for inputting described predeterminated frequency in described stringed musical instrument chord regulating device.
In the technical program, the operation of tuning a stringed instrument that can have been known whether by the display result of checking in display module, very clear.
A kind of mobile terminal comprising above-mentioned stringed musical instrument chord regulating device.
In the technical program, the keyboard comprised by mobile terminal or dummy keyboard input predeterminated frequency, by the display screen display comparative result in mobile terminal.
A kind of stringed musical instrument is tuned a stringed instrument method, comprises the following steps:
S1 obtains the sound signal that stringed musical instrument sends;
S2 processes described sound signal;
The frequency of the sound signal after process and predeterminated frequency compare, to realize the calibration to described sound signal by S3.
Further preferably,
Specifically comprise in step s 2: described sound signal is carried out digital-to-analog conversion and becomes digital signal;
Or,
Specifically comprise in step s 2:
S21 carries out filtering to described sound signal;
S22 converts the sound signal after filtering to digital signal.
Further preferably, after step s 3, also comprise:
Comparative result in S4 step display S3.
A kind of tune a stringed instrument mobile terminal of method of above-mentioned stringed musical instrument that uses is tuned a stringed instrument method.
Stringed musical instrument chord regulating device provided by the invention and the method and comprise the mobile terminal of this stringed musical instrument chord regulating device and mobile terminal and to tune a stringed instrument method of tuning a stringed instrument thereof, following beneficial effect can be brought:
At stringed musical instrument chord regulating device provided by the invention and tune a stringed instrument in method, first obtain the sound signal that sends of stringed musical instrument by pickup circuit, by audio process it processes and the frequency of the sound signal after process and predeterminated frequency are compared subsequently and realize object.Like this, in the process of tuning a stringed instrument, only need whether the frequency of the sound signal after seeing this process and predeterminated frequency be identical just to judge that the string of stringed musical instrument has been pine or tight accurately, until operation of tuning a stringed instrument completes, it is simple to operate and can realize accurately tuning a stringed instrument of stringed musical instrument.Especially not the stringed musical instrument beginner so enriched for experience, using this stringed musical instrument chord regulating device no longer to need to worry to affect because of tuning a stringed instrument inaccurate the sound quality problem playing out.
In order to improve the degree of accuracy of tuning a stringed instrument further, in this stringed musical instrument chord regulating device, be also provided with filtering circuit, by the noise signal elimination may introduced in pickup process.The more important thing is, in this filtering circuit can by comprising inductance and electric capacity give different values and adjust its frequency filtering, with the demand of satisfied different stringed musical instrument, very flexible.
In addition, this stringed musical instrument chord regulating device is carried in order to player can be facilitated, this stringed musical instrument chord regulating device installs additional in the terminal by we, therefore, the mobile terminal comprising this stringed musical instrument chord regulating device also provided in the present invention and mobile terminal are tuned a stringed instrument method, it is to a great extent for player provides convenient, in order to avoid occur that player leaves behind the situation of this stringed musical instrument chord regulating device.
Accompanying drawing explanation
Below by clearly understandable mode, accompanying drawings preferred implementation, is further described above-mentioned characteristic, technical characteristic, advantage and implementation thereof.
Fig. 1 is the structural representation of the first embodiment of stringed musical instrument chord regulating device in the present invention;
Fig. 2 is the structural representation of stringed musical instrument chord regulating device the second embodiment in the present invention;
Fig. 3 is the circuit diagram of a kind of embodiment of pickup circuit in the present invention;
Fig. 4 is the circuit diagram of the another kind of embodiment of pickup circuit in the present invention;
Fig. 5 is filtering circuit figure in the present invention;
Fig. 6 is the structural representation of sound intermediate frequency processor of the present invention;
Fig. 7 is the structural representation that in the present invention, stringed musical instrument chord regulating device comprises the embodiment of display module;
Fig. 8 is the structural representation that in the present invention, stringed musical instrument chord regulating device comprises the embodiment of load module;
Fig. 9 is the structural representation of the embodiment simultaneously comprising display module and load module in the present invention in stringed musical instrument chord regulating device;
Figure 10 is the structural representation of mobile terminal in the present invention;
Figure 11 is that in the present invention, stringed musical instrument is tuned a stringed instrument the schematic flow sheet of a kind of embodiment of method;
Figure 12 is that in the present invention, stringed musical instrument is tuned a stringed instrument the schematic flow sheet of the another kind of embodiment of method.
