RU2568265C1 - Method of producing musical composition and apparatus therefor - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: method is carried out by recording audio parameters in frame format represented by electronic spreadsheets populated with audio parameters on a notebook screen and successively loaded into the memory of the notebook. The method is carried out using a music playback device, which includes a notebook, a coding unit, an audio frequency generator unit, first through forty second key units, and four music playback channels.

EFFECT: enabling recording of a musical composition on electronic spreadsheets for producing a musical composition without a musician.

2 cl, 7 dwg, 4 tbl

Description

The invention is an option for creating a musical work with recording parameters of sounds on spreadsheets in a laptop. The prototype is a way to create a musical work in which the parameters of sounds are recorded in graphic characters on paper [1, p. 5], and the reproduction of a musical work is performed by the pianist manually on the piano, for which it was written. Sound parameters are recorded using graphic characters of musical notation [1, p. 5]. The basis of music is a musical tone-sound of a certain height, which represents the oscillatory process of air of the corresponding frequency and the corresponding amplitude of the vibrations brought by graphic signs to the stave [1, p. 8]. The prototype of a device for reproducing a musical work is a piano, the design of which is determined by a fixed set of tones, and the parameters of musical sounds [1, p. 3] are: the height of the frequency of the sound, the sound volume / the magnitude of the amplitude fluctuations of the sound waves /, the duration of the sound and timbre / coloring with the sounds associated with the sound frequency /. The piano keyboard has 52 white keys that correspond to fifty-two main stages of the scale, seven main stages of the scale periodically repeat and cover the sounds of all stages of the scale [1, p. 4]: High, mid, and low frequency sounds. The plot of the scale, which includes seven steps of do-re-mi-fa-sol-la-si, represents an octave. In creating music, sounds are used that have a pronounced frequency from 16 Hz to 4000 Hz [1 p. 3]. In the prototype of the method, four parameters of each musical sound are recorded on paper of the musical staff by the signs of the notes: sound pitch in frequency, sound volume level, sound duration and timbre / sound coloring with its sounds /. Sound parameters are recorded with graphic characters of musical notation on paper. The disadvantage of the prototype method is the impossibility of performing musical recordings without a musician performer. The purpose of the invention is the recording of a musical work on spreadsheets for the performance of a musical work without a musician-performer / without an orchestra /. The essence of the proposed method is the recording of musical information of the work as part of the parameters of the pitch / frequency /, sound volume and duration of sound on spreadsheets sequentially loaded into the laptop’s memory, creating a music book in it, and playing back the musical work without the participation of musicians. In the method, octaves are used, which are also used in musical works for piano: large octave, small octave, first, second, third and fourth octaves / Fig. one/. Bearers of audio information are format frames, which are spreadsheets / Fig. 1 /, the number of which is determined by the duration of the musical work.

The music reproducing apparatus of FIG. 2, the color-code converter of FIG. 3, the scanning circuit of FIG. 4, the key block of FIG. 5, the music playback channel of FIG. 6. The format tables are identical, each table has a field size: horizontally 160 mm, vertically 168 mm, table diagonal 9.2 inches, cells in a square table 4 × 4 mm, total cells 1680. The table of FIG. 1 has 40 columns / 40 × 4 mm = 160 mm / and forty-two horizontal rows, columns and rows 4 mm wide / 42 × 4 mm = 168 mm /. Each line is a step of the scale: do-re-mi-fa-sol-la-si in its octave, the section of the scale between the steps of Do is an octave of the table. 3. The recording of audio information starts from the top line. To the table / Fig. one/. Information on three sound parameters is presented in each line: frequency / pitch of sound /, which is represented by the line itself, sound volume level - is represented by coloring / filling / of the first cell of the sound interval with the color, respectively, of Table 1, and sound duration / sound interval /, which is represented by the number of cells dark gray and the last cell at the end of the sound interval is always filled with brown, tab. one.

