SU1301423A1 - Music and colour device - Google Patents

Abstract

This invention relates to devices for automatically lighting music. The goal is to increase the expressiveness and depth of the spectacular effect of the color arrangement. For this purpose, a power amplifier 8 and a distributor 7, as well as a dynamic development analyzer 10 (ADR) are inserted into each channel of the amplitude-frequency converter unit. In the description of the invention, an ADR circuit is shown. 2 h. the item of f-ly, 4 ill. (L O5 N5 00 Figure 1

Description

The invention relates to devices for the automatic lighting of music and can be used in concert halls, rest rooms, in the interiors of buildings for decorative purposes and to increase the emotional perception of music.

The aim of the invention is to increase the expressiveness and depth of the spectacular effect.

FIG. 1 shows a functional diagram of the color music device; in fig. 2 - the dynamic range of the envelope of the audio signal, which corresponds to the dynamic range of the flow of light sources; in fig. 3 shows the arrangement of the groups of light sources of one channel on the screen; in fig. 4 - functional diagram of the dynamic development analyzer.

The color organ installation (Fig. 1) contains the source 1 of a stereo signal, the first and second inputs of which are connected to the input of the first 2 and second 3 amplitude-frequency converter units, each of which consists of n parallel channels containing each successively connected filters 4-1 -4-3, detectors 5-1-5-3, integrators 6-1-6-3, distributors, the first - the third outputs of which are connected to the inputs of the first - third amplifiers 8-1-8-9 of the power associated with the corresponding sources 9-1-9-9 light. The first and second inputs of the analyzer 10 dynamic development are connected to the corresponding inputs of the source 1 of the stereo signal, and the output with the second inputs of the integrators 6-1-6-3 of each channel of blocks 2 and 3 of the amplitude-frequency converter.

The dynamic development analyzer 10 contains a frequency divider 11 and a series-connected adder 12, the first and second inputs of which are corresponding to the first and second inputs of the dynamic development analyzer 10, an additional detector 13, the first low-frequency filter 14, differentiator 15, trigger 16, charge unit 17, the second low frequency filter 18, the output of which is the output of the dynamic development analyzer 10, the frequency divider 11 input connected to the trigger output 16 and the output to the second input of the charging unit 17.

The device works as follows.

The audio signal from the outputs of the stereo 1 audio source is fed to the input of the first 2 and second 3 blocks, the amplitude-frequency converter, which perform the same

functions, namely the function of the incoming music signal in frequency and amplitude. Each of the n channels of the amplitude-frequency converter unit produces an amplitude analysis of signals in the frequency band, defined by band-pass filters 4-1-4-13, from the outputs of which the signal goes to the detectors 5-1-5-3, respectively, which are rectified incoming signal. The signal then passes to integrators 6-1-6-3, which reclaim it.

The second inputs of the integrators 6-1-6-3 simultaneously receive a signal from the output of the analyzer 10 dynamic development,

carries information about the degree of dynamism of a musical signal, and changes the time constant of integrators 6-1 to 6-3 as follows: the faster the music, the greater the voltage at the second input of the integrators 6-1-6-3 and the less constant integration time.

This control allows integrators 6-1-6-3 to automatically track with high precision for dynamic

envelope in frequency and amplitude, which determines the direction of the melodic development of the analyzed piece of music.

The signal, which is directly proportional to the strength of the sound and characterizes its dynamic nature, from the outputs of the integrators 6-1-6-3 is fed to the inputs of the distribution circuits 7-1-7-3, which separate the dynamic range of the input signal in such a way that on

Each of the three outputs of the signal is changed only by 15 dB. In this case, if the input signal level varies from 0 to 15 dB, a signal appears directly proportional to the input signal at the first output of the distributor. With further

by increasing the input signal from 15 to 30 dB, the voltage at the first output of the distributor does not increase, but the voltage at its second output increases from 0 to 15 dB. And further, if the voltage at the inputs of distribution circuits 7-1-7-3 increases from 30 to 45 dB, then at the second outputs the signal does not increase, and the voltage value at the third outputs of the distributors 7-1-7-3 from O up to 15 dB.