Drawing reference numeral illustrates:
10-pickup circuit, 20-audio process, 30-filtering circuit, 21-control module, 22-memory module, 23-signal receiving module, 24-D/A converter module, 25-comparison module, 40-display module, 50-load module;
M-microphone, L1-first inductance, L2-second inductance, W1-first voltage stabilizer, W2-second voltage stabilizer, C1-first direct earth capacitance, C2-second direct earth capacitance, C3-connects electric capacity, R1-reserves resistance, L3-first filter inductance, L4-second filter inductance, C4-first filter capacitor, C5-second filter capacitor.
Embodiment
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, contrast accompanying drawing is illustrated the specific embodiment of the present invention below.Apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, and obtain other embodiment.
Be illustrated in figure 1 the structural representation of the first embodiment of stringed musical instrument chord regulating device provided by the invention, as can be seen from the figure, comprise interconnective pickup circuit 10 and audio process 20 at this stringed musical instrument chord regulating device.In the course of the work, first, pickup circuit 10 obtains the sound signal that stringed musical instrument sends, and is sent in audio process 20 by this sound signal; After audio process 20 receives this sound signal, immediately its sound signal is processed, then the frequency of the sound signal after process and predeterminated frequency are compared.Specifically, if the frequency of sound signal after process is identical with predeterminated frequency, then the operation of tuning a stringed instrument that completes stringed musical instrument of explanation.Corresponding, if the frequency of sound signal after process is less than predeterminated frequency, then the string pine of stringed musical instrument is described, then it suitably screws by the knob of tuning a stringed instrument transferring stringed musical instrument; If the frequency of the sound signal after process is greater than predeterminated frequency, then illustrate that the string of stringed musical instrument is tight, then it suitably unscrews by the knob of tuning a stringed instrument transferring stringed musical instrument; Repeatedly adjust with this, until string to be transferred to standard pronunciation (frequency that string sends is identical with predeterminated frequency).
We know that the sound signal that pickup circuit 10 obtains is simulating signal, therefore in audio process 20, need to convert thereof into digital signal its frequency and predeterminated frequency could be compared, thus in audio process 20, the process of sound signal is at least comprised and the sound signal received from pickup circuit 10 is carried out digital-to-analog conversion.In a particular embodiment, above-mentioned audio process 20 is DSP (DigitalSignalProcess, Digital Signal Processing) chip, certainly can also use other forms of process chip, as long as the object that can realize present embodiment is all included within the scope of it.
Improvement is carried out to above-mentioned first embodiment and obtains the second embodiment, as shown in Figure 2, as seen from the figure, in this embodiment, in stringed musical instrument chord regulating device except comprising pickup circuit 10 and audio process 20, also comprise a filtering circuit 30, and this filtering circuit 30 is connected with pickup circuit 10 and audio process 20 respectively.In the course of the work, pickup circuit 10 sends it to immediately in filtering circuit 30 after obtaining the sound signal that stringed musical instrument sends and carries out filtering; Sound signal after filtering to be sent in audio process 20 after completing filtering and to carry out respective handling and comparison by filtering circuit 30.We know, when dialling the string of (drawing) dynamic stringed musical instrument, it can send the vibration of at least one frequency usually.As, when stirring certain root string of guitar, it can produce frequency range simultaneously and drop on the sound signal that the sound signal of 100Hz (hertz) ~ 300Hz (promoting the richness increasing tone color) and frequency range drop on 2kHz (KHz) ~ 5kHz (promoting the expressive force strengthening tone color), and these two sound signals superpose the frequency range of the string obtaining this guitar mutually.Therefore the ripple of the frequency outside the frequency needing use filtering circuit 30 filtering stringed musical instrument to send, comprises in environment the various noise signals that may occur, the various noise signals that artificially may send is waited for.In a particular embodiment, above-mentioned filtering circuit 30 can select existing wave filter or designed, designed according to frequency filtering, as long as can realize object.
