JPS62298902A - Dubbing device for sound signal - Google Patents

Abstract

PURPOSE:To facilitate dubbing tapes at a high speed while holding characteristics by setting dubbing at a second speed after arbitrarily setting an equalizer characteristic at a first speed and switching the equalizer characteristic to the higher band side in accordance with the speed ratio. CONSTITUTION:A reproducing device is driven at the first speed to obtain a reproduced output from a first tape 2 and is monitored on a monitor device connected to a reproduced output terminal 27, and an ideal or desired optional equalizer characteristic is set by the operation of operating parts 32-36 of a graphic equalizer 24, and positions of operating parts 32-36 are held at least till the end of dubbing. Next, a dubbing setting operation part 30 is operated, and then, contacts (b) of speed selecting switches 10 and 20 are turned on, and a reproducing device 1 and a recording device 9 are set to the second speed together, and a recording input switch 28 is turned on, and switches 37-46 of the equalizer 24 are turned off. As the result, the reproduced signal has the equalizer characteristic, where each frequency component is shifted double by the graphic equalizer 24, and is recorded on a second tape.

Description

[Detailed description of the invention]

3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an audio signal dubbing device such as a double deck. [Prior Art and its Problems] Tape decks equipped with graphic equalizers that independently adjust the levels of multiple frequency components in a reproduced signal are known. If a graphic equalizer is provided, it is possible to arbitrarily adjust the Vcf of frequency components in multiple stages, thereby enabling ideal or preferred reproduction or recording. Conventionally, when dubbing a reproduced signal adjusted L7 with a graphic equalizer, high-speed dubbing was not performed but dubbing was performed at normal speed in order to maintain the VI4-adjusted frequency characteristic. Therefore, there is a problem that dubbing cannot be performed quickly. Therefore, the purpose of the present invention is to set the speed at normal speed.

[-] An object of the present invention is to provide a dubbing device for audio signals that can perform high-speed dubbing while maintaining desired frequency characteristics. [Means to solve the problem]

