JPS62140508A - Motor driven sound volume regulator - Google Patents

Abstract

PURPOSE:To execute a natural fade processing as an audible sense and an instantaneous cut processing by providing an operator movement control means for moving electrically an operator by a motor, a mode designating means, and a switching means. CONSTITUTION:Data which is inputted from a storage device moves a slider part 13b to a desired position, and also controls directly a VCA circuit, and this data is latched by a data latching circuit 24, and supplied to the second D/A converter 42. Said data is converted to an analog voltage signal by the second D/A converter 42, and thereafter, outputted as a control signal to the VCA circuit, and simultaneously, supplied to a differential amplifier 30 together with a voltage signal from the first D/A converter 28. A linear pulse motor 13 is brought to a driving control, and the slider part 13b moves to an object position. When it reaches a target position, a reset signal and a driving stop command signal are generated, therefore, a switch 29 is controlled so that a movable terminal (c) is connected to a fixed terminal (a), and the gain of the VCA circuit can be set to a desired gain instantaneously.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is an electric volume 5! used for sound adjustment consoles, etc. The present invention relates to adjustment devices, and particularly to improvements in fade-in/fade-out and cut-in/cut-out control means.

[Prior Art] As is well known, for example, a studio sound adjustment console has a plurality of channel inputs, and after adjusting the level of each input using an electric sound adjustment device, it is possible to appropriately mix and output the inputs. Generally, this type of electric volume adjuster has a slide-type operating device, and the slide control device is electrically moved based on external input data to adjust the sound level.
It is now possible to perform i-adjustment automatically. That is, for example, adjustment data is stored in advance using a storage device such as a computer, and based on this adjustment data: 3! By controlling the operation of the J adjuster, the strength of the sound can be automatically reproduced.

By the way, the sound adjustment console above has a volume of A'! There are two modes in fl. One mode is called fade-in/fade-out, which increases or decreases the volume level relatively slowly.

The other mode is called cut-in/cut-out, in which the volume level is raised or lowered to a predetermined level at very high speed.

However, in the fade-in/fade-out mode, the more data is sampled per unit time, the more accurate the adjustment becomes. However, since the storage capacity of the storage medium is limited, as the number of data per unit time increases, the adjustable time becomes shorter. On the other hand, if the number of times data is sampled is small, the reproduced sound will be reproduced in a stepped manner, resulting in an unnatural sound. In addition, in the case of cut-in/cut-out mode, the rise and fall speeds are determined by the drive capacity of the motor that moves the operator, so it is necessary to use a large motor with high drive capacity. In addition, the motor drive circuit must also have a large circuit scale with a large power supply capacity.

The second invention was made to improve the above-mentioned problem, and in the fade-in/fade-out mode, even if the number of data is reduced, the volume is continuously changed to improve the audibility. 2. To perform natural fade processing. can be cut in ψ
It is an object of the present invention to provide an extremely good electric volume adjuster that can instantly perform cut processing in cutout mode without using a large motor mechanism that consumes a lot of power.

[Means for Solving the Problems] That is, the electric volume adjuster according to the present invention adjusts the output level of the acoustic signal to 21 by moving the position of the operator, and adjusts the output level of the acoustic signal to 21 based on external input data. The adjustment is automatically performed by controlling the movement of the operator, which comprises: operator movement control means for electrically moving the operator with a motor; and a movement control speed amount 1- of the operator movement control means. mode designating means for adding a designation of a high-speed control mode for adjusting the volume based on speed to the external input data; and when the designation of the high-speed control mode is added to the external input data, the volume adjustment is performed using the external input data The present invention is characterized by comprising a switching means for switching directly.

[In other words, in the fade-in/fade-out mode, this electric volume adjuster uses the operating speed of the motor to move smoothly with a small amount of data, so as to perform fade processing that is audibly natural. cut in·
In the cutout mode, the circuit operation is switched to directly adjust the volume: JS using the input data, thereby increasing the rise speed and fall speed and perform cut processing instantly.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