Based on the description to above two kinds of embodiments, be illustrated in figure 3 the circuit diagram of pickup circuit 10 1 kinds of embodiments, comprise at this circuit diagram: microphone M, the first inductance L 1, second inductance L 2, first voltage stabilizer W1, the second voltage stabilizer W2, the first direct earth capacitance C1, the second direct earth capacitance C2 and connect electric capacity C3, wherein, one end of first inductance L 1 and the positive output end of microphone M+be connected, one end of the second inductance L 2 and the negative output terminal of microphone M-be connected; The other end of the first inductance L 1 connects with the positive output end Output+ of one end of the first voltage stabilizer W1, one end of the first direct earth capacitance C1, the one end being connected electric capacity C3 and pickup circuit respectively; The other end of the second inductance L 2 connects with the ground connection output terminal Output-of one end of the second voltage stabilizer W2, one end of the second direct earth capacitance C2 and the other end and pickup circuit that are connected electric capacity C3 respectively; The other end of the other end of the first electric capacity C1, the other end of the second electric capacity C2, the first voltage stabilizer W1 and the other end of the second voltage stabilizer W2 ground connection respectively.In the course of the work, microphone collected the signal that string sends after by each electron device in pickup circuit 10 with ensure the signal that collects can complete (undistorted lossless) be transferred in follow-up audio process 20 or filtering circuit 30, model as each device can be selected according to actual conditions, as the first direct earth capacitance C1, the second direct earth capacitance C2 and connect electric capacity C3 and all select capacity to be the electric capacity etc. of 33pF (pico farad).
Be illustrated in figure 4 another kind of embodiment circuit diagram in pickup circuit 10, as can be seen from the figure, on basis based on the pickup circuit 10 shown in Fig. 3, a reserved resistance R1 is further comprises, one end of this reserved resistance R1 and the negative output terminal of microphone M-be connected, other end ground connection in this pickup circuit 10.In this embodiment, reserved resistance is here actually an alternate resistance, if the pickup circuit 10 namely shown in Fig. 3 can realize object of the present invention, then in pickup circuit 10, does not add this reserved resistance; On the contrary, then add this reserved resistance R1, realize the adjustment to pickup circuit 10, specifically the resistance of this reserved resistance R1 can set according to actual conditions.
Further, based on the above description to the second embodiment, as shown in Figure 5, specifically comprise in this filtering circuit 30: the first filter inductance L3, the second filter inductance L4, the first filter capacitor C4 and the second filter capacitor C5, wherein, one end (the input end Input1 of filtering circuit) of first filter inductance L3 is connected with the positive output end Output+ of pickup circuit, and the other end of the first filter inductance L3 is connected with one end of the second filter inductance L4 and one end of the first filter capacitor C4 respectively; The other end (the input end Onput1 of filtering circuit) of the second filter inductance L4 is connected with one end of the second filter capacitor C5 and the positive input terminal of audio process respectively; The other end of the first filter capacitor C4 and the other end of the second filter capacitor C5 ground connection respectively.In this embodiment, regulate this filtering circuit 30 can the wave frequency of filtering especially by the different inductance value of tax first filter inductance L3, the second filter inductance L4, the first filter capacitor C4 and the second filter capacitor C5 and capacitance.
Above embodiment is improved, obtain present embodiment, as shown in Figure 6, specifically comprise in audio process 20 in this embodiment: control module 21, memory module 22, signal receiving module 23, D/A converter module 24 and comparison module 25, and memory module 22, signal receiving module 23, D/A converter module 24 are connected with control module 21 respectively with comparison module 25.Before the course of work, input this predeterminated frequency in this chord regulating device, now, this predeterminated frequency stores by control module 21 control store module 22, calls in order to follow-up.In the course of the work, first, control module 21 control signal receiver module 23 receives the sound signal sent from pickup circuit 10 or the filtered sound signal received from filtering circuit 30 transmission; Subsequently, control module 21 controls D/A converter module 24 and the sound signal received or filtered sound signal is converted to corresponding digital signal; Finally, control module 21 controls comparison module 25 and is compared by the predeterminated frequency stored in the frequency of this digital signal and memory module 22.With describe in a first embodiment identical, in this embodiment, if the frequency of digital signal is identical with predeterminated frequency, then the operation of tuning a stringed instrument that completes stringed musical instrument is described.Corresponding, if the frequency of digital signal is less than predeterminated frequency, then the string pine of stringed musical instrument is described, then it suitably screws by the knob of tuning a stringed instrument transferring stringed musical instrument; If the frequency of digital signal is greater than predeterminated frequency, then illustrate that the string of stringed musical instrument is tight, then it suitably unscrews by the knob of tuning a stringed instrument transferring stringed musical instrument; Repeatedly adjust with this, until string is transferred to standard pronunciation.