The voltage from the outputs of the distributors 7-1-7-3 goes to the first - third power amplifiers 8-1-8-9, which control the luminous flux of the first, second and third groups of sources 9-1-9-9 of the light.

So, with increasing signal from O to

15 dB increases the light flux f | the first group of sources 9-1-9-9 light (Fig. 2). When the signal level reaches 15 dB, the first groups of sources 9-1-9-9 of light have

the maximum luminous flux Φ i max, which does not increase further, but the luminous flux Φ 2 of the second group of sources 9-1-9-9 of the light begins to increase. When the signal reaches 30 dB, the flux Φ has the maximum value. and does not increase further. With an increase in the input signal level from 30 to 45 dB, the light flux Fz of the third group of sources 9-1 - 9-9 of the light increases.

Since groups of sources 9-1-9-9 of light have different powers, the maximum luminous flux "ax of the first group of sources 9-1-9-3 should be equal to the minimum flux 2 of the second 9-1-9-3 group of light sources, and The maximum flux of the second group of sources, 9-1-9-3 of light, is equal to the minimum flux Fmim of the third group of sources, 9-1-9-3 of light.

Thus, the matching of the dynamic ranges of the musical signal and the total luminous flux of the screen is achieved, while it is also possible to linearize the total brightness characteristic of the sources 9-1-9-3 of the light.

FIG. Figure 3 shows a variant of the arrangement of groups of sources 9-1-9-3 of the light of one selection channel on the screen. When the sound intensity increases, the sources 9-1 of the first group of light come on; with a further increase of the sound intensity, the sources 9-2 of the light of the second group and then the third group 9-3, i.e. an effect similar to that of the Begush is observed, its fire - apparent movement of the light pattern upwards with simultaneous expansion of its area. The picture “unfolds and“ collapses on the screen in accordance with the change in sound intensity. Since the light fluxes of groups of sources 9-1-9-9 of the light are chosen so that the condition

1 W 1 max W 2 MI1TS I F 2 max F 3 min.

where f 1 max. F 2 max - the maximum luminous flux, respectively, of the first and second groups of sources 9-1-9-9 of the light;

F2MIN, Fzmaks- minimum luminous flux, respectively, of the second and third groups of sources 9-1-9-9 of light, then the rise of the light pattern occurs smoothly with the gradual ignition of sources 9-1 to 9-9 of the light of the first, second and third groups. The light pattern is poured from one group of 9-1-9-9 light sources to another group with a gradual upward movement.

In the proposed installation, by using n-channel amplitude-frequency transducers 2 and 3, the dynamic development of the picture (movement) is also carried out depending on the pitch, since the groups of sources 9-1-9-9 of the light that are part of the allocation channels, distributed in different places on the screen.

In addition, groups of sources 9-1-9-9 light connected to the outputs of the first 2

and the second 3 amplitude-frequency converters are located so that there is no clear spatial boundary between them in the central part of the screen, as a result, the interpenetration of the color-dynamic patterns of amplitude-frequency converters 2 and 3 into each other is achieved.

The operation of the dynamic development analyzer 10 is based on measuring the time between the minima and the maxima of the envelope of the music signal. The higher the tempo of the music and the higher the rate of rise and fall of the envelope (as determined by the gradual or sudden change of parts of the musical work), the shorter the time between successive minima and the maximum of the envelope of the sound signal.

An exemplary embodiment of the dynamic development analyzer 10 is shown in FIG. 4. The signal from the first and second output of the stereo 1 audio source (Fig. 4) is fed to the first and second inputs of the adder 12 which produces a summation of the signals of the first and second channels of the stereo 1 sound source, turning them into a mono signal. The last is rectified by the detector.

