JPH0689501A - Acoustic signal processor - Google Patents

Abstract

PURPOSE:To perform the process such as pitch shift and reverse, etc., according to an operator's will in the same interval as an operation in a DJ technique. CONSTITUTION:Operation pieces 4, 5 are constituted of a disk 42 rotated by a motor 41 and a rotary sensor 43 detecting the rotational direction, the rotational speed and the rotational distance of the rotary disk 42. Then sound data stored in a sound buffer 7 is read corresponding to the rotational speed and the rotational direction of the detected disk 42. Then, since the disk 42 is normally rotated at a constant speed in a fixed direction, the sound data is read from the sound buffer 7 at a constant speed. But, when the disk 42 is stopped forcedly or rotated reversely, read of the round from the sound buffer 7 is stopped or read reversely according to that.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus capable of arbitrarily reproducing voice data prerecorded in an internal memory, and more particularly to a DJ (disc jockey) for tricks, scratches, etc. using a record. The present invention relates to an audio signal processing device capable of performing processing such as pitch shift and reverse at the operator's will, with the same feeling as when operating a technique.

[0002]

2. Description of the Related Art Recently, there are methods such as tricks and scratches as a method of reproducing and playing a record, which is frequently used in disco scenes and the like. The trick is to put two identical records on two record players, set a record needle at the head position of the same prescribed phrase of the other record while playing the prescribed phrase from one record, and cross it. This is one of the DJ techniques in which the same phrase in a record is repeatedly reproduced by alternately switching the connection of the record player by the fader. Scratch uses one record to play a certain phrase, and when passing the certain phrase, hold the turntable of the record player by hand from above the record,
Instantly rotate backwards and return to the position of the head of the specified phrase,
This is one of the DJ techniques in which the same phrase in a record is repeatedly reproduced by reproducing the same phrase again.

DJ for such tricks, scratches, etc.
In order to perform the technique, a special device called a disco mixer, which is generally configured by combining a record player and a mixer, is used. This disco mixer is a specific part of the target record,
By reversing the rotation, changing the speed, and switching the output switch and fader, it produces and plays a variety of sounds, and compared to samplers etc., it responds immediately to pitch soft, reverse etc. It has the feature of being able to

[0004]

However, when the conventional disco mixer is used, the record is abused in an abnormal manner, so that the surface of the record is significantly deteriorated, and the stylus pressure of the pickup causes the stylus to fly during the clutch operation. Since it is made heavier than normal reproduction so as not to occur, there is a problem in that the sound quality during record reproduction is poor and the life of the source record is short.

Furthermore, DJs for tricks, scratches, etc.
In the technique, the part to be played is a specific part of the record (the same phrase in the record is repeatedly played).
Therefore, it takes a lot of time to find the position of the head of the particular phrase during a trick or scratch, and during that time, there is a problem that a record cannot be played and a blank (silence) state occurs.

Further, a reproducing apparatus has been proposed in which the reproducing speed of various external sounds can be varied and reverse reproduction can be freely performed, so that a sound effect suitable for an operator's intention can be freely generated (for example, a reproducing apparatus). , Japanese Patent Application No. 62-227050),
Since the volume is controlled by using the variable voltage of the vendor, the operation is completely different from the operation of the conventional disco mixer, and the operator who can use the conventional disco mixer is confused. As described above, there is a problem that DJ techniques such as tricks and scratches cannot be performed.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to use a record to perform tricks, scratches, and the like.
It is an object of the present invention to provide an audio signal processing device capable of performing processing such as pitch shift and reverse according to the intention of the operator with the same feeling as the operation of the J technique.