Above embodiment is improved and obtains new embodiment, as shown in Figure 7, in this embodiment, in stringed musical instrument chord regulating device except comprising above-mentioned pickup circuit 10, audio process 20 and filtering circuit 30, also comprise and be connected display module 40 with audio process 20, for showing the comparative result of comparison module 25 in audio process 20.Like this, whether player completes by seeing of the intuitive display in display module 40 operation of tuning a stringed instrument in the process of tuning a stringed instrument.In a particular embodiment, this display module 40 can be but be not limited to LCDs etc.
Above embodiment is improved and obtains new embodiment, as shown in Figure 8, in this embodiment, in stringed musical instrument chord regulating device except comprising above-mentioned pickup circuit 10, audio process 20 and filtering circuit 30, also comprise in stringed musical instrument chord regulating device and be connected load module 50 with audio process 20, for inputting predeterminated frequency.In a particular embodiment, this load module 50 can be but be not limited to input keyboard or realize object by the dummy keyboard in display screen.Above embodiment is improved and obtains new embodiment, as shown in Figure 9, in this embodiment, in stringed musical instrument chord regulating device except comprising above-mentioned pickup circuit 10, audio process 20 and filtering circuit 30, also comprise and be connected display module 40 and load module 50 with audio process 20 respectively.Wherein, display module 40 is for showing the comparative result of comparison module 25 in audio process 20, and load module 50 is for inputting predeterminated frequency.
As shown in Figure 10, a kind of mobile terminal 100 is additionally provided in the present invention, above-mentioned stringed musical instrument chord regulating device is comprised at this mobile terminal 100, and specifically comprise in this stringed musical instrument chord regulating device: pickup circuit 10, audio process 20 and filtering circuit 30, wherein, pickup circuit 10 is connected with filtering circuit 30, and filtering circuit 30 territory audio process 20 connects.In the course of the work, pickup circuit 10 sends it to immediately in filtering circuit 30 after obtaining the sound signal that stringed musical instrument sends and carries out filtering; Sound signal after filtering to be sent in audio process 20 after completing filtering and to carry out respective handling and comparison by filtering circuit 30.More particularly, above-mentioned pickup circuit 10 is specially as Fig. 3 or circuit as shown in Figure 4, and filtering circuit 30 is specially circuit as shown in Figure 5, and audio process 20 is specially dsp chip, and it is inner specifically as shown in Figure 6, does not repeat at this.With in above-mentioned stringed musical instrument chord regulating device unlike, do not need to add display module 40 or load module 50 in addition in the stringed musical instrument chord regulating device that this mobile terminal 100 comprises, directly use existing display screen, input keyboard in mobile terminal 100.Like this, when needs are tuned a stringed instrument to it to string, only need to take out the mobile terminal 100 that user carries with, and do not need to carry with a stringed musical instrument chord regulating device in addition, greatly facilitate user, in order to avoid the inconvenience occurring leaving behind this stringed musical instrument chord regulating device and bring.In a particular embodiment, mobile terminal 100 here comprises smart mobile phone, panel computer etc.
As shown in figure 11, for stringed musical instrument provided by the invention is tuned a stringed instrument a kind of schematic flow sheet of embodiment of method, as can be seen from the figure, stringed musical instrument is tuned a stringed instrument in method and is comprised the following steps:
S1 obtains the sound signal that stringed musical instrument sends.Specifically, in this step, pickup circuit 10 is used to obtain this sound signal.More particularly, this pickup circuit 10 can be used but not limited to as Fig. 3 or if the circuit diagram of Fig. 4 is to realize the object of pickup.
S2 processes sound signal.Specifically, in this step, sound signal is carried out digital-to-analog conversion and become digital signal.Or, specifically comprise in this step:
S21 carries out filtering to sound signal.Here specifically can be used but not limited to filtering circuit 30 as shown in Figure 5 to realize filter function.
S22 converts the sound signal after filtering to digital signal.
