CN2054189U

CN2054189U - Electronic flute

Info

Publication number: CN2054189U
Application number: CN 89207080
Authority: CN
Inventors: 孙明
Original assignee: HOUMA RADIO FACTORY SHANXI
Current assignee: HOUMA RADIO FACTORY SHANXI
Priority date: 1989-05-11
Filing date: 1989-05-11
Publication date: 1990-03-07

Abstract

The utility model relates to an electronic flute which is composed of a sound source circuit, a digital frequency dividing circuit, a musical scale key logical control circuit, three octave diapason electronic switching circuits, a tone color filtering and preamplification circuit, a playing circuit and a power amplification circuit, wherein, the musical scale key logical control circuit and the three octave diapason electronic switching circuits are used to control the operation of the electronic flute. The utility model has the same playing fingering with Chinese bamboo flutes, has the advantages of compact volume, reliable performance, portability and clear tone color, has flute diaphragm feel and is an electronic musical instrument which can visually simulate the tone color and the art of the folk Chinese bamboo flute in China.

Description

Electronic flute

The utility model belongs to a kind of and produces the electronic musical instrument of musical sound with electronic generator, specifically is meant can simulate timbre of flute among the people visually and drill to gather the Electronic flute of skill.

Known patent number is the Electronic flute of CN87212065, has the bamboo membrane sense, can simulate timbre of flute among the people visually, but the sounding circuit of this Electronic flute is to adopt resistance, electric capacity accordatura, is difficult to improve the accuracy in pitch degree; In order to guarantee accuracy in pitch, must select to piece together the high nonstandard Resistor-Capacitor Unit of numerical precision that this is difficult to realize aspect production technology.In addition, sounding circuit is responsive to mains voltage variations, to guaranteeing that accuracy in pitch also causes certain influence.Secondly, the button of this Electronic flute adopts metal spring leaf and conductive rubber, behind metal key-press surface oxidation or laying dust, has then increased the conductive resistance of contact, causes the accuracy in pitch deviation.Therefore the circuit working state of used gas control AND circuit is a switch form, can't set up soft sound head and sound tail, and it is stiff to tell sound, and wayward, tells the sound characteristic when being difficult to embody bamboo flute playing.

It is identical with bamboo flute that the purpose of this utility model provides a kind of performance fingering, and pronunciation is sensitive, frequency division is reliable, scale is accurate, easy to adjust, tells audio fruit Electronic flute true to nature naturally.

For achieving the above object, as shown in Figure 1, by sounding circuit (1), digital frequency dividing circuit (2), scale button logic control circuit (3), octave range electronic switching circuit (4), tone color filtering and pre-amplification circuit (5), play wind instruments circuit (6), power amplification circuit (7) is formed Electronic flute.Sounding circuit (1) wherein, as shown in Figure 2, by a hex inverter IC ₁, digital temperament generator IC ₂, double D trigger IC ₃Deng composition.Hex inverter IC ₁Inside comprises six identical phase inverters, IC ₁Produce Electronic flute the highest needed master oscillator frequenc, W ₁Be to be used for regulating trill amplitude, W ₂Be to be used for regulating warble frequency, W ₃Be to be used for regulating master oscillator frequenc, CK ₂It is the alteration switch of 8 tones; From IC ₁The master oscillator frequenc of output is input to IC ₂Input end, IC ₂Arrange needed 12 frequency halftones, IC by twelve-tone equal temperament on the outputting music exactly ₃The highest in 12 a frequency halftones audio frequency is carried out frequency division again one time, to obtain the required double bass order frequency of Electronic flute.

