CN86208963U - Electronic organ developed on utilizing organ ic chip - Google Patents

Abstract

The utility model relates to a multifunctional electronic organ developed on utilizing large-scale single chip and organ IC. The electronic organ is provided with a sound shape envelope synthesizer, a device with modulation function, a tone color synthesizer, an automatic arpeggio electric circuit, and a convolution amplitude-frequency sounder. The utility model provided with pre-selection buttons of fourteen solo tone color and of ten appointed tone color has the ability to respectively imitate the ten appointed tone colors, a plurality of tone colors of orchestral music and of synthesizer. The electronic organ is provided with automatic arpeggio, ABC accompaniment, and eighteen presently popular automatic percussion rhythms. With the modulation function, the electronic organ can play music of any other key signature without changing fingering.

Description

Electronic organ developed on utilizing organ IC chip

The present invention relates to a kind of multifunction electronic qin of using extensive single-chip organ integrated circuit m208 and developing.

Do not have about patent documentation by retrieval and the mellotron of same structure of the present invention.Existing mellotron is made of integrated circuit and electronic component.These mellotrons are that the people gets in touch by keyboard and mellotron, through matrix-scanning, obtain whole scales by keyboard circuit; Produce multiple analog sound by tone filter and tone color switch; Produce the sound that knocks of simulation piano or xylophone by envelope modulation circuit; By emotion pedal circuit control dynamics, produce an artistic effect of file of rising and falling; Form various automatic rhythm melody with DLC (digital logic circuit) and percussion music mimic channel; Provide enough volume and working powers by power amplifier and power circuit.The sound shape envelope of these existing mellotrons is not established special governor motion, its acoustics amplitude-frequency device that yet do not circle round.

The purpose of this invention is to provide and a kind ofly have 61 and singly play key, the preliminary election of 14 kinds of solo tone colors and ten kinds are specified the tone color preliminary election, and can synthesize hundreds of tone color by sound shape envelope compositor; Be provided with automatic bass harmony accompaniment, arpeggio accompaniment and 18 kinds of present popular automatic percussion music melody accompaniments automatically; Also be provided with fuzzy symphony, the multifunction electronic qin of the amplitude-frequency special sound effects that circles round.

Technical characterictic of the present invention is: the master clock generator (1 that ring oscillator and frequency transposition switch constitute, 2) can produce 12 time clock by 12 average rates, after trill oscillator and the modulation of time-delay trill controller, deliver to the input end of single-chip organ integrated circuit m208, behind matrix-scanning, obtain 61 and singly play key sound rank signal and 4 ', 8 ', 16 ' three interval signals are delivered to tamber simulation synthesis system (6) respectively, by preliminary election of solo tone color and appointment tone color preliminary election control, can simulate the tone color of tens kinds of conventional musical instruments and export synthesizer tone by arteries and veins control bandpass filter.After sound shape envelope compositor (9) modulation treatment separately, can expand hundreds of not tone color of unisonance shape again, deliver to preamplifier stage again and amplify, just obtain various signal.Simultaneously via three groups of amplitude-frequency modulators, ultralow frequency sine-wave oscillator, penetrate the amplitude-frequency sound generator of forming with isolator (11) that circles round and handle, can obtain empty paddy sense and nervous terrified special sound effects.The automatic arpeggio system (18) that constitutes by sound source signal on-off circuit and packet of pulses winding thread, automatic bass harmony accompaniment system and automatic percussion music rhetorical melody accompanying system, it is the pulse that produces by the rhythm pulse producer, remove to drive counting decoder, drive automatic arpeggio more respectively, automatically bass chord compiler and percussion music compiler automatically, then through selection of bass chord style and automatic rhythm style are selected program is delivered to automatic arpeggio respectively automatically, automatic bass chord source of sound pulse switch system and percussion music analog generator, the automatic arpeggio with ripple effect that just can obtain to be scheduled to, accompaniment of bass chord style and percussion music style accompaniment automatically.At last all music signal is mixed, after voltage-controlled amplifier and the control of emotion pedal, be transported to power amplifier and promote the loudspeaker playback.This qin also is provided with the control of automatic rhythm foot and opens only control and ac-dc dual power supply.

The invention has the advantages that: stable performance, circuit are simply novel, and multiple functional, cost of manufacture is low.The tone color control section, the tone color that not only can imitate tens kinds of conventional musical instruments, but also can synthesize how special tone color by changing sound shape envelope, for performance provides abundant tone color preliminary election leeway; Automatic arpeggio, automatic bass harmony accompaniment and 18 kinds of present popular last over one hundred kind accompaniment styles of percussion music rhythm style acquisition also capable of being combined; Also being provided with the transposition function can be under the situation that does not change fingering, is the accompany melody of any accent of singer, and instrumental ensembles with other musical instrument people having the same aspiration and interest.