That is, the drawings show the structure thereof, and numeral 11 in the drawings is a slide operation mechanism section. First, this slide machine (1'
Part 4 11 will be described. That is, 12 in the figure is a panel plate attached to a chassis (not shown). A guide hole 12a extending linearly is formed in this panel plate 12, and a scale portion 1 is provided at the bottom of this panel plate 12 in the figure.
3a and a part of the slider 13b (linear)
A pulse motor 13 is arranged. Of these, the scale portion 13a is formed into a rectangular parallelepiped shape using a metal such as an iron plate.
Teeth for taking in lines of magnetic force are cut at a predetermined pitch in the center of the back surface in the longitudinal direction, and are fixed to the chassis in parallel to the guide holes 12a of the panel plate 12. Although not shown, the slider portion 13b has a hybrid three-layer structure including a table, a permanent magnet, and two electromagnets. A plurality of rollers 14a and 14b (two in the drawing) are rotatably attached to the side surface, and an L-shaped plate 15 is attached to the rotation shaft thereof. In other words, the slider part 13b is
a, 14b and the scale part 1 is attached by the plate 15.
It is attached to the scale part 13a so as to be slidable in the longitudinal direction of the scale part 13a so as to sandwich the scale part 3a. In the above-mentioned installation, the operator 16 with a touch sensor is integrally fixed to the upper part of the panel 15 so as to protrude above the panel plate 12 through the guide hole 12a of the panel [12].

Further, a position display plate 17 is attached to the bottom of the slider portion 13b so as to be parallel to the scale portion 13a in the longitudinal direction. This position display board 17 is made of, for example, a film or the like to form a light shielding part for position detection using a gray code and a light shielding part for fault detection. It is configured to pass according to the movement of the slider portion 13b. In other words, with this photo coupler 18, the position display board 1
By reading the gray code from 7, the current position of the operator 1B (that is, the slider portion 13b) can be detected. Note that the gray code is set corresponding to a control voltage level for a VCA circuit for volume adjustment, which will be described later.

Next, the configuration of the control circuit and signal processing circuit of the slide operating device 12 will be explained.

First, the operator 16 is connected to a touch sensor 19, and when the touch sensor 19 detects that a hand touches the operator 16, it outputs an H (high) level detection signal. This detection signal is led out to a main operation control device (not shown) to be described later through an output terminal 20, and is also sent to a latch circuit 22, an acceleration control circuit 23, and a second data latch circuit 24 as a reset signal through an OR gate circuit 21. is supplied to the waveform shaping circuit 25 as a drive stop command signal. On the other hand, the gray code signal detected by the photocoupler 18 is sent to the code converter 26.
after being converted into a binary code signal by the first data latch circuit 27 and the first digital analog (
D/A) converter 28. This D/A converter 2
Reference numeral 8 generates a voltage signal corresponding to the input code signal indicating the position of the operator 16, and this voltage signal is led out to the fixed terminal a of the analog switch 29, and also to one input terminal of the differential amplifier 30. is supplied to

Here, in the figure, 31 to 35 are terminals connected to the storage device, 31 is a fade/cut control signal input terminal for selecting and controlling the fade mode and cut mode, 32 is an address input terminal, and 33 is a data read timing pulse. Input terminals 34 are data request signal input terminals, and 35 are data input/output (I10) terminals. The fade/cut control signal input from the terminal 31 is supplied to the AND gate circuit 3B, and the address signal input from the terminal 32 is supplied to the AND gate circuits 38 and 39 via the address matching circuit 37. Further, the data read timing pulse signal input from the terminal 33 is supplied to the AND gate circuit 38, and the data request signal input from the terminal 34 is supplied to the AND gate circuit 39. The output of the AND gate circuit 38 is used as an input control signal for the AND gate circuit 36 and the acceleration control circuit 23.
, to the bidirectional path buffer circuit 40, and also to the second data latch circuit 24 as a latch signal.

The output of the AND gate circuit 39 is supplied as an output control signal to the bidirectional pass buffer circuit 40, and is also supplied to the data latch circuit 27 as a control signal for switching the output control state. The data latch circuit 2 as a latch signal via
7. The acceleration control circuit 23 is activated when the address from the storage device matches the timing pulse, and linearly increases the output voltage.

