JPH05217273A - Effect sound generation device for acoustic disk - Google Patents

Abstract

PURPOSE:To generate an effect sound even while playing a CD. CONSTITUTION:A clock whose period differs according to the rotational speed of a track ball 38 is outputted to a shift register 22 from an address control circuit 31 and the reading speed of the audio data of the shift register 22 is varied. Thus, since the reproduction speed of a CD reproducing sound is varied manually, the effect sound is generated. By providing an RIAA recording equalizer 21 and an RIAA reproducing equalizer 23, atmosphere nearly equal with the reproducing time of an analog record is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound effect generating device for an audio disk which can manually change the reproduction speed of CD reproduction sound.

[0002]

2. Description of the Related Art A recorder using an analog recorder player
When playing a disc, the disc mug is called scratching, which produces a sound effect called "shaky" by holding the recording surface with your hand and reciprocating while playing the disc. The method is heavily used.

However, the production of analog records has been steadily decreasing, which makes it difficult to obtain them. In place of this, CD players have become widespread, and it is desired to generate a sound effect by scratching during CD performance as well as during analog record performance.

By the way, the rotation of the analog record is several tens of minutes per minute, while the rotation of the CD is several hundred times per minute, so that it is impossible for a human to hold it by hand. Further, since the CD is recorded in a completely different method from the analog record in the signal form, it is impossible to generate a sound effect by a manual operation.

[0005]

[Problems to be Solved by the Invention]
In Y, there is a problem that it is impossible to generate a sound effect by performing scratching while playing a CD.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a sound effect generating device for an audio disk capable of generating sound effects even during CD performance. Is.

[0007]

In order to achieve the above object, the present invention provides a disc reproducing means for reproducing a disc to obtain a reproduced signal by a predetermined signal processing, and a write control and a read control for the reproduced signal, The writing / reading speed control means for controlling and outputting the writing / reading speed, and the specific frequency of the reproduction signal is emphasized according to the disc rotation speed by the RIAA characteristic and the emphasized reproduction signal is outputted to the writing / reading speed control means. At the same time, RIAA recording / reproducing equalizer means for outputting the speed-controlled reproduction signal from the writing / reading speed control means by emphasizing the RIAA characteristic and outputting the read signal, and the reading speed of the writing / reading speed control means and the rotation of the disk reproduction. And a playback direction / speed setting means capable of arbitrarily setting the direction. It is characterized in that to generate any variable and sound effects manually playback speed and direction in regeneration.

[0008]

When the writing / reading speed control means controls the writing / reading of the reproduced signal output from the disk reproducing means, the reading direction / speed setting means arbitrarily sets the reading speed and the rotation direction of the disk reproduction.
As a result, the reproduction speed and direction at the time of disc reproduction can be arbitrarily changed manually, so that the sound effect can be generated even during the CD performance.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a sound effect generating device for an audio disk according to the present invention. Reference numeral 1 is a disk, and 2 is a motor for rotating the disk 1. A servo system 3 includes a focus servo 4, a tracking servo 5, a slide servo 6, and a spindle servo 7.

Reference numeral 8 is an optical pickup for reading a signal from the disk 1, 9 is an auto laser power control (ALPC) circuit, and 10 is a high frequency amplifier circuit for amplifying the read signal. A signal processing system 11 is a signal detection PLL.
A circuit 12, an EFM demodulation circuit 13, a CIRC error detection / correction circuit 14, and a RAM 15 are included.

Reference numeral 16 is a control system which includes a microcomputer (microcomputer) 17, a key input circuit 18, and a display circuit 19. The control system 16 operates so as to control the writing speed when outputting audio data from the signal processing system 11 to the shift register 22 described later.

Reference numeral 21 is an output signal from the signal processing system 11.
A RIAA that emphasizes and outputs the data of a specific frequency among the data according to the RIAA characteristic.
A recording equalizer, 22 is a shift register for writing / reading control the audio data supplied via the RIAA recording equalizer 21, and for controlling the writing / reading speed to output, and 23 is an audio data output from the shift register 22. RI that emphasizes data with the reverse characteristic of the RIAA characteristic
It is an AA playback equalizer.

Reference numeral 24 is an analog system, each of which is a pair of D / A converters 25L, 25R, deglitchers 26L, 26R,
It is configured to include low-pass filters 27L and 27R. The analog system 24 converts the reproduction signal output from the RIAA reproduction equalizer 23 into a digital signal and then performs predetermined signal processing to output the L channel and R channel audio signals from terminals 28L and 28R, respectively.