Below in conjunction with the description of drawings embodiments of the invention:

Fig. 1 is the complete machine functional-block diagram of mellotron.

Fig. 2 is the master clock-pulse generator circuit theory diagrams that are made of ring oscillator and frequency transposition switch of mellotron.

Fig. 3 is the synthesizer tone circuit theory diagrams of mellotron.

Fig. 4 is a mellotron sound shape envelope condensating synthesizering circuit schematic diagram.

Fig. 5 is the automatic arpeggio circuit system schematic diagram of mellotron.

Fig. 6 is the amplitude-frequency acoustics circuit schematic diagram that circles round of mellotron.

Fig. 7 is special tone color envelope oscillogram.

Fig. 8 (a) is four sections curve waveform figure of envelope compositor.

Fig. 8 (b, c) is the special waveform figure of envelope.

Fig. 9 is the mellotron shape assumption diagram.

Table 1 is that the frequency and the tone mark of master clock-pulse generator concerns the control parameters table.

Table 2 is component parameters tables of synthesizer tone circuit.

Table 3 is component parameters tables of sound shape envelope compositor.

Table 4 is component parameters tables of automatic arpeggio system.

Table 5 is the component parameters tables of amplitude-frequency acoustics circuit of circling round.

Fig. 1 is a mellotron complete machine functional-block diagram.The circuitry of mellotron is by master clock-pulse generator (1), transposition switching selector (2), trill modulating oscillator (3), time-delay trill controller (4), 6 * 12 matrix-scanning keyboards and extensive electric organ integrated circuit m2.08, constitute sound source generator (5), tamber simulation synthesis system (6), solo tone color preliminary election (7), specify tone color preliminary election (8), sound shape envelope comprise network (9), preposition put in advance (10), sound generator (11) circles round, beat generator (12), counting decoder (13), automatic arpeggio ABC compiler (14), automatic percussion music compiler (15), automatically the ABC style is selected (16), the automatic rhythm style is selected (17), from Pa ABC source of sound pulse switch system (18), percussion music analog generator (19), voltage-controlled amplification emotion controller (20), power amplifier (21), automatic rhythm opens only device (22), each element circuit of power circuit (23) constitutes.By the pulse that master clock-pulse generator produces, deliver to the input end of m208IC, after matrix-scanning is synthetic, obtain 61 note signals of singly playing key sound rank signal, three intervals, four and string signal, a bass tone signal.Four polyphonic ring tone signals are obtained striding six polyphonic ring tone signals of octave after expansion, signal source as automatic arpeggio, three interval signals are delivered to the tamber simulation circuit, after sound shape envelope modulation treatment, delivering to preamplifier stage again amplifies, just can obtain multiple different tone color signal, after effects circuit is handled, can obtain special acoustic signal again again.Pulse by the generation of rhythm pulse producer, drive counting decoder and rhythm compiler, then through the rhythm selector switch, program is delivered to arpeggio, bass sound, polyphonic ring tone and percussion music mimic channel respectively, the automatic arpeggio that just can obtain to be scheduled to, automatic bass harmony accompaniment style and percussion music accompaniment style.After at last all music signals being mixed, after voltage-controlled amplifier and the control of emotion pedal, deliver to power amplifier, promote the loudspeaker playback.

Fig. 2 is the master clock-pulse generator schematic diagram that is made of ring oscillator and frequency transposition switch of mellotron, this element circuit is formed ring oscillator by F1, F2, two Sheffer stroke gates and R1, R2, C1, P1, constitutes the transposition functional switch by K1, RS1～RS11.Wherein F1, F2 select C033 six not gates for use, and the R1 setting value is 3.3K, and the R2 setting value is 1.5K, and the C1 setting value is 20P, and P1 selects the 2.2K solid potentiometer for use, and K1 selects 1 * 12 grade of waver for use.Table 1 has been listed the corresponding clock frequency of each tone mark end, and these frequency parameters all are 12 average rates by music, determines relative error＜0.1% as calculated.The resistance of RS1～RS11 is all by determining after the frequency adjustment of this end.During use, can rotate K1 as required, instrumental ensemble, can under the situation that does not change fingering, play with its people having the same aspiration and interest for singer's accompaniment or with other musical instrument.