[0008]

In order to achieve the above object, an audio signal processing device according to the present invention comprises a storage means for storing digital audio data, and a reading for sequentially reading out the digital audio data stored in the storage means. A voice processing device comprising: means, a sounding means for producing a sound based on the digital voice data read by the reading means, and an operating means for changing the reading speed and the reading direction of the reading means from the outside. Is a motor that rotates in a fixed direction at a predetermined speed, a disc that is rotated by this motor and whose rotational speed and direction can be varied by an external force, a rotational direction of the disc, and at least the rotational speed and the rotational distance. At least one of a sensor for detecting one, a rotation direction detected by the sensor, a rotation speed and a rotation distance. Based on the square of the data, which is constituted by a read control means for controlling the reading means.

[0009]

The audio signal processing device according to the present invention detects an operation such as a forward / reverse rotation direction, a down / up / stop rotation speed and the like, and a rotation distance of a disk that rotates at a constant speed, and detects this. Various types of data are used as reproduction control information, and the lead-out frequency of the audio data and the settings of the D / A processing section are changed according to the information to perform various signal processing. With the same feeling as the operation of DJ technique such as scratching, pitch shift, reverse and the like can be performed at the operator's will.

[0010]

EXAMPLES Examples of the present invention will be described below. FIG. 1 shows an embodiment of an audio signal processing device according to the present invention.

In the figure, reference numeral 1 is a CPU, which includes a control memory 2, a read-out clock source 3, and a bus line.
Operators 4, 5, switch 6, voice buffer 7, each CH
(Channel) D / A processing units 8 and 9 are connected. A mixer amplifier 10 is connected to the D / A processing units 8 and 9 of each CH, and a crossfader 11 is connected to the mixer amplifier 10.

The CPU 1 reads the state of the switch 6 and various kinds of information output from the operators 4, 5 according to the program in the control memory 2, and follows the timing determined by the lead-out clock source 3 of each CH. ,
It has a function of reading the audio data stored in the audio buffer 7 in the normal state or the reverse state.

Since the frequency of the lead-out clock source 3 of each CH is variable, the timing of reading the audio data stored in the audio buffer 7 by the CPU 1 is as follows.
When a fast pitch is specified, the interval becomes short.

The operator 4 has one channel (CH1).
For designating the reproduction processing of the disk, a disk (turntable) 42 rotated by the motor 41, and the disk 4
The rotation sensor 43 detects the rotation direction, the rotation speed, and the rotation distance of the two.

The rotation sensor 43 has a rotation direction indicating whether the disk 42 is rotating in the forward direction or the reverse direction, a rotation speed such as 45 rpm or 33 rpm, and a predetermined position. It has a function of detecting each rotation distance, which indicates whether or not it has rotated to a certain degree.

The disk 42 is rotated at a constant speed by driving the motor 41. Therefore, when the motor 41 is being driven to notify, it is rotating at a constant speed. When the operator directly touches the disk 42 with a brake while the disk 42 is rotating at a constant speed due to the driving of the motor 41, the disk 42 can be easily stopped, or can be rotated in the reverse direction or the speed / slow speed. You can do it. In addition, when the operator directly touches the disk 42 while the motor 41 is rotating at a constant speed to apply control or the like and then the operator releases the disk 42, the original rotation is promptly performed. The rotation moment is reduced as much as possible to return to the speed.

As described above, the DJ person in charge operates the disc 42 of the operator 4 in the same manner as a turntable of a conventional disco mixer to perform a DJ technique such as a scratch like a conventional disco mixer. You can

The operator 5 has the same structure as the operator 4, and is used for designating a reproduction process for one channel (CH2). Although not shown, a disc (turn) which is rotated by a motor is used. Table) and a rotation sensor that detects the rotation direction, rotation speed, and rotation distance of the disk. Since each of the motor, the disk, and the rotation sensor is the same as the motor 41, the disk (turntable) 42, and the rotation sensor 43 of the operator 4, the description thereof will be omitted.

The switch 6 is a switch for designating which audio buffer 7 is allocated to each channel,
The voice buffer 7 stores voice data (music pieces recorded in a record, etc.) to be operated, which is sampled in advance in a large capacity buffer. Based on the data output from the rotation sensor 43 of the manipulator 4, the audio data stored in the audio buffer 7 is stored in the CPU.
1 can be read from any address in any direction, that is, in the plus (normal) direction or the minus (reverse) direction with respect to the time axis direction.