Creating tables on a laptop screen is performed in Word 2007/2010 / [9, p. 385], for this the "Insert" ribbon opens, click on the arrow under the "Table" button [9, p. 386], it turns out the finished template of the same cells, the template is adjusted to the desired table "format-frame" of FIG. 1, moving the mouse over the template, select forty-two rows in the format-table table, make each 4 mm wide, and form forty columns in the format-format table also with 4 columns. The created format-format tables will compose a book, which will include sheets of spreadsheets with the names sheet 1, sheet 2 ... etc., the number of sheets corresponds to the duration of the musical work. The book of sheets with format-format tables presents a new File, the sheets in which the tables represent. The rows in the tables are indicated by the numbers 1, 2 ... 42, the columns from the first to the fortieth are indicated by Latin letters: A, B, C ..., AA, AB, AC ... AN [12, p. 354], each cell has an individual address consisting of a column letter and a row number at their intersection [12, p. 354]. Before filling out the tables, all cells in it are filled with a dark gray color so that the vision distinguishes between cells and rows. Entering sound parameters is performed by selecting the necessary cells in the rows of the table by filling them with the color of the volume level according to table 1, performed according to the menu [9, p. 387], shown in FIG. 7. A method of creating a musical work includes:

- creating a spreadsheet format frame on the laptop screen,

- filling in the cells in spreadsheets format frames with the parameters of each sound: frequency, sound volume level and sound duration, the first cell is painted in color according to the volume level / table. 1 /, behind it, the cells of dark gray create the duration of the sound and the last cell is always brown indicates the end of the duration of the sound. Upon completion, the frame-format table is loaded into the file created for them. Reproduction of a musical work includes:

1. The introduction of the laptop in the process of sequential output tables format frames from a file to the center of the screen with a frequency of 0.5 Hz,

2. Scan by block 2 of the coding of each table on the laptop screen to issue five-digit codes for the volume level of sounds to the first control inputs U _from keys 7 / Fig. 2 /, which in the open state connect the outputs of block 5 of the sound frequency generators to the corresponding inputs of the matrices 9 of the pulsed LEDs in the first and fourth channels of music playback.

To enter sound format parameters into the spreadsheet, the table is displayed on the laptop screen, the cells in the table are filled in rows from top to bottom, and from row to row from left to right. The pitch of the sound in frequency is represented by the string itself; an example of populating the format-frame table is shown in FIG. 7. The volume level is fixed in the first cell from the duration of the sound by coloring it / fill / instead of a dark gray background with the color, respectively, of Table 1, then, respectively, the duration of the sound is counted, starting with the color, the number of dark gray cells taking into account the duration of the sound of one cell is 50 ms, and the last cell in the interval of sound is always colored in brown. The duration of the sound of one cell is taken in 50 ms from the condition that the repetition of sound signals by human hearing is not perceived by separate sounds if the delay time of sounds does not exceed 50 ms [4, p. 32, 8, p. fifteen]. The duration of the sound of one format-frame / one table / is two seconds: 0.05 s × 40 columns.