Accompanying drawing 3 is synthesizer tone circuit theory diagrams of mellotron.This circuit constitutes " double T " type arteries and veins control wave invigorating network by R9～R11, C6～C8, D1.Because of this network is to be serially connected in the feedback loop of BG1, R5～R8, C4, C5 composition, so formed arteries and veins control bandpass filter with buffering follower BG2, R12, R11, C9.When the electric current that passes through as D1 changes, little power transformation resistance rD1 of D1 is also changed thereupon, the centre frequency of bandpass filter also changes thereupon simultaneously, so a kind of special tone color that the tone color that it sends is conventional musical instrument can't be simulated.BG3, C10, R15 constitute packet of pulses winding thread generator, and the input of keyed pulse TDSA is depended in the output of envelope voltage.The envelope voltage waveform such as the accompanying drawing 7 of output.Q1 through R3, C2 connect 16 ' interval, Q2 connects 8 ' interval through R4, C3, K2 selects 2 * 2 switches for use, can increase even-order harmonic in the fundamental frequency signal by combination.C9 can determine the length of packet of pulses winding thread with R15.The B end is signal output part.Each working point of this circuit is located at best region through designing and calculating, test, has listed the device parameter values of this element circuit by table two.As long as by above-mentioned installation, just need not debug.

Accompanying drawing 4 is sound shape envelope compositors of mellotron.This circuit is by keyed pulse output TDS and the keying voltage output KPS of m208, constituted and had initial (A), decay (D), continue (S) disappear (R), four sections envelope of curves line compositors, the E end is the envelope voltage waveform test point of accompanying drawing 7.Accompanying drawing 8(a) is the typical plot of A, D, S, R.Form the pulse reverse device by C11, R16, R17, BG4, it will be born keyed pulse TDS and be reversed positive pulse TDSA, simultaneously make the BG5 conducting through R18, and dash to C12 by P2, P2 can change the Time Created (promptly playing dynamics) of A, P3, R20 form lingering sound length and regulate, and can regulate the dyingout time of (D), (R) simultaneously.Another road keying voltage KPS makes the BG6 conducting through R23, C13, the voltage of voltage on P4, R21, R22 and C12 of output is superimposed, P4 can change the height of (S) terminal voltage, (S) the time length of section maintenance is then determined by the button time, keying loss of voltage circuit promptly enters (R) period, and BG7, C14, P5, R25, C15 are envelope voltage output stages.Listed the device parameter values of this element circuit by table 3, this circuit only need be regulated P5 makes BG7 work in pinch off region, regulates the resistance of P2, P3, P4, and the envelope compositor just can imitate out bullet, draw, blow, play the sound shape that sound shape and conventional musical instrument are difficult to send.Fig. 8 (b, c) is the special waveform figure of envelope.

Fig. 5 is the automatic arpeggio circuit system schematic diagram of mellotron.This circuit carries out shaping by two not gates of F3, F4 to m208IC finger 3rd, 5th signal, behind CD1, CD2 frequency division, obtains six musical alphabet signals, these signals is delivered to the signaling switch input end of D2～D7.Six identical packet of pulses winding thread generators that constitute by BG8～BG13, R46～R63, C16～C21, control the break-make of six musical alphabet signals respectively, after R35, R37, R39, R41, R43, R45 mixing, deliver to piano or clavichord tone filter that R64～R71, C22～C25 forms, as the coded pulse input, output terminal just has plays the output of sound shape signal accordingly.K3 is piano or clavichord tone color selector switch.BG14, C26, C27, R72, R77 are the amplifiers of arpeggio signal, and P6 is the volume control of this signal.This circuit is by m208IC finger musical alphabet signal being expanded, drawn six musical alphabet signals of striding octave, as the source of sound of arpeggio sound.By pulse producer, counter, code translator, scrambler it is encoded, and obtain arpeggio through musical alphabet gating method with ripple effect.This circuit debugging key is to adjust R32 and R33, makes the signal amplitude behind the frequency division equate that with original signal R26～R31 is the divider resistance of six road signals.List the device parameter values of this element circuit by table four, only need get final product by above-mentioned Installation and Debugging.

Fig. 6 is the amplitude-frequency acoustics circuit schematic diagram that circles round.This circuit is formed the identical field effect transistor amplitude-frequency modulator of three joints by BG16～BG21, C32～C36, R79～R94, R99～R101, by BG22, BG23, C38～C40, C42, R95～R98, P7, P8 form the ultralow frequency sine-wave oscillator, and it is modulated.R102, C41 are used for the power filter of LF oscillator.BG15 is amplitude-frequency the penetrating with isolator of sound equipment and original signal of circling round.This circuit is a phase place amplitude-frequency modulator, is 50% o'clock in degree of modulation, can make frequency, tone color, the amplitude vibration of sound, sends the sound equipment that circles round with stereoscopic sensation characteristic.When degree of modulation is 100%, frequency, tone color, amplitude will be subjected to significantly modulating, and " acoustic image " will produce the acoustics of a kind of nervous terror, the sense of empty paddy.List the device parameter values of this element circuit by table five.During this element circuit debugging, transfer P7 to make the frequency of sine-wave oscillator in 4～10HZ scope earlier.Original signal and amplitude-frequency circle round the stack ratio at 1:2, error is not more than ± 10% o'clock best results.Can realize that K4 is an amplitude-frequency boomerang effect switch by the resistance that changes R78 and R103.D is the theme signal input part, and R is the automatic accompanying system signal input part, delivers to voltage-controlled amplification through the R104 mixed signal that superposes in the lump from C43, and emotion controller (20) promotes the loudspeaker playback to power amplifier (21).