Reference numeral 30 denotes a write / read speed control system for controlling the read speed of the audio data supplied to the shift register 22 and controlling the write speed via the control system 16. The write / read speed control system 30 includes an address control circuit 31, a clock VCO 32, an LPF (low-pass filter) 33, a phase comparison circuit 34, a crystal oscillator 35, an F (frequency) / voltage conversion circuit 36, and an FG ( Frequency generator) 37, track ball 38, touch sensor 39, store opening direction detection circuit 40, mode
The switching switch 41 is included. By controlling the read speed of the shift register 22, the read speed of the audio data can be changed, so that the reproduction speed can be changed. This reproduction speed control is performed by changing the cycle of the read clock of the shift register 22. The shift register 22 is composed of, for example, a RAM.

As shown in FIG. 2, the track ball 38 is provided with a rotary shaft 42 at the center thereof, and both ends of the rotary shaft 42 are supported by supporting bases 43 and 44 via bearings, respectively. A touch sensor 39 is installed on one of the support bases 43. The touch sensor 39 detects whether or not the track ball 38 is touched by the hand, and the pressure increases when the track ball 38 is touched by the hand. By doing so, a detection signal is output. An FG 37 is provided on the other support base 44 side, and this FG 37 detects the rotational speed of the track ball 38.

The FG 37 is attached to the rotary shaft 42 as shown in FIG. 3 and has two rows of slits S1 and S2 having different pitches.
And a pair of photocouplers each of which is composed of a pair of photodiodes 46A and 46B and phototransistors 47A and 47B, which are arranged on both sides of the disc 45, respectively. Each photo diode 4
6A, 46B and phototransistors 47A, 47B
Is embedded in a resin body 48 as shown in FIG. 3, and the pair of photodiodes 46A and 46B are connected to the output optical path L thereof.
1 and L2 are provided at positions where they can pass through the slits S1 and S2 of the disc 45.

Depending on the rotational position of the track ball 38, the pair of phototransistors 47A and 47B are connected to the amplifier 49.
A pulse signal FG as shown in FIG.
1 and FG2 are output. The front-rear relationship of the output phase of each signal is determined by the relative positional relationship between the slits S1 and S2 and the phototransistors 47A and 47B carved in the disk 45. FIG. 5 is a schematic diagram of the relationship seen from the left side of FIG. 2, showing the slits S1 of the disk 45 of the phototransistors 47A and 47B (photodiodes 46A and 46B).
It clearly shows the positional relationship with respect to S2. Therefore, when the track ball 38 rotates counterclockwise A, the pulse signal FG1 precedes, and when the track ball 38 rotates clockwise B, the pulse signal FG2 precedes as shown in FIG. ..

To detect the rotational direction of the track ball 38, the rising edge of one signal FG1 is set to H of the other signal FG2.
It is performed depending on whether or not it is located within the (high) level section. If the edge is within the H section of FG2, the track button
The direction of rotation of the lever 38 is clockwise B, and its edge is FG2.
If it is within the L (low) section, it can be determined that the rotation direction is the counterclockwise direction A. The rotation detection circuit 40 determines the rotation direction.

The frequency output of the FG 37 is the F / V conversion circuit 3
6 is input. The F / V conversion circuit 36 outputs a voltage proportional to the FG pulse frequency to the LPF 33 via the mode changeover switch 41 based on the conversion characteristics shown in FIG. Further, its voltage output is applied to the clock VCO 32 via the LPF 33. The clock VCO 32 is driven by this input voltage, oscillates a clock frequency f proportional to the voltage based on the characteristics shown in FIG. 8, and outputs it to the address control circuit 31. As a result, an address signal proportional to the rotation speed of the track ball 38 is obtained.

The address signal is output from the address control circuit 31 to the shift register 22. The read speed of the shift register 22 is controlled by the clock based on this address signal, and the cycle of the read clock is changed according to the rotation speed of the track ball 38.
The supplied audio data is controlled to be read at a variable speed. As a result, the reproduction speed can be manually changed arbitrarily.

The mode changeover switch 41 is kept on the normal side in the normal CD reproducing mode.
It is connected to the phase comparator 34. In this case clock V
Since the CO 32 is phase-locked by the crystal oscillator 35, stable CD reproduction is performed. On the other hand, the track ball 38
Is operated, the touch sensor 39 operates, whereby the mode changeover switch 41 is switched to the disc (D
It is switched to the isco) side and becomes a disco mode.

The address signal from the address control circuit is also output to the control system 16. As a result, the control system 1
The microcomputer 17 of No. 6 controls the writing speed to the shift register 22 via the signal processing system 11 so that the audio data supplied to the shift register 22 maintains continuity and does not have excess or deficiency. If there is an excess or deficiency of audio data, the shift register 22 is temporarily stopped from writing, and is started to be written when a certain amount or more of data is read. ..

Next, the operation based on the above configuration will be described. During CD performance, when the sound effect is not needed, the mode selector switch 41 is kept at the normal side, and the clock VCO 32 is phase-locked by the crystal oscillator 35, so that stable CD reproduction is performed. Be seen. Therefore, the read speed of the shift register 22 is constant.

