JP4419849B2 - Digital audio signal recording / reproducing apparatus - Google Patents

Description

  The present invention relates to a digital audio signal recording / reproducing apparatus having a digital audio signal recording / reproducing function and a signal processing function such as a digital mixer.

  Arranging a digital mixer instead of an analog mixer between the input means and the output means is known from, for example, Japanese Patent Application Laid-Open No. 11-215078 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2003-168962 (Patent Document 2). It is.

  The digital mixer converts multiple audio input signals into digital signals, and performs processing such as adding multiple digital audio signals in a DSP (digital signal processor), and converts the processed digital signals into analog signals. And output. Since this signal processing is performed by DSP software, it is possible to easily execute mixing processing by a complicated signal path, which is difficult to realize with a conventional analog mixer.

  By the way, if the digital mixer and the digital track recorder as the digital recording / reproducing apparatus are integrated, the audio system can be reduced in size and cost. Therefore, the present applicant has created a mixer-integrated digital track recorder schematically shown in FIG. This mixer-integrated multitrack recorder includes a plurality of channels 101 and 102, a stereo bus 103 to which these are connected, a stereo output circuit 104, a cue (CUE) bus 105, a monitor bus 106, and a monitor output circuit. 107 and first and second monitoring switches 108 and 109.

  Each channel 101, 102 is a digital audio signal input terminal 110, a first switch 111, an equalizer means 112, an effector means 113, a level adjusting means 114, commonly called a fader, and generally called a pan. Distribution means 115, a second switch 116, and a memory means 117 such as an HDD which can be equivalently called a track.

  In the recording mode, the digital audio signal is input to the input terminal 110 with the contact a of the first switch 111 turned on and the second switch 116 turned on. Thus, desired processing is performed on the input signal by the equalizer unit 112, the effector unit 113, and the level adjusting unit 114, and the processed signal is recorded in the memory unit 117. When reproducing the recording signal of the memory means 117, the contact b of the first switch 111 is turned on and the second switch 116 is turned off. As a result, the reproduction signal of the memory means 117 is sent to the stereo output circuit 104 via the first switch 111, the equalizer means 112, the effector means 113, the level adjusting means 114, the distribution means 115, and the stereo bus 103. The input signal of the output circuit 104 is converted into an analog signal by a digital-analog converter incorporated therein, and this analog signal is sent to a speaker (not shown). Further, the digital signal on the input side of the stereo output circuit 104 or the analog signal on the output side of the stereo output circuit 104 can be sent to another recording device and recorded on another recording medium.

  By the way, in the conventional mixer-integrated multi-track recorder of FIG. 1, it is necessary to change the setting of the equalizer means 112 and switch the switches 108, 109, 111, 115, etc. every time switching between recording and reproduction. Accordingly, the conventional mixer-integrated multi-track recorder has the disadvantages of being unusable and giving a complicated and difficult-to-understand impression to the user, and the necessity of increasing the number of switches and the cost. Inconvenient problems occur especially during "track down" and "punch in / out". This will be described in detail below.

  In the reproduction generally called “track down”, the recorded signal of the memory means 117, that is, the track is reproduced, subjected to a desired mixing process, and sent to the stereo output circuit 104. When the playback mode is before the recording mode, the equalizer means 112, the effector means 113, and the level adjustment means 114 are set in a state suitable for recording, so when switching from the recording mode to the playback mode, The equalizer means 112, effector means 113, level adjusting means 114, etc. must be set and changed to a state suitable for the playback mode. If the setting is not changed in the reproduction mode, the output signal of the memory means 117 is subjected to frequency correction similar to that at the time of recording by the equalizer means 112, for example, and good reproduction is impossible. Therefore, a considerably complicated work is required at the time of switching from the recording mode to the track down state, and the burden on the user is large. In addition, when switching from the track down state to the recording mode, forgetting to change the setting of the equalizer means 112 etc., optimum recording cannot be performed.

When rewriting a part of the recorded data of the memory means generally called “punch-in / out”, the memory means 117 is reproduced and the replayed sound is played through a speaker or headphones, for example, performing performance or singing. When the rewrite location is reached, the second switch 116 is turned on by operating the foot switch, for example, and a new digital audio signal is written in the memory means 117. At the end of the rewriting portion, the second switch 116 is turned off again by the foot switch to return the memory means 117 from the recording mode to the reproduction mode. Punch-in / out is a well-known recording technique that corrects only erroneous parts in performance and singing in this way. By the way, for example, when recording a performance or singing for correction only to the memory means 117 of the channel 101, the memory means 117 of the other channel 102 is played back and listening to the reproduced sound, it will be recorded from now on. In addition to being able to listen to performances and singing, the correction work is not smoothly performed unless the playback sound of the memory means 117 of the channel 101 to be corrected is not heard until immediately before recording is started. . The sound to be recorded needs to be output to the memory means 117 of the channel 101 indefinitely while maintaining the contact point a of the switch 111 turned on. That is, the equalizer means 112, the effector means 113, and the level adjusting means 114 of the channel 101 are used for processing the signal to be recorded. Therefore, at the time of punch-in / out, this signal path is used to reproduce the reproduced sound of the memory means 117 of the channel 101. I can't listen. In order to solve this problem, a queue (CUE) bus 105, a monitor bus 106, first and second monitor switches 108 and 109, and a monitor output means 107 are provided in FIG.
At the time of punch-in / out, the first and second monitor switches 108 and 109 are turned on, and a speaker or headphones are connected to the monitor output means 107.
In the playback mode before and after the punch-in / out period, the playback sound of the memory means 117 of the channel 101 and the playback sound of the memory means 117 of the channel 102 are routed from the cue (CUE) bus 105 via the second monitor switch 109. Even if it is supplied to the monitor bus 106, the input signal of the digital audio signal input terminal 110 of the channel 101 passes through the equalizer means 112, the effector means 113, the level adjusting means 114, and the distribution means 115 of the channel 101, and the stereo bus 103. To the monitor bus 106 via the first monitor switch 108. That is, the recording input signal is monitored through the stereo bus 103 and the reproduction signal cue (CUE) bus 105 of each track.
Punch in / out to the recording mode in the period, recording the input signal while being recorded are supplied via the switch 116 in the memory means 117 of the channel 101, it is monitor through the stereo bus 103. At this time, since the memory means 117 of the channel 101 is in the recording mode, the reproduction signal via the cue (CUE) bus 105 is not supplied, and only the reproduction signal of the memory means 117 of the channel 102 is monitored via the cue (CUE) bus 105. Is done.
As described above, the signal path of punch-in / out is complicated, and it is difficult for beginners of audio technology to understand punch-in / out.
In FIG. 1, the contact b of the first switch 111 is turned on before or after punch-in / out, and the reproduction output of the memory means 117 is monitored through the stereo output circuit 104, and the first switch 111 is recorded during punch-in / out recording. However, it is not preferable because the recording level and sound quality of the recording input signal cannot be adjusted. Therefore, in order to solve these problems, a queue bus 105, a monitor bus 106, first and second monitor switches 108 and 109, and a monitor output circuit 107 are provided.