By digital temperament generator IC ₂12 frequency halftones of output are input to digital frequency dividing circuit (2), as shown in Figure 3, and digital frequency dividing circuit (2) is by IC ₄-IC ₉The doubinary system up counter is formed, and it carries out four frequency divisions, these circuit with institute's incoming frequency and has only utilized three frequency divisions, obtained needed musically three octave, diode D ₃, resistance R ₂₈, R ₂₉And capacitor C ₈Formed IC ₄-IC ₉The electronic gate on-off circuit of each output terminal is by scale button CK ₄-CK ₁₄With with the door integrated circuit (IC) ₁₀, IC ₁₁Deng the scale button logic control circuit of forming (3), can change IC by operation scale button as shown in Figure 3 ₁₀, IC ₁₁The logic working state, this moment IC ₁₀, IC ₁₁Each output terminal change by logic function, this changes the duty of the electronic gate on-off circuit that removes each output terminal of control figure formula frequency dividing circuit (2) again.As shown in Figure 3, the light emitting diode D in the scale button logic control circuit (3) ₄And resistance R ₂₄Deng having formed the scale luminous display circuit, luminous with the logic variation flicker of circuit.

Octave range electronic gate on-off circuit (4), as shown in Figure 4 is by controlling three octave button CK ₁₇, CK ₁₈, CK ₁₉, signal can be input to tone color filtering and pre-amplification circuit (5), enter then and play wind instruments circuit (6), through volume potentiometer W ₅, BG ₄Afterwards ingoing power amplifying circuit (7), promote loudspeaker at last.

Advantage of the present utility model and good effect are: adopted digital sounding circuit, the generation of scale relies on a series of digital frequency dividing circuit fully, has improved the accuracy in pitch of Electronic flute greatly, has simplified debug process.Scale button and scale button logic control circuit (3) compounding practice are controlled the variation of scale, have improved the reliability of circuit.Play wind instruments circuit owing to use the variation that comes the control circuit output voltage with breath instead, make it connect electronic switching circuit, reach the sound head with the sound tail changes according to the circuit envelope, and the power of breath can control the size of volume, it is really true to nature naturally therefore to tell audio.

Description of drawings of the present utility model is as follows:

Fig. 1 is way circuit figure of the present utility model.(1) is sounding circuit among the figure, and (2) are digital frequency dividing circuits, and (3) are scale button logic control circuits, (4) be octave range electronic switching circuit, (5) be tone color filtering and pre-amplification circuit, (6) are to play wind instruments circuit, and (7) are power amplification circuits.

Fig. 2 is the enlarged drawing of sounding circuit among Fig. 1 (1).

Fig. 3 is the enlarged drawing of digital frequency dividing circuit among Fig. 1 (2) and scale button logic control circuit (3).

Fig. 4 is octave range electronic gate on-off circuit (4) among Fig. 1, tone color filtering and pre-amplification circuit (5), play wind instruments the enlarged drawing of circuit (6) and power amplification circuit (7).

Fig. 5 is that the profile master of Electronic flute looks synoptic diagram.(8) are power lights among the figure, (9) be that Electronic flute shell, (10) are the range active displays, (11) be the tone color selector switch, (12) are the scale active displays, and (13) are display casings, (14) be the scale key casing, (15) be the whole tone button, (16) are the semitone buttons, and (17) are loudspeakers, (18) be external power supply socket, (19) are the circuit output sockets.

Fig. 6 is the rear view of Fig. 5, and (20) are to play wind instruments microphone MC among the figure, and (21) are suspension ring, and (22) are that back shroud, (23) are the sounding circuit shells, and (24) are the modified tone switches, and (25) are the fine setting holes, and (26) are to play wind instruments switch, W ₅Be volume potentiometer, (27) are power switches, and (28) are three octave range buttons, and (29) are shells.

Fig. 7 is the right side view of Fig. 5.