The music playback device includes / FIG. 2 / laptop 1, coding unit 2, which is attached to the laptop screen body 3 by four screws and whose center coincides with the center of the laptop screen 1, includes a placement unit 4, in which forty-two blocks 6 of _1-42 keys are located, each block 6 of five / Fig. 5 / keys 7 _{1-5 of} which, according to the number of bits in the code for the sound volume level, includes a block 5 of sound frequency generators / ЗЧ /, including forty-two sound frequency generators, each of which generates sinusoidal vibrations of sound frequencies of one stage of the scale, respectively, of Table 3, and includes the first and fourth channels 8 _1-4 music playback, performed identically. Each channel 8 includes / Fig. 2 and 6 / matrix 9 of the corresponding number of pulsed white-light emitting diodes, in the first channel 8 ₁ and second 8 _{2 the} matrices 9 contain 70 pulsed LEDs, in the third 8 ₃ and fourth 8 ₄ channels of the matrix 9 include 35 pulsed LEDs. The matrix LEDs 9 _{1 are} connected to the outputs of the keys 7 in blocks 6 _{1-14 of the} keys, the LEDs of the matrix 9 _{2 are} connected to the outputs of the keys 7 in blocks 6 of _15-28 keys, the LEDs of the matrix 9 _{3 are} connected to the outputs of the keys in blocks 6 of _29-35 keys and in the matrix 9 ₄ connected to the outputs of the keys 7 in blocks 6 of _36-42 keys. Each LED in the matrices 9 _1-4 on the radiation side has a neutral filter with a radiation attenuation coefficient, respectively, of the discharge weight in the volume code / tab. 1 /, which serves the LED / to which of the five keys in block 6 this LED is connected /. The first - fourth channels 8 _1-4 each includes / Fig. 2 and 6 / the lens 10, the optical axis of which coincides with the optical axis of the matrix 9 of the LEDs of its channel, includes a photodetector 11 located in the focal plane of the lens 10, the output of the photodetector 11 is connected to the input of the operational amplifier 12, the output of which is connected to the input of the power amplifier 13, the output of which is connected to the input of the loudspeaker 30GD-1 in channels 8 ₁ and 8 ₂ , to the input of the loudspeaker 15GD-11 in channels 8 ₃ and 8 ₄ [3, p. 200]. Forty-two generators of sound frequency block 5 produce sinusoidal oscillations, each of one stage of the scale, table 3, and together provide frequency ranges of six octaves, table 2.