The output of the AND gate circuit 3B is latched by the latch circuit 22, and is used as a switching control signal for the analog switch 2.
9 control terminals. Further, the data supplied to the first data latch circuit 27 is latched by a latch signal from the AND gate circuit 41, and then supplied to the bidirectional pass buffer circuit 40 and the second data latch circuit 24. When the bidirectional pass buffer circuit 40 is supplied with an output control signal from the AND gate circuit 39, it derives the data from the first data latch circuit 27 to the storage device via the terminal 35, and inputs the data from the AND gate circuit 38. When a control signal is supplied, data from the storage device input via the terminal 35 is led out to the second data latch circuit 24. The data latch circuit 24 latches input data in response to a latch signal from the AND gate circuit 38 and sends the data to the D/A converter 42. This D/A converter 42 generates a voltage signal according to input data, and this voltage signal is led out to the other fixed terminal of the analog switch 29 and the other input terminal of the differential amplifier 30. is supplied to The analog switch 29 selectively connects the movable terminal C to the fixed terminal a or b in response to a switching control signal from the latch circuit 22, and the voltage signal selected by the analog switch 29 is transmitted through the terminal 43. The signal is output as a control signal to a VCA circuit (not shown).

On the other hand, the differential amplifier 30 detects the differential voltage between the voltage signals from the first and second D/A converters 28 and 42, and this differential voltage is sent to the full-wave rectifier circuit 44. This full-wave rectifier circuit 44 takes the absolute value of the input differential voltage, aligns the polarities, and outputs it to the first comparator 45.

This first comparator 45 detects that the output level of the full-wave rectifier circuit 44 has become below the minimum resolution, and its detection output is supplied to the other input terminal of the OR gate circuit 21. Further, the output signal of the differential amplifier 30 is sent to a second comparator 4G, where the polarity is detected. That is, the output of the comparator 46 is used to determine the traveling direction of the linear pulse smoke, and is supplied to the waveform shaping circuit 25 as a phase control signal. Furthermore, the output voltage of the full-wave rectifier circuit 44 is supplied to a deceleration control circuit 47. This deceleration control circuit 47 controls the speed control signal from the acceleration control circuit 23 according to the output level of the full-wave rectifier circuit 44, and linearizes the deceleration rate. The signal is supplied to circuit 48.

This vCO circuit 48 changes the oscillation frequency according to the voltage level of the input control signal, and the frequency signal generated here is supplied to the waveform shaping circuit 25. This waveform shaping circuit 25 shapes the output of the vCO circuit 48 into a sine wave, and cuts off the output in response to a drive stop command signal from the OR gate circuit 21. Then, the drive signal waveform-shaped into a sine wave is outputted to the first power amplifier 49 as a first drive signal (0'), and the ±90 ``This is phase-controlled and outputted to the second power amplifier 50 as a second drive signal.

The output of the first power amplifier 49 is the output of the slider part 1.
3b, and the output of the second power amplifier 50 is supplied to the other electromagnetic coil (not shown).

The fault detection signal read from the position display board 17 by the photocoupler 18 is supplied to the other input terminal of the fault detection circuit 51 and the AND gate circuit 41. The failure detection circuit 51 prevents the linear pulse motor 13 from stepping out of synchronization and cannot be started when the operation of the operator 16 or the like is obstructed for some reason. This is to send a start signal and restart the device. Actually Linear Pulse Smoke 1
When the moving direction of the motor 3 and the direction indicated by the comparator 4G do not match, it is determined that a failure has occurred and a restart signal is generated. When a linear pulse motor loses its synchronization, it vibrates and the direction of movement becomes unstable, generating a reverse direction signal, so this circuit is essential when using a linear pulse motor.

The electric volume adjuster configured as described above is connected to a main operation control device (not shown) that collectively controls a plurality of adjusters and a storage device. This main operation control device is provided with a memory switch for setting a storage period, a playback switch for setting an automatic adjustment state, and the like. Here, when the memory switch is set to the ON state, if the operator 16 is not touched by a hand, the regulator enters the cut-in/cut-out mode and sends a cut control signal to the memory device, and If it is, the fade-in mode becomes the fade-out mode and a fade control signal is sent to the storage device. On the other hand, the storage device enters the write state when the storage switch is set to the on state, and! The cut control signal or fade control signal sent from the + The control signal or fade control signal and storage data are sent to the above-mentioned predetermined terminals of the regulator together with an address signal and a data read timing pulse.

The operation of the above configuration will be described below.

First, in the case of manual adjustment, the user simply touches the operator 16 to set the manual Xi adjustment mode.