Next, when the sound effect is required, the track sensor 38 is touched by the hand, and this is detected by the touch sensor 39. Therefore, the mode selector switch 41 is switched to the disco side. The rotation speed of the track ball 38 is output as a voltage signal to the clock VCO 32 via the FG 37, the F / V conversion circuit 36, the mode changeover switch 41, and the LPF 33. Based on this, the clock VCO 32 oscillates a frequency according to the voltage and outputs it to the address control circuit 31, so that the address control circuit 31 shifts the read clock variable according to the rotation speed of the track ball 38. Output to the register 22.

As a result, the shift register 22 becomes RIA.
The audio data supplied from the A recording equalizer 21 is controlled to be read at a variable speed. On the other hand, the rotation direction of the track ball 38 is detected by the rotation direction detection circuit 40, and this detection signal is output to the address control circuit 31.

The reproduced signal containing the audio data output from the signal processing system 11 is the RIAA recording equalizer 2.
The specific frequency is emphasized by 1 to shift register 22
And the track ball 3 output from the address control circuit 31 in the shift register 22.
The audio data is read by a clock whose period varies according to the rotation speed of 8, thereby changing the reproduction speed. The reproduction signal read out at this variable speed is emphasized by the characteristic opposite to that of the RIAA recording equalizer 21 and then converted into an analog signal by the analog system 24 and subjected to predetermined signal processing, and is output from each terminal 28L, 28R. -It is output as a audio signal.

As described above, according to the present embodiment, the rotational speed and the rotational direction are detected by operating the track ball 38 even during the performance of the CD, and the shift register 22 is driven by a clock having a cycle which varies according to the rotational speed. Is read out, the reproduction speed of the CD reproduction sound can be varied. Therefore, a sound effect "shaky" can be generated even during CD reproduction, and the sound quality can be manually changed by operating the track ball 38.

Further, by passing the reproduced signal through the RIAA recording equalizer 21 and the RIAA reproducing equalizer 23 having the opposite characteristic, it is possible to change the sound quality in the same atmosphere as when reproducing the analog record. Therefore, even when performing a CD performance by a disco, it is possible to generate a sound effect which is no different from that of the analog record performance.

The touch sensor 39 for switching the mode changeover switch 41 is shown as an example provided separately from the track ball 38, but it may be assembled integrally with the track ball 38 to output a detection signal. Also, RI
AA recording equalizer 21 and RIAA reproduction equalizer 2
In No. 3, for example, by combining the reproduction characteristic of the low-range rising type with the recording characteristic of the high-range rising type having the opposite characteristic, a reproducing characteristic similar to the reproducing characteristic of the analog record can be obtained.

[0030]

As described above, according to the present invention, the read speed of the shift register is made variable by the operation of the input means such as the track ball. Therefore, the reproduction speed and direction of the disk reproduction even during the CD performance. Can be changed manually to generate a sound effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a track ball and FG used in this embodiment.
It is a perspective view which shows the structure of.

FIG. 3 is a cross-sectional view showing the configuration of an FG used in this example.

FIG. 4 is a waveform diagram of a pulse signal output from the FG used in this embodiment.

FIG. 5 is a schematic diagram of the relationship seen from the left side in FIG. 2 of the present embodiment.

FIG. 6 is a waveform diagram of another type of pulse signal output from the FG used in this embodiment.

FIG. 7 is a characteristic diagram of an F / V conversion circuit used in this embodiment.

FIG. 8 is a characteristic diagram of a clock VCO used in this embodiment.

[Explanation of symbols]

 11 signal processing system 16 control system 21 RIAA recording equalizer 22 shift register 23 RIAA reproduction equalizer 24 analog system 30 write / read speed control system 31 address control circuit 32 clock VCO 36 F / V conversion circuit 37 FG 38 trackball 39 touch Sensor 40 Rotation direction detection circuit 41 Mode selector switch

Claims (1)

[Claims] 1. A disk reproducing means for reproducing a disk to obtain a reproduced signal by a predetermined signal processing, and a writing / reading speed control means for controlling the writing and reading of the reproducing signal and controlling and outputting the writing / reading speed. , A specific frequency of the reproduction signal is emphasized according to the disc rotation speed by the RIAA characteristic, and the emphasized reproduction signal is outputted to the writing / reading speed control means, and the speed-controlled reproduction from the writing / reading speed control means is performed. R for emphasizing the signal with the inverse characteristic of the RIAA characteristic and outputting
IAA recording / reproducing equalizer means, and reproduction direction / speed setting means capable of arbitrarily setting the read speed of the write / read speed control means and the rotation direction of the disk reproduction, and the reproduction speed and direction during the disk reproduction. A sound effect generating device for an audio disk, characterized in that the sound effect is generated by manually changing the sound pressure.