Fig. 9 is the mellotron shape assumption diagram.On the keyboard of mellotron by AC Power supply socket (24), emotion pedal rhythm is repaiied only jack (25), power light (26), external direct current power supply jack (27), power switch (28), external speaker earphone jack (29), transposition controller (30), total volume is regulated (31), time-delay trill control (32), the sound control system of circling round (33), trill intensity adjustments (34), automatically the arpeggio volume is regulated (35), automatically bass chord volume is regulated (36), automatically the percussion music volume is regulated (37), solo preselector volume (38), specify preselector volume (39), the loudness of a sound degree that circles round is regulated (40), keyboard shape and color control (41), automatic rhythm style selector switch (42), fuzzy symphony sound control system (43), automatic bass chord style selector switch (44), solo tone color pilot lamp (45), solo tone color preselector (46), solo tone color sound shape control (47), (48), (49), solo tone color preselector (50), (51), specify tone color preliminary election pilot lamp (52), specify tone color sound shape control (53), (54), (55), specify tone color preselector (56), main loudspeaker (57), tweeter (58), solo keyboard (59), automatically bass arpeggio control (60), automatically the arpeggio tone color is selected (61), chordal type is selected (62), (63), (64), automatic rhythm speed is regulated (65), tenuto control (66), automatic rhythm conversion pilot lamp (67), rhythm stops control (68), accompaniment manual (69), be fixed on panel with screw.With screw qin shell (70) is become the mellotron shell with the keyboard fixed combination.

Table 1

Claims (6)

1, a kind of use extensive single-chip organ integrated circuit m208 and develop have 61 singly to play key multifunction electronic qin be by clock signal generator (1,2), extensive single-chip organ integrated circuit m208 (5), tamber simulation synthesis system (6), sound shape envelope compositor (9), the amplitude-frequency sound generator (11) that circles round, automatic arpeggio system element circuits such as (18) constitute, and it is characterized in that:

The master clock-pulse generator of a, mellotron is made up of ring oscillator (1) and transposition switch (2);

Synthesizer tone in b, the tamber simulation compositor (6) is made up of arteries and veins control bandpass filter;

C, sound shape envelope compositor are to constitute by two current potentials of keyed pulse on-off circuit and the output of keying voltage control circuit are superimposed;

D, automatic arpeggio system are made of sound source signal on-off circuit, packet of pulses winding thread;

E, the amplitude-frequency acoustics circuit that circles round are by three groups of amplitude-frequency modulators, ultralow frequency sine-wave oscillator, penetrate with isolator and constitute.

2, mellotron according to claim 1 is characterized in that: frequency transposition switch (2) is constituted by K1, RS1～RS11.

3, mellotron according to claim 1 is characterized in that: synthesizer tone constitutes double-T shaped arteries and veins control wave invigorating network by R9～R11, C6～C8, D1 and BG1, R5～R8, C4, C5 have formed arteries and veins control bandpass filter.

4, mellotron according to claim 1, it is characterized in that: sound shape envelope compositor forms the keyed pulse on-off circuit by R18, R19, BG5 and BG6, R23, C13 form the keying voltage control circuit, the superimposed formation of voltage of two circuit outputs, regulate envelope waveform (A) Time Created by P2, P3 regulates the dyingout time of envelope waveform, and P4 regulates the height of envelope (S) terminal voltage.

5, mellotron according to claim 1 is characterized in that: form signal switching circuit by D2～D7, R34～R45 in the arpeggio system automatically, form six identical packet of pulses winding thread generators by BG8～BG13, R46～63, C16～C21.

6, mellotron according to claim 1, it is characterized in that: the amplitude-frequency acoustics circuit that circles round is formed identical field effect transistor amplitude-frequency modulator, BG22, BG23, C38～C40, C42, R95～R98, P7, P8 by BG16～BG21, C32～C36, R79～R94, R99～R101 and is formed the ultralow frequency sine-wave oscillator, and BG15, R74～R77, C28, C29 form amplitude-frequency the penetrating with isolator of sound equipment of circling round and constitute.

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