Solving the above problems [7. To achieve the above object, the present invention provides a method for converting audio signals recorded on a first recording medium into
An apparatus for dubbing onto a recording medium, the device being capable of producing a relative scanning motion between the recording medium and the reproducing head at a speed of a reproducing device configured to also produce a relative scanning motion at a high second speed; and a reproduction device configured to produce a relative scanning motion at the second speed between the second recording medium and the recording head. a recording device configured to generate and record the audio signal; and in conjunction with setting the playback device to the second speed, the recording device is also set to the second speed. a playback output terminal capable of obtaining an audio signal obtained from the playback device when the playback device is set to the first speed; a recording input switch that supplies the audio signal obtained from the playback device to the recording device in conjunction with the setting of the speed; and a recording input switch that arbitrarily changes equalizer characteristics when the playback device is set to the first speed. Shifting the equalizer characteristic to the high frequency side at a ratio corresponding to the ratio of the first speed and the second speed in conjunction with the setting of the adjustment means and the reproduction device to the second speed. The present invention relates to an audio signal dubbing device comprising the playback device and an equalizer connected to l'Ei1 of the playback output terminal and the recording switch. [Function] When dubbing with the apparatus of the invention, first, reproduction is performed at a first speed, and while monitoring this, a desired equalizer characteristic (frequency characteristic) is set with an equalizer. Next, the playback device and recording device are set to the second speed. From this nK, the equalizer characteristic is shifted to the high frequency side in accordance with the speed ratio, and a pure reproduction output is supplied to the recording device. As a result, when the dubbed recording medium is reproduced at the first speed, it is possible to reproduce an audio signal frequency-compensated with the desired equalizer characteristics. [Embodiment] Next, a dubbing device, ie, a double deck, according to an embodiment of the present invention shown in FIGS. 1 and 2 will be described. In FIG. 1, a playback device runs a first magnetic tape (2) as a recording medium and connects a playback head (3) and tape (2).
), a pair of reel motors f41 f51, capstan (6),
It has a capstan motor (71), a pinch roller (8), a speed control circuit (9), and a switch port α for selectively setting a first speed (normal speed) and a second speed (high speed). Similarly to the reproducing device (1), the recording device α1) also runs the second magnetic tape Q2+ to connect the recording head αJ and the tape (12).
A pair of 17) I+ motors α41 (15, a capstan motor, a capstan motor aη, a pinch roller α&, a speed control circuit 09, a first speed and a first speed It has a switch for selectively setting the speed of 2.
One contact a of 1 (2υ) is connected to the first speed signal source Qυ, and the other contact is connected to the second speed signal source ω. The output stage VC of the reproducing head (3) is a head amplifier e31.
, a graphic equalizer (two-core,
A reproduction output amplifier is provided in 1) the sixth order. The output of the reproduction output amplifier T25) is connected to the reproduction output terminal α via the monitor switch mark, and is connected to the recording head C via the input cartridge and the recording amplifier C91.
It is connected to l31. @) is the second speed setting, ie, dubbing setting operation section. C31) is a dubbing control circuit that holds the dubbing operation until it is automatically or manually reset and controls each switch 0α (201ω) so that the dubbing state is obtained.Speed selection switch GOII201 is configured so that the contact DA is kept on in the non-dubbing setting state (normal time), and when the dubbing setting operation section (2) is operated, the contact DA is turned on and the contact a is turned OFF. The recording input switch (281 is configured to be turned off in a non-dubbing state and turned on in a dubbing state. Graphic equalizer C241 related to the present invention)
, there is an adjustment operation section C3Z for adjusting these signal novels corresponding to frequencies f1, f2, fs, f4, fs.
(To) (To) c! S8■ and a frequency mantissa f transfer switch 07 for shifting the frequency characteristics at a predetermined ratio during dubbing.
) (to) 09C41 (41) (4Z (43) (4
4) (451 (461 included n-czb. Two frequency f transfer switches 07 provided for each frequency)
~ +461 responds to the dubbing settings with graphic
Equalizer C! It is related to the dubbing control circuit Gυ so as to shift each of the frequencies f1 to f5 in (a) to the higher frequency side by a value corresponding to the speed ratio. In addition, the switch (IO1■
12 & and Gη~(c) are configured to be interlocked. FIG. 2 is a circuit diagram T which clearly shows the graphic equalizer U shown in FIG. This graphic equalizer 241 includes an operational amplifier (47), and the output terminal of a head amplifier (c) is connected to this non-inverting input terminal via a coupling capacitor (48) and a resistor (49). A variable resistor Sol is connected between the inverting input terminal and the non-inverting input terminal of the target as an equalizer characteristic adjustment means.
The slider (32a) to (36
An impedance circuit corresponding to each frequency is connected between a) and ground. Since the circuit configurations for each frequency f, to f5 are the same, only the circuit for frequency f will be explained. A transistor ω is connected between 0 and ground through a resistor &, and a bias setting circuit between the resistors is provided in series with this, and these resistors 1!57) are connected to the transistor 5&. A resistor R1 is connected between the base of 551 and the base of 551. In addition, between the base of the transistor mark and the slider (32a), capacitors C1, C2, second, third, and fourth capacitors C1, C2,
C3 and C4 are connected in series, and a resistor R2 is connected between the connection between the second capacitor C2 and the third capacitor C3 and the emitter of the transistor 69. The switch C3η is connected in parallel to the second capacitor (,), and the switch Gη is connected in parallel to the third capacitor C3. Operation unit GO1 operates operation i?c
The off control is performed only during the period when the dubbing state is set. Transistor 6, resistor R, R2 and capacitor (
:]~Ci acts as an impedance circuit including an inductance component, and when the switch c3 is on, the resonant frequency follows the following equation. During dubbing at the second speed, the switch (37) (to) is turned off, so the second and third capacitors C2 and C3
] and the fourth capacitor C, , C, are connected in series, and the combined capacitance of each is ]/2. That is, this example TViC, = C2 = C3 = C4 = CK setting r
Therefore, which composite capacitance of C1 and C2 and C3 and C4
The combined capacitance of is shown in the figure. Therefore, the resonant frequency doubles. As a result, the equalizer characteristic (frequency characteristic) is shifted to the higher frequency side in accordance with the ratio between the normal speed (Jth speed) and the dubbing speed (second speed). When dubbing with the device of this embodiment, first drive the playback device at the first speed to obtain playback output from the second tape (2), and connect it to the playback output terminal (2I). Monitor with a monitor device, and set the ideal equalizer characteristics or desired equalizer characteristics by operating the graphic equalizer 〇) 4) operating section (32~(branch)), and set the desired equalizer characteristics at least Maintain it until the end of dubbing.Next, operate the dubbing setting operation section Got.By rubbing, the speed selection switch α0 ((support)) will be fully engaged, and both become double speed (second speed), and the recording input switch 2 is turned on, and the equalizer (241 +371-(c) switches are turned off. As a result, the playback signal is changed to the graphic equalizer c! 4 by the foot frequency component, % f
, is recorded on the second tape α2 with an equalizer characteristic shifted twice. When dubbing, use the second key 1.
Since the speed of α2 is doubled, equalizer c!
By shifting the frequency characteristics of 4) to a higher frequency range in accordance with the speed ratio, a record equivalent to dubbing at the first speed is formed. This carefully dubbed second tape α
2 to the playback device (1) and played back at the first speed,
Substantially the same playback output as the monitor output can be obtained. The invention is not limited to the embodiments described above, but can be modified. For example, switch O1]■ (to) Gη
~The throat may be configured with an electronic switch. In this case, independent switches are provided corresponding to the contacts a and b. Also, in this embodiment, the first speed value is configured to be set automatically by normal playback and recording settings. Although it is
A second speed setting means may be provided independently to control the switches aα■@c3η to Q61. In addition, a playback device (IIK recording circuit may be added and a playback circuit may be added to the recording device (91). Equalizer 34
is not limited to that shown in Figure 2, and can be expressed in various ways. In addition, the present invention is also applicable to a case where the ratio between the first speed and the second speed is not doubled but is multiplied by an arbitrary number N. [Effects of the Invention] As is clear from the above, if you arbitrarily set the equalizer characteristic at the first speed and then set dubbing at the second speed after eating, the equalizer characteristic will be inhibited on the high frequency side in accordance with the speed ratio. Therefore, dubbing is performed while maintaining the arbitrarily set equalizer characteristics at the first speed. That is, high-speed dubbing while maintaining arbitrary equalizer characteristics can be easily achieved.