After entering the first sound in the table of parameters, the author enters the second sound: if the second sound has the same frequency, it is entered in the same line, if its frequency is different, its parameters are entered in the line with the sound frequency according to the table. 3. The duration of a sound always consists of the first color cell in Table 1, the number of dark gray cells, each lasting 50 ms, and the last brown cell. Thus, the lines of the first format frame are filled, and it is loaded into the intended file. Then the following format-format tables are filled in with the sound parameters, which are sequentially entered into your file. The number of format-format tables loaded into the intended file is determined by the duration of the piece of music. The coding unit 2 includes a scanning circuit of FIG. 4 and a matrix of 1680/40 × 42 / color-code converters according to the number of cells in the frame format, FIG. 3. The scanning scheme / Fig. 4 / comprises a series-connected divider 22 frequency, the input of which is connected to the conductor clock frequency of the system bus in the laptop processor, and distributor 23 the pulses having according to the number of columns in a table format frames forty outputs, each of which is connected to the input of its pulse amplifier ₂₄ January _-40 . The output of each pulse amplifier 24 through a diode is connected in parallel to the control input of its forty-two color-code converters 14, the first and fifth outputs of each of which are connected to the control inputs U _{from the} corresponding keys 7 in the key blocks 6 / FIG. 2 /, the sixth output U _{3 of the} color-code converter is connected to the combined second control U ₃ inputs of the keys of blocks 7 in the block 6 of the keys of FIG. 5. 1680 converters 14 "color code" are identical / Fig. 3 /, each contains an opaque case 14, in the input window of which there is an opaque microfilter 15, which acts as an input window for irradiating the color-code converter from a color cell from a format-frame line. The microfilter 15 is attached to the free end of the micropiezoelectric element 16. In the absence of a control signal from the amplifier 24 / Fig. 4 / the input window in the housing 14 is closed. The second end of the micro-piezoelectric element 16 is rigidly fixed in the housing 14 and is connected through the diode to the output of its pulse amplifier 24. The control pulse has a duration of 0.05 s / 50 ms / and an amplitude sufficient for the micro-piezoelectric element 16 to bend [5, p. 26]. With the arrival of the control signal, the micropiezoelectric element 16 opens the passage to irradiation from the colored cell of the table row into the lens 17, behind which the first, second, third, fourth are sequentially mounted and rigidly fixed at equal distances from each other along the optical axis of the lens 17 and at an angle of 45 ° to it and a fifth translucent micromirror 18 _1-5 , each of which is located in front of the micromirror passes to the next radiation, attenuated by half, for which each micromirror has a beam splitting, performing the ratio of reflected radiation to transmitted as 1: 0.5 [6, p. 223]. The first to fifth photodetectors 19 _1-5 , each of which has a color filter on the receiving side, are located on the side of the housing in places reflected from the radiation mirrors 18 _1-5 , FIG. 3: the photodetector 19 ₁ has a purple filter, the second 19 ₂ has a green filter, the third 19 ₃ has a red filter, the _{fourth 4} has a yellow filter, the fifth 19 ₅ has a yellow filter, the sixth 19 ₆ photodetector is located in the housing opposite the lens 17 and after the micromirror 18 ₅ and has a brown filter. The color-code converter 14 in each column / column / scans the cells of the column synchronously and in parallel. At the time of irradiation with color radiation from the color cell, one of the photodetectors 19 is triggered, FIG. 3, in which the filter corresponds to the color of the irradiation: when irradiated with violet, the photodetector 19 _{1 is} triggered, the pulse from it is amplified in the pulse amplifier 20 ₁ / Fig. 3 /, from the output of which it goes to the input of the first / senior / discharge 21 ₁ in the five-digit register 21, when irradiated with green, the photodetector 19 _{2 is} triggered, from it, after amplification in the amplifier 20 _{2, the} pulse enters the second discharge of register 21 ₂ , when irradiated the photodetector 19 _{3 is} activated in red, from it after amplification the pulse enters the third discharge 21 _{3 of} register 21, when irradiated with blue the photodetector 19 _{4 is} activated, from which the pulse after amplification in the pulse amplifier 20 ₄ enters the fourth discharge 21 _{4 of} register 21, at irradiation and yellow triggered photodetector May _19, from which the pulse is supplied after amplification to the fifth digit on May ₂₁ register 21. Amplifier 20 _1-5 have equal amplification factors, and the amplifier outputs are combined through the diodes, and the combined output is the signal U and five-bit level code _vyd the volume of sound from the register 21 to the output to the corresponding block of keys 6 of FIG. 2. The outputs of the register 21 are the outputs of each Converter 14 "color code". Five-digit codes in parallel form arrive at the first control U _{from the} inputs of the blocks of keys 6 / Fig. 2 /. The pulse of one of the five bits of the code opens one of the five keys 7 in the corresponding block of keys 6 / Fig. 5 /, and through the public key to the input of the LED to which this key 7 is connected, sinusoidal vibrations from the corresponding sound generator from block 5 are received in the matrix 9, which is connected to the signal input of the public key 7. The arrival of sound vibrations of the same frequency the LED lasts while the interval of sound is from the color cell of the format-frame in dark gray cells to the brown cell, which determines the end of the duration of the sound. The distribution of blocks of 6 keys in octaves and steps of the scale, the connection of LEDs to the outputs of keys 7 in blocks 6 of the keys and the outputs of block 5 of the sound frequency generators to the inputs of the keys in blocks 6 are given in table 4. From the outputs of the keys 7, sound vibrations are fed to the inputs of the corresponding pulse LEDs with three parameters: sound frequency from the sound frequency generator of block 5, the volume level, respectively, of the code received from the color-code converter, and the duration of the sound specified by the author of the work when entering it in the forms T-frame. The sound volume level is realized by the multiplicity of filters on the emitting sides of the pulsed LEDs in the matrices 9 _1-4 , FIG. 2. The sound timbre / coloring with accompanying sounds / is performed by the influence of frequency differences, differences in the volume of sounds of these frequencies from the sound frequency generators of unit 5, simultaneously and simultaneously concomitant with each other when played by their speakers Gr _1-4 , FIG. 2.

The operation of the device.

