JPH0475591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a computer mixing control method in a recording system or the like.

(Prior art) When performing recording or its uneven distribution work, the audio of each part recorded on a multi-track tape recorder is transmitted through the fader (volume adjuster), equalizer, and various switches of a mixing console (audio adjustment console). etc., to create a series of sounds, but there are a huge number of operating points, and since it is operated by humans in real time, there is a limit to the subtle adjustments that can be made in one go. It is impossible to create something perfect through manipulation. In addition, in stage recording, etc., a series of operations are performed in rehearsal, and this is often simply repeated during the actual performance, resulting in the waste of repeating the same operation twice.

On the other hand, some devices have been proposed in which a computer is applied to the above-mentioned mixing console, and the operation status of various switches is recorded in synchronization with a tape recorder, and this is later reproduced. Always in charge of computer operations
This system uses a system in which the tape recorder is controlled according to instructions from the computer, so for example, when playing a tape from an arbitrary position, input the data for the relevant time coordinate from the computer keyboard. This method requires manual operation and cannot be easily started from a desired position on the recording tape, resulting in very poor workability.

(Object of the Invention) The present invention has been proposed in view of the above points, and it is possible to store the operating state of a mixing console on a computer, reproduce it later, and modify the operation, and in particular, to The purpose of this invention is to provide a computer mixing control method that greatly improves work efficiency by always controlling the operation of the recorded tape recorder.

(Structure of the Invention) FIG. 1 is a block diagram showing an embodiment embodying the present invention. In the figure, A is a unit on the monitor room side where the mixing console is located, and B is an audio amplification unit located in an isolated, air-conditioned and shielded area, separating the audio amplification unit from the operation unit. By doing so, it is possible to treat the heat generated by the audio amplification section and to prevent the mixing of external noise.

In unit A, numeral 1 is a multi-track tape recorder for recording (hereinafter simply referred to as "tape recorder"), and this tape recorder 1 records and reads out a time code for one of the tracks of a recording tape. A time code reader/generator 2 is connected. 3 is a host CPU that mainly stores the operating status of the mixing console and edits data, and the bus line (main bus) MAIN is provided for each channel and channel group of the mixing console, and includes faders and equalizers. A plurality of input modules 5 are connected in parallel to detect the operation status of switches. Next, 4 is a master CPU mainly for detecting the operation of the equalizer and the bus select of the head amplifier (selecting which channel a sound source such as a microphone is connected to).
The function of detecting the operating state of the mixing console is similar to that of the input module 5 described above. The master CPU 4 and input module 5 control each other via an auxiliary bus AUX.

On the other hand, reference numeral 6 denotes an audio rack constituting an audio amplification section, which is composed of a voltage-controlled amplifier, and which receives control signals sent from the input module 5.
It is remotely operated according to CONT. In addition, since the control signal CONT is multiplexed to reduce the number of transmission lines, the master CPU4
The auxiliary bus AUX is also connected to the audio rack 6, so that data can be transmitted at mutual timing.

FIG. 2 shows the details of the master CPU 4 in FIG. 1, centering on the CPU 40 which includes memories such as ROM and RAM, as well as the equalizer and head amplifier bus select switch 41,
An equalizer operation start switch 43, a rotary encoder 45 for setting the level of the equalizer, a display 46, and interfaces 42, 44, and 47 for connecting these to the CPU 40 are provided. In addition, input module 5
An auxiliary bus interface 48 is provided for connection to the audio rack 6, and a host CPU interface 49 is further provided for connection to the host CPU 3.

FIG. 3 shows details of the input module 5 in FIG. 1. This input module 5 detects the operation status of various variable resistors and switches, including faders, which are most frequently used in mixing consoles, codes them, and sends them to the host CPU 3.
It is composed mainly of a CPU 50. Therefore, the output voltage of the variable resistors VR ₀ to VR _o such as faders is output from the multiplexer 53a and the A/D conversion circuit 53.
It is connected to the CPU 50 via the CPU 50, and the operation status is imported in a time-sharing manner. Also,
D/A conversion circuit 54b and multiplexer 54
a is for controlling the motor M ₀ ~ M _o that drives the variable resistor VR ₀ ~ ~ VR _o such as a feeder, and when reproducing the operating state, the movement of the variable resistor is mechanically reproduced. This is intended to be convenient when making corrections to operations. Note that if the motor remains directly connected, the variable resistor cannot be operated manually, so to prevent this, a touch sense circuit 55 is provided to respond when the knob of the variable resistor is touched. The motor is designed to be disconnected.