Embodiment accompanying drawings of the present utility model is as follows: as shown in Figure 1, sounding circuit (1) is by a phase inverter CD ₄₀₆₉Integrated package and peripheral cell are formed, or by a hex inverter IC ₁Be CD ₄₀₆₉Integrated package and peripheral cell are formed, and utilize wherein three phase inverters to form a RC oscillator and make master oscillator frequenc, and a phase inverter is formed double-T shaped RC trill oscillator, all the other two phase inverters need not, CD ₄₀₆₉The master oscillator frequenc of output is input to digital temperament generator integrated circuit (IC) ₂Be M ₀₈₂Input end, M ₀₈₂Needed 12 frequency halftones arranging by twelve-tone equal temperament of outputting music exactly, these 12 frequency halftones are input to IC in the digital frequency dividing circuit respectively ₄-IC ₉Input end (i.e. 1 pin and 9 pin) IC ₄-IC ₉Be doubinary system up counter CD ₄₅₂₀, it can carry out each incoming frequency four times frequency division, i.e. four octave on the range, and this circuit has only been used three octave, CD ₄₅₂₀Each output terminal all be connected to an electronic gate on-off circuit, these on-off circuits be subjected to the door integrated circuit (IC) ₁₀, IC ₁₁Output terminal control, IC ₁₀, IC ₁₁Be that model is CD ₄₀₇₃With the door integrated circuit, and be subjected to scale button CK with the logic working state of door integrated circuit ₄-CK ₁₄Control, button CK ₄, CK ₇, CK ₈, CK ₁₀, CK ₁₂, CK ₁₃Be the whole tone button, CK ₅, CK ₆, CK ₉, CK ₁₁, CK ₁₄Be the semitone button, the electronic gate on-off circuit is by diode D ₃, R ₂₈, R ₂₉, C ₈Form, have only the resistance R of working as ₂₉When there is control voltage at two ends, diode D ₃Just meeting conducting, CD ₄₅₂₀The signal of output just can pass through.Control voltage is from IC ₁₀, IC ₁₁Each output terminal.

During performance, CK ₃, CK ₆, CK ₉, CK ₁₁, CK ₁₄The semitone button is not generally pressed, and its two contacts must be normally offs like this, and another point is a normally open, and normally closed point is connected+9 volts of power supplys, so IC ₁₀, IC ₁₁Relative input end be high level state, other 6 whole tone button CK ₄, CK ₇, CK ₈, CK ₁₀, CK ₁₂, CK ₁₃Be used with other 5 semitone buttons and control and a door integrated circuit CD ₄₀₇₃The logic working state.The same during performance with the bamboo flute fingering, the left hand third finger is pinned CK ₄, middle finger pins CK ₇, forefinger pins CK ₈Right ring finger is pinned CK ₁₀, middle finger pins CK ₁₂, forefinger pins CK ₁₃, so just being equivalent to pin 6 sound holes of bamboo flute, the semitone button is motionless, just presses when having only melody to need.Be operation and the CD that example is analyzed the scale button with the tube sound 5 and 6 of playing bamboo flute now ₄₀₇₃With the door integrated circuit, the logic working state of electronic gate on-off circuit.

As whole tone button CK ₄When pressing, CK ₄1 with 2 connections, the electronic gate on-off circuit control end R of Lian Jieing with it ₂₉Two ends be opened owing to connecting+9 volts power supplys, the scale class signal of circuit output this moment is like the i.e. tube sound 5 of the bass 5(of bamboo flute), CK when lifting the left hand third finger ₄1 disconnect with 2 and with 3 connections, at this moment CD ₄₀₇₃With the door integrated circuit (IC) ₁₀13 pin+9 volts high level (13,12,11,10 pin are a unit, and 10 pin are output terminals, and its excess-three pin is an input end) appears, and the third finger of left hand is already with CK ₇Press CK ₇1 with 2 be switched to IC ₁₀11 pin high level, CK also appear ₅Be that the semitone key is not pressed, its 1 and 3 is switched to IC ₁₀12 pin also be high level.This high level is input to CD ₄₅₂₀IC ₅The control end of 6 scale electronic gate on-off circuits, electronic gate is opened, 6 sounds of the similar bamboo flute of scale of circuit output, so far, by scale button and CD ₄₀₇₃Be all over 6 sounds performance transfer process with 5 sounds of the Electronic flute of door integrated circuit and electronic gate on-off circuit control.In case press the nameless and door integrated circuit CD of left hand ₄₀₇₃Middle IC ₁₀13 pin be low level at once, the electronic gate on-off circuit of scale 6 does not have control voltage and cuts out immediately, the tube sound 5 that this moment occurred similar bamboo flute, above operating process is played as long as press the bamboo flute fingering, circuit just can be exported tone color similar to bamboo flute and skill, and signal conveys is controlled electronic door circuit to three octave ranges of next stage.