Creating tables on the laptop screen is performed in Word 2007/2010 / [9, p. 385]. The author creates a piece of music by sequentially filling out format-frame tables. The table of format frames is selected from ready-made templates [9, p. 385, 387]. Before filling, the table was displayed on the laptop screen. Using the mouse on the selected table template, forty-two rows with a width of 4 mm and forty columns also with a width of 4 mm are executed in it, rows in the table are denoted by numbers 1 to 42, columns are denoted from the first to fortieth Latin letters from A to AN [12, p . 354]. Now each cell has an individual address. Then all the cells of the table are filled with dark gray so that they are not visible, with the density of vision distinguishing separately between rows, columns and cells. Entering sound parameters: according to the frequency of the first sound known to the author in the table, a line is taken of the same frequency of the scale level in octave / do-re-mi-fa-sol-la-si /. The first cell included in the duration of the first sound is colored according to the volume level of the first sound / table. 1 /, then, according to the duration of the sound, the author counts, starting from the color cell, taking into account the sound of the cell 50 ms, the number of dark gray cells on the line and the last cell is colored brown, resulting in three sound parameters: frequency, volume level and sound duration listed in the row of the table. If there are free cells left in the line, the author enters the parameters of the second sound if it has the same frequency. If some of the sound parameters fit in the row of the first table, then their continuation is done on the same row in the next table. The process of entering parameters of the following sounds is the same. After filling in the whole table, the sheet number is assigned to it, and it is loaded into the file-format created for the tables. The number of tables is determined by the duration of the piece of music. The performance of a work can be listened to immediately after the last table is entered in the file; there is no need for a musician-performer. To play music in a laptop, the process of sequentially displaying format-format tables on the laptop screen is set. When a format-frame appears on the screen, its image is scanned by a matrix of color-code converters of coding unit 2. The cells of each column are scanned at a frequency of 20 Hz. The division ratio of the frequency divider 22 K = f _t : 20 Hz. Five-digit codes of volume levels from each column of color-code converters for 210 outputs from the coding unit 2 are sent in parallel to the control inputs U _from keys 7, in blocks 6 of the keys / Fig. 2 / one of the five keys opens. The signal inputs of the keys 7 from the corresponding outputs of the block 5 of the sound frequency generators receive sinusoidal vibrations of sound frequencies of the same amplitude, representing the frequencies of the steps of the scale / do-re-mi-fa-sol-la-si /. From the outputs of the public keys 7, sound vibrations arrive at the inputs of their LEDs in matrices 9 _1-4 , which translate sound vibrations in the brightness of the LED emissions according to the values of the codes for volume levels / table. one/. Matrices 9 ₁ and 9 ₂ each contain 70 white LEDs, the inputs of the LEDs of matrix 9 _{1 are} connected to the outputs of the keys 7 in blocks 6 _{1-14 of the} keys / Fig. 2 /, the inputs of the LEDs of the matrix 9 _{2 are} connected to the outputs of the keys 7 in blocks 6 _15-28 . Matrices 9 ₃ and 9 ₄ contain 35 LEDs. The LEDs of the matrix 9 _{3 are} connected to the outputs of the keys in blocks 6 of _29-35 keys, the LEDs of the matrix 9 _{4 are} connected to the outputs of the keys in blocks 6 of _36-42 keys. Each LED in the matrices 9 _1-4 on the emitting side has a neutral filter with a radiation attenuation coefficient corresponding to the weight of the discharge, in which there is a key connected to the input of this LED. In matrices 9 ₁ and 9 ₂ they can simultaneously emit from 14 and fewer LEDs, in matrices 9 ₃ , 9 ₄ they can simultaneously emit from seven or less LEDs. Photodetectors 11 _1-4 convert the total radiation of each matrix of 9 LEDs into audio signals of sound frequencies, which, after amplification in operational amplifiers 12 ₁₄ , which have a high frequency bandwidth and provide an output voltage equal to zero at zero input, are fed to the inputs of amplifiers 13 _{1 -4} powers, from the outputs of which they enter their loudspeakers Gr _1-4 , reproducing a musical work. The proposed method of creating musical information may be of interest to laptop users, since a musician performer is not required to play a piece of music.