That is, when adjusting the level of the sound signal by manually moving the operator 16, when the user touches the operator 16, the touch sensor 19 detects this and the latch circuit 2
2. Acceleration control circuit 23 and second data latch circuit 24
A reset signal is sent to the waveform shaping circuit 25, and a drive stop command signal is sent to the waveform shaping circuit 25, so that the slide operation mechanism section 11 is electrically disconnected. As a result, the operator 1B,
In other words, the slider portion 13b can be slid extremely lightly. When this slider part tab is moved, the position display board 17 moves integrally, so that the gray code digital data detected by the photo coupler 18 changes sequentially in accordance with this movement, and the code converter 26
and is converted into binary code digital data.

Here, if it is desired to memorize the contents of the manual operation, the memory switch of the main operation control device is set to the on state. Then, the storage device enters the writing state, and if the operator 16 is not touched, the regulator enters the cut-in/cut-out mode and outputs a cut control signal, and if the operator 1B is not touched It becomes a fade-in/fade-out mode and outputs a fade control signal.

Here, the storage device set to the write state is the terminal 32.
34 respectively, and sends an address signal and a data request signal to them. Then, a latch signal is sent to the first data latch circuit 27, and an output control signal is sent to the bidirectional path buffer circuit 40. Therefore, the code conversion circuit 26
The data outputted from the data latch circuit 27 is latched by the data latch circuit 27, and is led out to the storage device via the bidirectional pass buffer circuit 40 and the data I10 terminal 35. In other words, the storage device set to the write state stores the cut control signal or fade control signal sent from the regulator side together with the data from the terminal 35.

On the other hand, the digital data output from the code conversion circuit 26 is converted into a voltage signal by the first D/A converter 28 and then output to the fixed terminal a of the analog switch 29. The analog switch 29 is configured such that the movable terminal C is connected to the fixed terminal a when the latch circuit 22 is in a reset state. Therefore, the voltage signal from the first D/A converter 28 led to the analog switch 29 is selected by the analog switch 29 and then supplied to the VCA circuit via the output terminal 43 to adjust the level of the acoustic signal. served.

Next, the automatic adjustment processing means will be explained. First, the regeneration switch of the main operation control device is set to the on state. The storage device then enters the read state, and the terminals 31.3
A fade control signal or cut control signal, address signal, data read timing pulse, and stored data are sent to 2, 33, and 35, respectively. If the signal input to the terminal 31 is a fade control signal, this fade control signal is latched by the latch circuit 22 and supplied to the analog switch 29 as a switching control signal. At this time, the analog switch 29 connects the movable terminal C to the fixed terminal a.
controlled to connect to. Therefore, the first D/
A voltage signal output from the A converter 26 is output as a control signal for the VCA circuit. On the other hand, the bidirectional path buffer circuit 40 is supplied with an input control signal, and the second data latch circuit 24 is supplied with a latch signal. Therefore, the data input from the terminal 35 is sequentially latched by the data latch circuit 24 via the bidirectional path buffer circuit 40, and then converted into a voltage signal by the second D/A converter 42, and then the data is input to the differential amplifier. 30. A voltage signal from the first D/A converter 28 is supplied to the other input terminal of the differential amplifier 30, and the differential amplifier 30 detects and outputs the difference voltage between the two. The level of the voltage signal obtained here corresponds to the distance between the current position of the operator 1B and the position specified by the data from the storage device, and its polarity indicates the direction of the target position. Therefore, the polarity of the voltage difference is determined by the second comparator 46 to generate a phase control signal corresponding to the motor drive direction. On the other hand, since an activation signal is generated in the AND gate circuit 38, the acceleration control circuit 23 receives this activation signal and increases the output voltage linearly, thereby raising the oscillation frequency of the VCOM path 48.

As a result, the slider portion 13b moves toward the target position and accelerates.

On the other hand, as the slider portion 13b approaches the target position, the output of the differential amplifier 30 gradually decreases, so the output of the full-wave rectifier circuit 44 also decreases.

The deceleration control circuit 47 detects that the output level of the full-wave rectification circuit 44 is below a predetermined level, draws in the voltage signal output from the acceleration control circuit 23, and outputs the voltage signal to the vCO circuit 48.
oscillation frequency. For this reason, some sliders +
3b is decelerated as it approaches the target position. When the slider part 13b reaches the target position and the output of the full-wave rectifier circuit 44 becomes zero level, the comparator 45
It works, or game! - A reset signal and a drive stop command signal are generated via the circuit 21. Therefore, the slider portion 13b completely stops at the 1'' position.