On the other hand, 52 operates various switches S ₀ to _{S o} .
It is a switch interface for sending data to the CPU 50, and 51 is a display interface that drives displays DIS ₀ to DIS _l that display the on/off status of switches S ₀ to _{S o} when reproducing the operating state. be. Further, the main bus interface 56 and the alternate bus interface 57 are for communicating with the respective buses, and the sending circuit 58 is for sending a control signal CONT to the audio rack 6. Note that the control signal CONT to be sent out is not limited to an electrical signal, and can also be transmitted using, for example, an optical fiber. In this case, the sending circuit 58 may include an electrical-to-optical conversion transducer. Become.

The operation will be explained below with reference to FIGS. 1 to 3. First, during the first recording, the time code sent from the time code reader/generator 2 is recorded on the last track of the tape recorder 1, and at the same time, the audio of each part to be mixed is recorded on the other tracks. Note that the time code mentioned above is recorded in the form of elapsed time from the start time, so that the absolute position can be determined even when an arbitrary position on the recording tape is played back.

Next, when performing mixing, when the tape recorder 1 is started, the time code recorded on the last track is read by the time code reader/generator 2 and given to the host CPU 3.
At the same time, the audio signal AS _IN recorded on each track of the tape recorder 1 is sent to the audio rack 6. On the other hand, the operating status of the mixing console's variable resistor and various switches is controlled by the master CPU.
4 or the input module 5, and is stored in the RAM of the host CPU 3 or a recording medium such as a floppy disk in accordance with the passage of time of the time code. Note that the operating state of the mixing console is given to the audio rack 6 by a control signal CONT, and the mixed audio is monitored at the same time.

Next, when playing back the tape, the host CPU
Data representing the operating status of the mixing console is read from the recording medium 3, and the data representing the operating status of the mixing console is read out from the recording medium
reproduces the mixing state according to these signals. At the same time, input module 5
The CPU 50 controls the drive motors of the variable resistors VR ₀ to VR _o such as faders via the D/A conversion circuit 54b and the multiplexer 54a, and mechanically reproduces the previous mixing operation state. However, if you wish to modify the operation at this time, by touching the knob of the variable resistor, the touch sense circuit 55 is activated, the motor of the touched variable resistor is electrically disconnected, and at the same time The operating state at this time is stored in the host CPU 3, replacing the previous data. In addition, the previous operating status while touching the knob is indicated by a display element such as an LED installed on the level scale of the variable resistor, making it easy to judge whether further correction is necessary. It's becoming like that. On the other hand, the operation status of the switches is displayed on the disk plays DIS ₀ to DIS _l , and when a new operation is performed, the data is updated in the same way. If further correction is necessary, the tape recorder 1 may be operated to rewind the tape to an arbitrary position and the above-described operations may be repeated. That is, in the present invention, since the operation of the tape recorder is always the "main" operation,
It is possible to edit while listening to the recorded audio, rather than the traditional method of estimating the tape position using a keyboard, inputting position (time) data, and driving the tape recorder under computer control. Therefore, an extremely significant effect in terms of workability has been confirmed.

(Effects of the Invention) As described above, in the computer mixing control system of the present invention, a time code is recorded on at least one track of a tape recorder, and in synchronization with this time code, the variable resistor of the mixing console and The operating states of the switches are stored in a recording medium of a computer, and using this stored data, the operating states of the mixing console are reproduced by following the time code during playback of the tape recorder, and the variable resistance of the mixing console is The data on the recording medium is updated based on the operation status when the equipment and switches are operated again, and since the operation of the tape recorder containing the audio to be edited is always the "main" operation, mixing can be done with simple operations. It is possible to perform the work, and it is possible to significantly improve the work efficiency.

It goes without saying that the present invention can be applied not only to audio tape recorders but also to television equipment such as VTRs.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment embodying the present invention, and FIG. 2 is a block diagram showing a master block diagram in FIG.
FIG. 3 is a detailed diagram of the input module in FIG. 1. 1...Tape recorder, 2...Time code reader/generator, 3...Host CPU, 4...Master CPU, 5...Input module, 6...Audio rack, 55...Touch sense circuit, VR ₀
~VR _o ...variable resistor, _M0 ~M _o ...motor.

Claims (1)

[Scope of Claims] 1. Recording a time code on at least one track of a tape recorder, and storing the operating states of a variable resistor and switches of a mixing console in a recording medium of a computer in synchronization with the time code; With this stored data, the operating state of the mixing console is reproduced by following the time code during playback of the tape recorder, and the operating state when the variable resistor and switches of the mixing console are operated again. A computer mixing control method characterized by updating data on a storage medium. 2. The variable resistor of the mixing console is equipped with a drive motor and has a touch sense circuit, which mechanically reproduces the operating state of the variable resistor during playback on a tape recorder, and when the knob of the variable resistor is touched. When the drive motor is disconnected,
2. A computer mixing control system according to claim 1, wherein the data in the storage medium is updated based on the operating state at that time.