The D / A processing units 8 and 9 of each CH are the CPU 1
However, the digital signal read from the audio buffer 7 is converted into an analog signal from an arbitrary address in either a positive (normal) direction or a negative (reverse) direction with respect to an arbitrary direction, that is, a time axis direction, and the signal is converted into an analog signal for a predetermined time S. / H
(Sample hold) to remove excess harmonics L
Mixer amplifier 10 through PF (low pass filter)
It has a function to output to. This mixer amplifier 10
Is for mixing analog sound signals output from the D / A processing units 8 and 9 and outputting the mixed signals to a preamplifier or the like.

The crossfader 11 controls either the audio signal input from the D / A processing unit 8 or the output of the audio signal input from the D / A processing unit 9 to output it from the mixer amplifier 10. By operating the crossfader 11, it is possible to output an audio signal of either the D / A processing unit 8 or the D / A processing unit 9 from the mixer amplifier 10.

The arrows input from the bus line to the D / A processing units 8 and 9 in FIG. 1 are set by the frequency of the read-out clock source 3 and the setting of the D / A processing units 8 and 9 and the S / H.
It shows that the (sample hold) time and the LPF (low pass filter) characteristic are variable.

Next, the operation of this embodiment will be described with reference to the flow chart shown in FIG.

First, at the start, in step 100, the state of the lead-out clock source 3 of CH1 is checked, and whether or not the state of the lead-out clock source 3 is a read request, that is, for example, the clock goes to the Hi level. In step 110, it is determined whether or not it is up. If it is determined that it is not a read request, that is, CH
Step 2 to see the status of the lead-out clock source 3 of step 2
Move to 20.

When it is determined in step 110 that the state of the read-out clock source 3 is a read request, the access address of CH1 set in the previous cycle is fetched in step 120, and step 1
At 30, the audio data set by the switch 6 is read from the audio buffer 7 according to this access address.

Next, in step 140, the voice data read from the voice buffer 7 in step 130 is input to the D / A processing section 8. And step 1
At 50, data such as a rotation direction and a rotation speed output from the rotation sensor 43 of the operator 4 is fetched, and at step 160, it is determined whether or not the disc 42 of the operator 4 is rotating. If it is determined that it has not been performed, the process proceeds to step 220 and CH2 processing is performed. If it is determined in step 160 that the motor is rotating,
In step 170, it is determined whether or not the forward rotation is performed. If it is determined in step 170 that the forward rotation is performed, the access address of CH1 is incremented in step 180, and if it is determined that the forward rotation is not performed in step 170, the CH is determined in step 190.
Decrement the access address of 1.

Next, when the processing to the access address of CH1 is completed, in step 200, the disc 4 of the operator 4 is processed.
The frequency of the readout clock source 3 according to the rotation speed of 2 is set. In a steady rotation state in which the disc 42 of the operator 4 is not operated, the frequency of the readout clock source 3 is
It is the same as the sampling frequency (Fs) of the audio data stored in the audio buffer 7. Also, step 21
At 0, the LPF characteristic or the like of the D / A processing unit 8 is set according to the frequency of the read-out clock source 3. This is to change the S / H (sample hold) time and the characteristics of the low-pass filter in order to cut aliasing noise as the sampling frequency Fs changes sequentially.

Next, in step 220, the state of the lead-out clock source 3 of CH2 is checked, and it is determined in step 230 whether the state of the lead-out clock source 3 of CH2 is a read request. If it is determined that it is not a read request, the process immediately moves to step 100. If it is determined in step 230 that the state of the read-out clock source 3 is a read request, the same processing as step 120 to step 210 is performed in step 240. However, when the turntable of the manipulator 5 is not rotating, step 220 is changed to step 100.