Information sources

1. V.I. Astakhov. Musical instrument. Directory. Minsk. Modern School, 2011, p. 1-5.

2. "Simple gamma." The device of the musical scale. G.E. Shilov, State Publishing House of Physics and Mathematics. M., 1963

3. A guide to broadcasting. A.V. Native Kiev, 1981, p. 200 tab. 26.

4. Radio broadcasting and electroacoustics. A.V. Born, M., Radio and Communications, 1989, p. 32.

5. Piezoelectronics. Plonsky A.F., Tearo V.I. "Knowledge", 1973, p. 26, 27.

6. B.N. Runners. N.P. Zakaznov. Theory of optical systems. M., 1973, p. 223.

7. V.N. Tutevich. Telemechanics, 2nd ed. M., 1985, p. 216.

8 D.V. Native; IN AND. Kovalenko, M.T. Kokhno. Sound and television broadcasting. M., 1987, p. fifteen.

9. Leontiev V.P. The latest encyclopedia. Computer and the Internet 2013. M., OLMA, 2012, p. 385, 386, 387.

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Claims (2)

1. A method of creating a musical work by entering musical information as part of three sound parameters: frequency / pitch / sound, sound volume level and duration thereof, onto a medium for reproducing a musical work, characterized in that the musical information is represented by format-format tables that are identical spreadsheets from the Word 2007 collection and express-table menu, the number of tables corresponds to the duration of the musical work, the format-table is created in the center of the working field laptop screen horizontal 160 mm, containing 40 columns, each 4 mm wide, 168 mm vertical, containing 42 horizontal lines, each 4 mm wide and each representing one step of sound / do-re-mi-fa-sol-la- s / in the large, small octaves and in the first, second, third and fourth octaves, 40 columns and 42 rows are formed at the intersection of 1680 square cells 4 × 4 mm, which in the initial state are dark gray, the method of creating a musical work includes :
- creating a spreadsheet format frame on the laptop screen,
- filling in the cells in each spreadsheet spreadsheet row by row from left to right along the line and from top to bottom with musical information about three parameters of each sound: frequency / pitch / sound, sound volume level with a five-digit code and sound duration - sequence of cells in the row: first cell, colored in color, respectively, in the sound volume, behind it are cells of a dark gray color, the last cell in the duration of the sound is always brown, in total make up the duration of the sound,
- and loading the filled table format-frame into the corresponding file of the laptop,
reproduction of a musical work includes:
- inclusion in the laptop of the process of sequential output of format-format tables from a file to the center of the screen field with a frequency of 0.5 Hz,
- scanning by the coding unit of each table of the format-frame from the laptop screen for two seconds to issue codes of the sound volume level to the first control inputs U _{from the} key blocks,
- receipt of sinusoidal vibrations of sound frequencies from the outputs of the block of generators of sound frequencies through public keys to the inputs of the matrix of pulsed LEDs in the first and fourth channels of music playback. 2. Device for implementing the method - a device for reproducing musical information containing a laptop, characterized in that it includes a coding unit, a block of sound frequency generators, from the first to forty-second blocks of keys, each of five keys, and the first and fourth channels for playing a musical work, the encoding unit includes an opaque case attached by four screws close to the laptop screen body, a matrix of 1680 color-code converters located opposite the laptop screen, having a size vertically 168 mm, horizontally 160 mm, the color-code converters are identical, each containing an opaque housing, in the input window of which there is an opaque microfilter attached to the free end of the micropiezoelectric element, the second end of which is rigidly fixed in the converter housing and is a control input the color-code converter, a lens is attached to the microfilter in the baffle of the housing, for which, along its optical axis and at an angle of 45 ° to it, sequentially one after another at equal distances the first and fifth semitransparent micromirrors are located and rigidly fixed, each of which transmits two times weakened radiation to the next micromirror, for which each micromirror has a beam splitting coating, which fulfills the ratio of reflected radiation to transmitted as 1: 0.5, on the side of the body in the places of radiation reflected from micromirrors, the first and fifth photodetectors are located, each of which has a color filter in the sequence on the receiving side: the first photodetector has a purple light liter, the second is a green filter, the third is a red filter, the fifth is