The frequency of the sound signal after process and predeterminated frequency compare, to realize the calibration to sound signal by S3.Specifically, if the frequency of sound signal after process is identical with predeterminated frequency, then the operation of tuning a stringed instrument that completes stringed musical instrument of explanation.Corresponding, if the frequency of sound signal after process is less than predeterminated frequency, then the string pine of stringed musical instrument is described, then it suitably screws by the knob of tuning a stringed instrument transferring stringed musical instrument; If the frequency of the sound signal after process is greater than predeterminated frequency, then illustrate that the string of stringed musical instrument is tight, then it suitably unscrews by the knob of tuning a stringed instrument transferring stringed musical instrument; Repeatedly adjust with this, until string to be transferred to standard pronunciation (frequency that string sends is identical with predeterminated frequency).
Based on above embodiment, the invention provides stringed musical instrument and to tune a stringed instrument the another kind of embodiment of method, as shown in figure 12, in this embodiment, specifically comprise the following steps:
S1 obtains the sound signal that stringed musical instrument sends.Specifically, in this step, pickup circuit 10 is used to obtain this sound signal.More particularly, this pickup circuit 10 can be used but not limited to as Fig. 3 or if the circuit diagram of Fig. 4 is to realize the object of pickup.
S2 processes sound signal.Specifically, in this step, sound signal is carried out digital-to-analog conversion and become digital signal.Or, specifically comprise in this step:
S21 carries out filtering to sound signal.Here specifically can be used but not limited to filtering circuit 30 as shown in Figure 5 to realize filter function.
S22 converts the sound signal after filtering to digital signal.
The frequency of the sound signal after process and predeterminated frequency compare, to realize the calibration to sound signal by S3.Specifically, if the frequency of sound signal after process is identical with predeterminated frequency, then the operation of tuning a stringed instrument that completes stringed musical instrument of explanation.Corresponding, if the frequency of sound signal after process is less than predeterminated frequency, then the string pine of stringed musical instrument is described, then it suitably screws by the knob of tuning a stringed instrument transferring stringed musical instrument; If the frequency of the sound signal after process is greater than predeterminated frequency, then illustrate that the string of stringed musical instrument is tight, then it suitably unscrews by the knob of tuning a stringed instrument transferring stringed musical instrument; Repeatedly adjust with this, until string to be transferred to standard pronunciation (frequency that string sends is identical with predeterminated frequency).
Comparative result in S4 step display S3.Like this, whether player completes by the seeing of visual result of display operation of tuning a stringed instrument in the process of tuning a stringed instrument.Specifically, it can realize object through but not limited to LCDs.
Based on above description, present invention also offers a kind of mobile terminal to tune a stringed instrument method, comprise as Figure 11 and stringed musical instrument are as shown in Figure 12 tuned a stringed instrument method in this mobile terminal method of tuning a stringed instrument, namely specifically comprise in this mobile terminal tunes a stringed instrument method: the step obtaining the sound signal that stringed musical instrument sends; Treatment step is carried out to sound signal; By the step that the frequency of the sound signal after process and predeterminated frequency compare; Or show the step of above-mentioned comparative result.Further, tune a stringed instrument in method at this mobile terminal 100, use as Fig. 3 or pickup circuit 10 as shown in Figure 4 obtain the sound signal that stringed musical instrument sends, filtering signal is as shown in Figure 5 used to filter sound signal, audio frequency processing signals is as shown in Figure 6 used to realize the process of the sound signal after to filtration and compare, use mobile terminal 100 display screen display comparative result, and use the keyboard in mobile terminal 100 to realize the input of predeterminated frequency.
It should be noted that above-described embodiment all can independent assortment as required.The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a stringed musical instrument chord regulating device, is characterized in that, comprises interconnective pickup circuit and audio process;
The sound signal that described pickup circuit sends for obtaining described stringed musical instrument;
Described audio process receives the described sound signal that described pickup circuit sends, and its frequency and predeterminated frequency is compared after processing described sound signal, to realize the calibration to the described sound signal that described stringed musical instrument sends.