5 13 and enters the first low-pass filter 14, which produces an envelope formation. sound signal. Further, the envelope undergoes differentiation in the differentiator 15, at the output of which a sequence of positive and negative pulses is formed, corresponding to the minima and maxima of the envelope. These pulses arrive at trigger 16 which generates rectangular pulses with a duration equal to the time between positive and negative

5 pulses. The higher the tempo and the more dynamic the music, the more often the pulses from the output of trigger 16 follow, and the shorter the duration they have. These square pulses come from the output of the trigger 16 to the charging circuit 17 and divider 11. At the output of the charging circuit 17, a linearly increasing voltage is generated at the moments of the presence of the square pulses at the second input. With the end of the action of a rectangular charge pulse, the circuit remembers the voltage until the next pulse arrives and then starts charging again.

After the arrival of a certain number of pulses, for example 1000, determined by divider 11, a zeroing pulse is generated at the output of divider 11, and the accumulated voltage on the charging circuit 17 is reset at the second input. Thus, the charging circuit forms a voltage proportional to the action time of 1000 pulses. If, for example, music is slow, smooth, then the voltage at the output of charging circuit 17 is more important than with fast, dynamic conduct. Pulsations from the output of the charging circuit 17 are smoothed by the integrator 18.

As a result, a constant voltage proportional to the tempo and dynamics of the piece of music is generated at the output of the dynamic development analyzer 10. This voltage goes to the second inputs of the integrators 6-1-6-3 and changes the integration time constant in accordance with the dynamics of the music signal, which makes it possible for the integrator 6-1-6-3 to track the sound envelope more precisely.

As a stereo audio source 1, a tape recorder is used, for example.

Band-pass filters 4-1-4-3 are made on chips according to the scheme (Fig. 1).

Detectors 5-1-5-3 assembled on chips.

Integrators 6-1-6-3 are assembled on the same microchips using field-effect transistors.

The distribution circuit 7-1-7-3 consists of three parallel-connected limiting amplifiers made on transistors.

Power amplifiers 8-1-8-9 are made on thyristors. The screen is made, for example, of two rows of perpendicularly arranged transparent cylindrical tubes. For example, incandescent lamps, connected in parallel, were used as a source of 9-1-9-9 light of various powers.

The adder 12, the detector 13, the first low-pass filter 14, the differentiator 15, the charging circuit 17 and the second low-pass filter 17 can be performed on the operational amplifiers, and the trigger 16 and the divider 11 on the digital microcircuits:

Claims (3)

Invention Formula I. A color-music device containing a stereo source, the first and second inputs of which are connected to the input of the first and second amplitude-frequency converter units, each of which consists of n parallel channels, and each of the channels contains the first power amplifier, the output of which is connected to the first group of light sources, and a series-connected band-pass filter, the input of which is the input of the unit., a detector, integrator, characterized in that, in order to increase the Spines and depths of spectacular effect, introduced into each channel  the amplitude-frequency converter unit of the second, third power amplifiers, respectively the second and third groups of light sources connected to the outputs of the second and third power amplifiers, the distributor whose input is connected to the integrator's output, and the first, second, third outputs the inputs of the first, second, third power amplifiers, respectively, and the dynamic development analyzer, the first and second inputs Which is connected to the corresponding input of the stereo signal source, and the output to the second input of the integrator of each channel of the amplitude-frequency converter unit. five 2. A device according to claim 1, characterized in that the dynamic development analyzer comprises a frequency divider and a series-connected adder, the first and second inputs of which are corresponding to the first and second inputs of the dynamic growth analyzer, the additional detector, the first low-pass filter, the differentiator, the trigger charge block, the second low-frequency filter, the output of which is the output of an analyzer for dynamic development, the input of the frequency divider connected to the trigger output and the output to the second input ohm charging unit. 3. The device according to claim 1, characterized in that the first groups of light sources 0 located at the bottom, the second group of light sources - in the middle part, and the third - in the upper part of the screen.