a yellow filter, the sixth detector has a brown filter and is located on the housing opposite the lens and after the fifth micro-mirror, the output of each photodetector is connected to the input of its pulse amplifier, the coefficients whose amplifications are equal, the color-code converter includes one five-digit register, the output of the first pulse amplifier is connected to the input of the first / senior / discharge register, the output is the second pulse amplifier is connected to the input of the second register bit, the output of the third pulse amplifier is connected to the input of the third register bit, the output of the fourth pulse amplifier is connected to the input of the fourth register bit and the output of the fifth pulse amplifier is connected to the input of the fifth register bit, the outputs of the first to fifth pulse amplifiers diodes together, the combined output is connected to the input U _vyd issuing five-bit code from the register, a sixth output signal U of the amplifier ₃ and fed to the second driving the inputs of the five keys in parallel to the key block containing each five keys, the coding block includes a scanning circuit containing a series-connected frequency divider, the input of which is connected to the clock bus conductor of the system bus in the laptop processor, and a pulse distributor having forty outputs for the number of forty pulse amplifiers , the output of each pulse amplifier is connected in parallel through diodes to the control inputs of the first to forty second color-code converters in each column of the matrix, the gene block speakers includes forty-two sound frequency generators, each of which produces sinusoidal oscillations of one of the forty-two sound frequencies of the steps of the scale of the large, small octaves and the first, second, third and fourth octaves, the control inputs of each of the five keys of forty-two key blocks are connected to the corresponding first to 252-th output / 42 × 6 / coding unit, second control input U ₃ forty-two blocks of keys connected to the output converters ₃ U "color code", key signal inputs of the first - twenty-eighth key blocks the first are connected to the first - twenty-eighth outputs of the sound generator block, the key signal inputs of the twenty-ninth - forty second key blocks are connected respectively to the twenty-ninth - forty-second outputs of the sound frequency generator block, the first, second music playback channels are identical, each includes a matrix of seventy pulsed white LEDs, the inputs of seventy pulsed LEDs of the first channel are connected to the key outputs in the first - fourteenth block keys, the inputs of seventy pulse LEDs of the second channel matrix are connected to the outputs of the keys in the fifteenth to twenty-eighth blocks of keys, each LED on the emitting side has a neutral filter with a radiation attenuation coefficient corresponding to the weight of the discharge, to which the key belongs, the output of which is connected to the input of this LED , the first and second playback channels each includes a lens, the optical axis of which coincides with the optical axis of the matrix of LEDs of its channel, a photodetector, laid in the focal plane of the lens, the output of the photodetector is connected to the input of the operational amplifier, the output of which is connected to the input of the power amplifier, the output of which is connected to the input of the speaker of its channel, the third and fourth channels of music playback are identical, each channel includes a matrix of thirty-five pulsed LEDs white radiation, the inputs of the pulsed LEDs of the matrix of the third channel are connected to the outputs of the corresponding keys in blocks of the twenty-ninth to thirty of the fifth key, each LED on the emitting side has a neutral filter with a radiation attenuation coefficient corresponding to the weight of the discharge, to which the key belongs, connected to the input of this LED, the inputs of the pulse LEDs of the fourth channel matrix are connected to the outputs of the corresponding keys in thirty-six to forty-two key blocks, each LED on the emitting side has a neutral filter with a radiation attenuation coefficient corresponding to the weight of the discharge to which the key belongs The third and fourth channels, each coming to the input of this LED, include a lens whose optical axis coincides with the optical axis of the LED matrix of its channel, a photodetector located in the focal plane of the lens, the output of the photodetector connected to the input of the operational amplifier, the output of which is connected to the input of the amplifier power, the output of which is connected to the input of your speaker.

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