2. stringed musical instrument chord regulating device as claimed in claim 1, it is characterized in that, described pickup circuit comprises: a microphone, the first inductance, the second inductance, the first voltage stabilizer, the second voltage stabilizer, the first direct earth capacitance, the second direct earth capacitance and connect electric capacity, wherein
One end of described first inductance is connected with the positive output end of described microphone, and one end of described second inductance is connected with the negative output terminal of described microphone; The other end of described first inductance connects with one end of one end of described first voltage stabilizer, described first direct earth capacitance, the positive output end of described one end and described pickup circuit of being connected electric capacity respectively; The other end of described second inductance connects with the ground connection output terminal of one end of described second voltage stabilizer, one end of described second direct earth capacitance and the described other end and described pickup circuit that are connected electric capacity respectively; The other end of the other end of described first electric capacity, the other end of described second electric capacity, described first voltage stabilizer and the other end of described second voltage stabilizer ground connection respectively.
3. stringed musical instrument chord regulating device as claimed in claim 2, is characterized in that, also comprise a reserved resistance in described pickup circuit, one end of described reserved resistance is connected with the negative output terminal of described microphone, the other end ground connection of described reserved resistance.
4. the stringed musical instrument chord regulating device as described in any one of claim 1-3, it is characterized in that, also comprise a filtering circuit, described filtering circuit is connected with described pickup circuit and described audio process respectively, and described filtering circuit carries out filtering to described sound signal and the sound signal after filtering is sent to described audio process.
5. stringed musical instrument chord regulating device as claimed in claim 4, it is characterized in that, described filtering circuit comprises: the first filter inductance, the second filter inductance, the first filter capacitor and the second filter capacitor, wherein,
One end of described first filter inductance is connected with the positive output end of described pickup circuit, and the other end of described first filter inductance is connected with one end of described second filter inductance and one end of described first filter capacitor respectively; The other end of described second filter inductance is connected with one end of described second filter capacitor and the positive input terminal of described audio process respectively; The other end of described first filter capacitor and the other end of described second filter capacitor ground connection respectively.
6. stringed musical instrument chord regulating device as claimed in claim 5, it is characterized in that, described audio process comprises: control module, memory module, signal receiving module, D/A converter module and comparison module;
Described memory module, is connected with described control module, and described memory module prestores described predeterminated frequency under the control of described control module;
Described signal receiving module, is connected with described control module, and described signal receiving module receives the sound signal that described pickup circuit sends under the control of described control module, or receives the filtered sound signal of described filtering circuit transmission;
Described D/A converter module, is connected with described control module, and the sound signal that described pickup circuit sends by described D/A converter module under the control of described control module or the filtered sound signal that described filtering circuit sends are converted to digital signal;
Described comparison module, is connected with described control module, and the frequency of the described digital signal that described D/A converter module sends by described comparison module and described predeterminated frequency compare.
7. stringed musical instrument chord regulating device as claimed in claim 6, is characterized in that,
The display module be connected with described audio process is also comprised, for showing the comparative result of comparison module described in described audio process in described stringed musical instrument chord regulating device;
And/or,
The load module be connected with described audio process is also comprised, for inputting described predeterminated frequency in described stringed musical instrument chord regulating device.
8. one kind comprises the mobile terminal of stringed musical instrument chord regulating device as claimed in claim 6.
9. stringed musical instrument is tuned a stringed instrument a method, it is characterized in that, described stringed musical instrument is tuned a stringed instrument in method and comprised the following steps:
S1 obtains the sound signal that stringed musical instrument sends;
S2 processes described sound signal;
The frequency of the sound signal after process and predeterminated frequency compare, to realize the calibration to described sound signal by S3.
10. stringed musical instrument as claimed in claim 9 is tuned a stringed instrument method, it is characterized in that,
Specifically comprise in step s 2: described sound signal is carried out digital-to-analog conversion and becomes digital signal;
Or,
Specifically comprise in step s 2:
S21 carries out filtering to described sound signal;
S22 converts the sound signal after filtering to digital signal.
11. stringed musical instruments as described in claim 9 or 10 are tuned a stringed instrument method, it is characterized in that, after step s 3, also comprise:
Comparative result in S4 step display S3.
12. 1 kinds use the tune a stringed instrument mobile terminal of method of stringed musical instrument as described in claim 9 or 10 to tune a stringed instrument method.
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| CN201510822863.1A CN105489207A (en) | 2015-11-24 | 2015-11-24 | String instrument tuning device and method, mobile terminal and mobile terminal tuning method |
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| CN201510822863.1A CN105489207A (en) | 2015-11-24 | 2015-11-24 | String instrument tuning device and method, mobile terminal and mobile terminal tuning method |
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Application publication date: 20160413 |