[Brief explanation of the drawing]

Figure 41 shows an embodiment of the present invention. FIG. 2 is a circuit diagram illustrating the graphic equalizer of FIG. 1. (1)...playback device, (2)...th tape, (
3)...Playback head, aα...speed song selection switch,
a... Recording device, C21... Second tape, αe...
... Recording head, ■... Speed song selection switch, @...
Graphic equalizer, ■... playback output terminal,
C28+...recording input switch, circle...dubbing operation section, 03~C361...adjustment operation section, c3η~(4
61...Switch for changing frequency characteristics.

Claims (1)

[Claims] (1) Transfer the audio signal recorded on the first recording medium to the second
An apparatus for dubbing onto a recording medium, the apparatus being capable of producing a relative scanning motion at a first speed between the first recording medium and a reproducing head, and further comprising: a reproducing device configured to also produce a relative scanning motion at a high second speed; and a reproduction device configured to produce a relative scanning motion at the second speed between the second recording medium and the recording head. a recording device configured to be able to generate and record the audio signal; and in conjunction with setting the playback device to the second speed, the recording device is also set to the second speed. a speed setting device for controlling the playback device; a playback output terminal capable of obtaining an audio signal obtained from the playback device when the playback device is set to the first speed; a recording input switch that supplies an audio signal obtained from the playback device to the recording device in conjunction with the setting; and an adjustment for arbitrarily changing the equalizer characteristic when the playback device is set at the first speed. and means for shifting the equalizer characteristic to a higher frequency side at a ratio corresponding to a ratio between the first speed and the second speed in conjunction with setting the reproduction device to the second speed. and an equalizer connected between the playback device, the playback output terminal, and the recording input switch.