In this way, by moving the slider part 13b of the linear pulse motor 13, the display board 17 moves integrally, and the data read out changes continuously, so this digital data can be converted into analog data. The generated voltage signal can continuously change the control gain of the VCA circuit. In this case, it is only necessary to input the fade control signal and the number of data in consideration of the speed of movement of the motor to the target position from the storage device, so that the amount of stored data can be extremely reduced.

Next, when the signal supplied to the terminal 31 is a cut control signal, this cut control signal is latched by the latch circuit 22, and the analog switch 29 is latched as a switching control signal.
is supplied to As a result, the analog switch 29 is controlled to connect the movable terminal C to the fixed terminal S. At this time, the data input from the storage device is data that moves the slider portion 13b to a desired position and directly controls the VCA circuit, and this data is passed through the bidirectional path buffer circuit 40 to the data latch circuit 24. The signal is latched and supplied to the second D/A converter 42. Then, in this second D/A converter 42, the analog voltage i +:
After being converted, the signal is output as a control signal to the VCA circuit via the switch 29, and at the same time, it is supplied to the differential amplifier 3° together with the voltage signal from the first D/A converter 28. Therefore, the linear pulse motor 13 is driven and controlled in the same manner as in the fade process, and the slider portion L3b comes to move to the target position. When the target position is reached, a reset signal and a drive stop command signal are generated, so that the switch 29 is controlled so that the i+J moving terminal C is connected to the fixed terminal a, returning to the initial state. In other words, in the cut process, data from the storage device is directly transferred to the VCA.
Since the circuit is controlled, the gain of the VCA circuit can be instantly set to a gain of 81.

Therefore, −[−
The dg controls the amount of data according to the motor's drive capacity during fade processing, and adjusts the volume directly using data from the storage device during cut processing, so the amount of data per unit time is small. Furthermore, a motor with a small driving capacity can be used, thereby reducing power consumption and downsizing the motor drive circuit.

[Effects of the Invention] As detailed above, according to the present invention, fade-in and
In fade-out mode, even if the number of data is small, the volume can be changed continuously to perform natural fade processing, and in cut-in/cut-out mode, a large motor mechanism that consumes a lot of power is used. It is possible to provide an extremely good electric volume adjuster that can instantly perform cutting processing without any hassle.

[Brief explanation of drawings]

The drawing is a block circuit configuration diagram showing an embodiment of an electric volume adjuster according to the present invention. 11... Slide operation mechanism section, 12... Panel board,
13...Linear pulse motor, 13a...Scale part, 13b...Slider part, 14a, 14b.
...Roller, 15...Mounting plate, 16...Operator,
■7...Position display board, I8...Photocoupler, 1
9... Touch sensor, 20... Touch sensor output terminal, 22... Latch circuit, 23... Acceleration control circuit,
24... Second data latch circuit, 25... Waveform shaping circuit, 26... Code conversion 2;, 27... First data latch circuit, 28... First D/A conversion vessel, 2
9... Analog switch, 30... Differential amplifier, 3
1...Fade/cut control signal input terminal, 32...
・Address input terminal, 33...Data read timing pulse input terminal, 34...Data request signal input terminal, -35...Data input/output terminal, 37...Address matching circuit, 40...Bidirectional pass buffer circuit,
42... Second D/A converter, 43... VCA control signal output terminal, 44... Full wave rectifier circuit, 45.4Ei
...Comparator, 47...Deceleration control circuit, 48.
・・VCO circuit, 49° 50・・Power amplifier, 5■・
...fault detection circuit.

Claims (1)

[Claims] The electric volume adjuster adjusts the output level of the acoustic signal by moving the position of the operator, and automatically performs the adjustment by controlling the movement of the operator based on external input data, A mode that adds to the external input data a designation of an operator movement control means for electrically moving the operator using a motor and a high-speed control mode in which the volume is adjusted at a speed higher than the movement control speed of the operator movement control means. An electric volume adjuster comprising: a designation means; and a switching means for switching the volume adjustment to be performed directly using external input data when the high-speed control mode designation is added to the external input data. .