BG ₁, D ₁, CK ₁₇, CK ₁₈, CK ₁₉Form the electronic gate on-off circuit of three octave ranges Deng element, when playing operation the left hand thumb has been pressed CK respectively ₁₇, CK ₁₈, CK ₁₉The scale signal of three octaves can pass through electronic gate separately, form circuit because circuit adopts RC discharge and recharge envelope, so the foundation of sound head is very natural with disappearance, has the effect of traditional bamboo flute.CK ₁Be the tone color selector switch, conversion CK ₁Signal is delivered to BG ₂Prime amplifier is again through volume potentiometer W ₅Deliver to CK ₃, CK ₃Be that electronics is played and played wind instruments switch, when pressing CK ₃The time, circuit is in the state of playing wind instruments, and aims at microphone MC and blows gently, can obtain singly the telling of similar bamboo flute, twoly tells, the three cheerful and light-hearted playing effects of telling, and controls BG owing to utilized the power of blowing to change ₃The variation of collector output voltage, thus caused by diode D ₂The size of the electronic gate on-off circuit conducting degree of forming Deng element, and controlled the power that signal passes through, because the electronic gate on-off circuit has adopted RC to discharge and recharge envelope and has formed circuit, therefore it is crisp to tell sound, the sensation nature, the while can embody the emotion variation effect of the order of importance and emergency, melodious pause and transition in rhythm or melody.

Signal is through CK ₁₅After be input to power amplification circuit IC ₁₂3 pin, pass through capacitor C again ₁₃To the Yang Sheng device.

Claims

1, the Electronic flute a kind of by sounding circuit, sound source control circuit, that tone color filtering and pre-amplification circuit are formed is characterized in that sounding circuit (1) is by a hex inverter IC ₁Digital temperament generator IC ₂, double D trigger IC ₃Deng composition, hex inverter IC ₁Inside comprises six identical phase inverters, by digital temperament generator IC ₂12 frequency halftones of output enter into by IC ₄-IC ₉In the digital frequency dividing circuit (2) that doubinary system totalizer etc. are formed, by scale button CK ₄-CK ₁₄An and and door integrated circuit (IC) ₁₀, IC ₁₁The attached button logic control circuit of forming of sound (3) is by operation scale key change IC ₁₀, IC ₁₁The logic working state, and the duty of electronic switching circuit in the control figure formula frequency dividing circuit (2); Octave range electronic gate on-off circuit (4) is by control, octave button CK ₁₇, CK ₁₈, CK ₁₉With signal import tone color filtering and pre-amplification circuit (5), through play wind instruments circuit (6), power amplification circuit (7) promotes loudspeaker.

2, by the described Electronic flute of claim 1, it is characterized in that the IC in the sounding circuit (1) ₁Can be CD ₄₀₆₉, IC ₂Can be M ₀₈₂

3, by claim 1,2 described Electronic flutes, it is characterized in that the IC in the scale button logical circuit (3) ₁₀, IC ₁₁Can be CD ₄₀₇₃With door integrated circuit, wherein CK ₄, CK ₇, CK ₈, CK ₁₀, CK ₁₂, CK ₁₃Be the whole tone button, CK ₅, CK ₆, CK ₉, CK ₁₁, CK ₁₄It is the semitone button.

4, by the described Electronic flute of claim 3, it is characterized in that the IC in the digital frequency dividing circuit (2) ₄-IC ₉Can be CD ₄₅₂₀Doubinary system totalizer, each output terminal all have one by diode D ₃, resistance R ₂₈, R ₂₉And capacitor C ₈The electronic gate on-off circuit of forming.

5, by the described Electronic flute of claim 4, it is characterized in that, play wind instruments in the circuit (6) by diode D ₂The electronic gate on-off circuit of forming Deng element adopts RC to discharge and recharge envelope formation circuit.