Therefore, according to the present embodiment, DJ techniques such as tricks and scratches can be performed with the same feeling as operating a turntable on which a record is placed.

[0030]

Industrial Applicability The present invention detects the forward and reverse rotation directions of an operator with respect to a disk resembling a turntable that rotates at a constant speed, and at least one of the rotation speed and rotation distance such as down / up / stop. Records are used because various detected data are used as reproduction control information, and the lead-out frequency of audio data and D / A processing unit settings are changed according to the information to perform various signal processing. With the same operability as DJ techniques such as tricks and scratches, it is possible to perform pitch shift, reverse, etc. processing at the operator's will, and the output sound quality is high without any deterioration. Playback with sound quality can be performed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 1 CPU 2 Control Memory 3 Lead-out Clock Source 4 Operator 5 Operator 6 Switch 7 Audio Buffer 8 D / A Processor 9 D / A Processor 10 Mixer Amplifier 11 Crossfader

[Procedure amendment]

[Submission date] June 29, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Acoustic signal processing device

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus capable of arbitrarily reproducing acoustic data prerecorded in an internal memory, and more particularly to a DJ (disc jockey) such as a trick or scratch using a record. ) the operation and the same sense of techniques, while the pitch shift of the will of the operator, to acoustic signal processing apparatus capable of performing processing reverse like.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to use a record to perform tricks, scratches, and the like.
In operation the same sense of J technique, while the pitch shift of the will of the operator, is intended to provide acoustic signal processing apparatus capable of performing a process reverse like.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

In order to achieve the above object, an acoustic signal processing device according to the present invention emits an acoustic signal.
Storage means for storing sound data for live, reading means for sequentially reading sound data stored in the storage means, a sounding instruction means for instructing a sound based on the sound data read by said reading means , A rotation driving means that rotates in a certain direction at a predetermined speed, and this rotation driving hand.
The rotation the rotational speed and direction by an external force is sensed and variably rotating member, a sensor means for detecting the rotational direction and rotational speed of at least said rotary member, by the sensor means <br/> while rotated by the step The reading means is based on data of at least one of the rotation direction and the rotation speed of the body.
And a read control means for controlling the read state of.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

The acoustic signal processing device according to the present invention detects the forward and reverse rotation directions, down / up / stop operations, and the rotation speed of the rotating body rotating at a constant speed,
This and detected various data of the reproduction control information, and the read-out frequency of the acoustic data by the information, D / A
Since the setting of the processing unit is changed and various signal processing is performed, the pitch shift can be performed at the operator's will with the same feeling as using DJ techniques such as tricks and scratches using records. Processing such as reverse can be performed.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

[0030]

The present invention reduces the forward and reverse rotation directions of an operator with respect to a rotating body resembling a turntable that rotates at a constant speed, and the operations such as down, up, and stop , and the rotation speed.
Detects at least and uses the detected data for playback control.
It is the same as the DJ technique operation such as tricks and scratches by using records, because it is used as information for changing the form, and the speed, the reading direction, or the stop of the reading of the acoustic data is performed according to the information. With the operability of, pitch shift according to the will of the operator
It is possible to perform processing such as reverse, and it is possible to perform reproduction with high sound quality without any deterioration in the sound quality of the output sound.

Claims (1)

[Claims] 1. Storage means for storing digital audio data, reading means for sequentially reading the digital audio data stored in the storage means, and sounding means for producing sound based on the digital audio data read by the reading means. And a manipulating means for changing the reading speed and the reading direction of the reading means from the outside, wherein the operating means is a motor for rotating the operating means in a constant direction at a predetermined speed, and the motor is rotated by the motor. A disk whose rotational speed and direction can be changed by an external force, a sensor that detects the rotational direction of the disk, and at least one of the rotational speed and the rotational distance, the rotational direction detected by the sensor, and the rotational speed And read control means for controlling the read means based on at least one of the rotation distance data, An audio signal processing device comprising: