JPS60239982A - Multiple sound recording device - Google Patents

Abstract

PURPOSE:To detect accurately and quickly a desired position of a recording medium by recording preliminarily music timing information on the recording medium, and reproducing this music timing information to search the desired position of the recording medium. CONSTITUTION:A recorder 3 is set to the recording mode, and measure data is read out from a memory 1b of a controller 1 and is modulated by a modulator 4 and is recorded on a tape T. The number of a measure to be searched is inputted from a keyboard 2a. Next, the tape is run in a high speed to reproduce measure data recorded on the tape T, and a pulse signal is generated by a low- pass filter 6 and is inputted to the controller 1. A counter in the controller 1 counts up this pulse signal. When this counted value reaches a value which is smaller than the number of the measured to be searched by a prescribed value, the speed of the tape T is switched to a prescribed speed. Thereafter, the tape T is stopped when the contents of reproduced measure data are equal to the number of a clause to be searched. Thus, the desired position of the tape T is detected accurately and quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiplex recording device that can accurately and quickly search for a desired position on a recording medium such as a magnetic tape.

Tape recorders have been widely used for recording voice, music, and other music data. There are two types of tape recorders, cassette type and reel-to-reel type, depending on the purpose, but either type has a counter that displays the number of rotations of the tape and a display of the running time of the tape as a means of knowing the tape position during recording and playback. A time indicator is provided. However, in the tape position search method using a counter or a time indicator, accurate position detection is difficult due to stretching and slipping of the tape.

Therefore, when it is necessary to search the tape position extremely accurately, such as when overdubbing or searching for the beginning of a tape at a broadcasting station, one channel of the tape is sent with a regular cycle signal (for example, every minute). When the frequency is 200 beats, the frequency is 320)1z), and the tape position is searched by counting this pulse signal. A method such as recording on a channel is adopted. These methods allow for much more accurate position detection than the above-mentioned tape position search using the counter or time indicator. The limit (
(approximately 20 KHz), there is a limit to the high frequency of the pulse signal, and there may be errors in reading the signal such as slack in the tape when the tape starts or stops, making it difficult to detect the tape position. There is a problem that high precision cannot be achieved.

Taking music multiplex recording as an example, first, before recording music, a synchronizing clock signal and a click sound signal are recorded in each channel at both ends, and then this clock signal and click sound signal are recorded on each channel at both ends. Based on this, for example, a rhythm-related sound source (drums, bass, etc.) is recorded on another channel. Next, you record to the other tracks one by one, such as recording from an unsampled sound source (plus, string, etc.) to another channel, but if you want to record from a certain position in the middle, you will need to search for that position. To do this, first find out the time at that position and use a stopwatch, or use a clock signal that has already been recorded on one channel, fast forward the tape near the desired position, and approach that position. The method used is to set the tape at a constant speed and search for the desired position while monitoring with headphones. This operation is extremely troublesome and takes time to search for the desired position. Furthermore, since one bar of music does not always have the same length of time, it is not always possible to accurately detect a position using time data. When music is recorded from different sound sources on multiple channels by repeating such operations, these problems can be improved by using prerecorded time data to search for the tape position.

Also, when recording music produced on a music sequencer or computer in synchronization with music that has already been recorded on tape, it is easy to synchronize from the beginning by using the clock signal recorded on the tape, but It is difficult to accurately synchronize and record from the middle of the process, as in the case of multiple recording described above. Conversely, in the same sense, it has been impossible to control external music production equipment from a tape recorder.

The present invention has been made in view of the above points, and focuses on the fact that music information includes information representing several timings such as measures and beat numbers (hereinafter referred to as "music timing information"). 1. In order to enable accurate position detection, music timing information is recorded on a recording medium such as a magnetic tape.

The present invention will be explained below based on the drawings.

FIG. 1 is a block diagram of an embodiment of a multiplex recording device according to the present invention using a magnetic tape as a recording medium, in which 1 is a controller composed of a CPU 1a and a memory 1b, 2
The 3Fi tape T is a controller knob having a keyboard 2a for setting the time signature of the music (for example, 4/4 time) and a tape position to be searched, and a display 2b for displaying music data such as bar numbers. A multi-channel recorder 4 includes a recording head for loading the tape and recording timing information according to the present invention together with audio, music, data, etc., and a playback head for reproducing the same; 5 is a modulator that demodulates music timing information reproduced by the recorder 3. flJL11i? N
, 6 is a low-pass filter, 7 is an external sound source such as a music sequencer or child instrument, and 8 is an audio output PA''a such as a mixer, effector, or speaker.
This is an output device for music, video, etc. that operates in synchronization with the music recorded by this multiplex recording device.

Now, when multiplex recording music with the multiplex recording device according to the present invention, various music timing information can be considered to be recorded in advance on the tape in order to search the tape position.
Diacritic length? If the time divided into i:48 is used as unit time information, almost all music data can be represented, but the explanation will be given for all sequences of bar information, which is considered to be the easiest and most useful.

"Measure information" is data AI I A2 +...An... that indicates the number of each measure in the music by the starting position of that measure as shown in Figure 2. As illustrated in Fig. 3, the data is a start mark “1”.
It consists of an 8-pit binary data block imitated by "" and end mark "1", and in Figure 3, measure data AI + A2 + representing the 1st measure, 2nd measure, and 3rd measure.
As is exemplified. The time width of the data block can be changed arbitrarily depending on the music to be recorded, but
A space (no signal time) must be provided between two measure data.

It is generated by frequency-dividing the output of an oscillator provided inside the controller 1 at the timing of generating bar data. That is, when a time signature (4/4 or 6/8) is set by operating the keyboard 2a, bar data is output from the controller 1 at a timing corresponding to the time signature set. As mentioned above, the bar data is 8-bit binary coded data, which is subjected to FSK displacement by the modulator 4 and recorded on the first track located at the end of the tape. In this case, the space must be at a lower frequency than the lower frequencies that make up the data block, in order to ensure that the data block can be detected. However, methods other than FSK for modulating bar data can be considered, and in that case, the temporal relationship between data blocks and spaces will be different.

FIG. 4 is a 70-chart when bar data is recorded on tape according to the present invention.

First, rewind the tape to the start position (top)F
-1), the counter in controller l is set to 0 (F-2). Next, the recording mode t43 is set to recording mode and the tape is run at a constant speed (F-3). Read measure data from memory 1b of controller 1 while running at constant speed F-4
), the signal is FSK-modulated by the modulator 4, and recorded on the tape T. This operation continues until an instruction to stop recording the measure data is received (F-5), and during this time the contents of the counter are counted up by one (F-6).

The recording stop command is a recording stop command that is output when a number of bar data equal to the number of bars initially set on the keyboard 2a is recorded according to the number of bars of music to be recorded thereafter.

Next, bar search using bar data will be explained with reference to FIG.

First, enter the measure number N that you want to cue on keyboard 2.
When the music is input manually from a (P-1), it is displayed as music data on the display 2b. Next, run the tape at high speed p 2)
, the measure data recorded on the first track of the tape is reproduced by the playback head L (P-3), a pulse signal corresponding to the width of the data block is generated by the low-pass filter 6,
Human power is applied to controller 1. FIG. 6(A) shows the data block of the first bar, and FIG. 6(B) shows the pulse signal generated from this data block. The pulse signal of the counter in the controller 1 is counted up, and at the same time, bar numbers are sequentially displayed as music data on the display 2b. The count value (Nt) is a predetermined number A (
For example, when the number is reduced by 4) (P-4), the speed of the tape is set to a predetermined speed that can be read as data (P-5). After that, the contents of the measure data played by the playback head are decoded (P-6), and it is determined whether the contents are equal to the measure number to be searched (P-7), and if they are equal, the tape is stopped (P-6). -8). Deciphering the contents of the data block after the tape has run at a predetermined speed is dangerous due to the start conditions of high-speed running or reading errors during high-speed running, and it is dangerous to judge the bar number only from the number of bar data. It is from. The above embodiment exemplifies the case where measure information is recorded as one of the music timing information at the measure position where the tape stops, but the present invention is not limited to this. Of course, it is also possible to record information such as position information, information on a specific position within a measure, or information on elapsed time that is not directly related to the music. In addition to being generated within the recording apparatus, the timing information to be recorded on the tape may of course be provided from an external video or audio output device. However, the timing information may be recorded in a form other than a digital signal. Furthermore, it goes without saying that the present invention can also be applied to multiplex recording using disks and other recording media other than tapes.

As explained above, in the present invention, music timing information such as measure information is recorded in advance on a recording medium, and a desired position on the recording medium is searched by reproducing this music timing information. The desired position of the medium can be detected accurately and quickly, making it extremely convenient for multiplex recording. Music timing information recorded on a flexible recording medium is transferred to an externally connected music sequencer, electronic musical instrument,
By sending it to an automatic music player such as a mixer or effector, or an external device such as Eirin equipment or computer graphics, it is possible to synchronize with the music recorded on the recording medium to play other music or output images. It becomes possible to enrich musicality and expand it into the realm of comprehensive art.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of a multiplex recording device according to the present invention, FIG. 2 is a diagram showing the timing relationship between measure data and musical instruments used in the present invention, FIG. 3 is an example of measure data, and FIG.
FIG. 5 is a flowchart of music timing information recording by the multiple recording device of the present invention, FIG. 5 is a flowchart of measure search operation by the same device, and FIG. 6 is a timing chart showing an example of reproduced measure data and its processed output. . 1...controller, 2...control? Senel, 3...Recorder, 4...Modulator, 5...Demodulator,
6...Low pass filter, 7...External sound source, 8...
・Audio output device patent applicant Shitek Co., Ltd. Agent Patent attorney Hiroo Suzuki M 5 2) Saw/knot data C Pr-& (P-3) (a) YES -Nt 〉A (P-4) (b) -r-711 row slope Figure 6 00000001

Claims (1)

[Claims] Recording means for recording music timing information on a recording medium;
a setting means for variably setting the recording cycle of the music timing information; a search position specifying means for specifying a desired search position on a recording medium using the music timing information; and a reproduction means for reproducing the music timing information recorded on the recording medium. a travel control means for calculating the travel position of the recording medium based on the reproduced music timing information and controlling the travel of the recording medium so as to stop the recording medium at a designated search position; 1. A multi-recording device comprising display means for displaying music data. (2) The multi-recording device according to claim 1, wherein the music timing information is bar display information.