As described above, the digital audio signal recording / reproducing apparatus according to the prior art has a complicated signal path, so that it is difficult for the user to understand and the convenience for the user is not always good. Furthermore, since the signal path is complicated, the amount of calculation required for DSP signal processing increases to realize this, which is a cause of high cost.
An object of the present invention is to solve such problems, and to provide a digital audio signal recording / reproducing apparatus that simplifies a signal path and is easy to understand and use for a user.
Another object of the present invention is to provide a digital audio signal recording / reproducing apparatus that effectively reduces the amount of calculation of the calculation means and suppresses an increase in cost.

In order to solve the above problems , in the present invention, a digital audio signal recording / reproducing apparatus includes an input means for inputting an audio signal and outputting the digital audio signal, and an output means for inputting the digital audio signal and outputting an audio signal. And channel means connected between the input means and the output means , wherein the channel means records the digital audio signal output from the input means and the digital audio signal recorded therein Memory means capable of alternatively executing reproduction, and first addition means for adding the digital audio signal output from the input means and the digital audio signal reproduced from the memory means; the digital audio signal outputted from said first addition means Subjected to Nozomu processing, signal processing means for sending a digital audio signal after the processing to the output means is connected between said output means and said signal processing means, the digital audio output from the input means A second addition means for adding the signal and the digital audio signal output from the signal processing means, and sending the digital audio signal after the addition processing to the output means; the first addition means; And a signal selection / transfer means for selectively sending the digital audio signal output from the input means to the adding means, and when the digital audio signal is recorded in the memory means, the signal is output from the input means. A digital audio signal is input to the memory means without going through the signal processing means, and the digital audio signal is decoded from the memory means. When playing Tal audio signal constitutes a digital audio signal to output through the signal processing means.

In the digital audio signal recording / reproducing apparatus , the input means includes a plurality of input means for inputting a plurality of audio signals as digital audio signals, and the channel means includes the plurality of input means and the output means. It is desirable to be composed of a plurality of channel means arranged between the two.
The digital audio signal recording / reproducing apparatus further includes a signal for selectively allocating output signals of the plurality of input means to the plurality of channel means between the plurality of input means and the plurality of channel means. It is desirable to have an allocation means.
The output means of the digital audio signal recording / reproducing apparatus is preferably a main bus capable of receiving and outputting the output signals of the plurality of channel means.
The digital audio signal recording / reproducing apparatus preferably further includes a digital / analog converter connected to the main bus.
The digital audio signal recording / reproducing apparatus further includes a sub-bus for assisting signal processing, a plurality of auxiliary circuit means provided corresponding to the plurality of input means, and an effector means. Each of the plurality of auxiliary circuit means has means for selectively supplying an output signal of each input means to the main bus, the sub bus, and the plurality of channel means, The sub-bus signal is subjected to desired processing and the processed signal is sent to the plurality of channel means. Each of the plurality of channel means further includes output signals of the plurality of input means. Signal assigning means for selecting one of the output signals of the effector means as an input signal of its own channel means, and the output of the signal processing means as the main bus and the sub bus It is desirable to have a selectively supplying means.
The signal processing means of the digital audio signal recording / reproducing apparatus is preferably at least one of equalizer means and effector means.
The memory means of the digital audio signal recording / reproducing apparatus is preferably a magnetic disk recording / reproducing apparatus, an optical disk recording / reproducing apparatus, a magneto-optical disk recording / reproducing apparatus, or a readable / writable semiconductor memory.
The adding means and the signal processing means of the digital audio signal recording / reproducing apparatus are preferably a digital signal processing apparatus or a microcomputer.

The invention of each claim has the following effects.
(1) Since the signal path is simplified, it is possible to provide an easy-to-use digital audio signal recording / reproducing apparatus that is easy for the user to understand and improves user convenience.
(2) Since the recording to the memory means is performed without going through the signal processing means such as an equalizer, the setting error of the signal processing means does not affect the recording to the memory means. Therefore, recording failure can be reduced.
(3) Since the signal processing means is used only at the time of reproduction, it is not necessary to change the setting of the signal processing means by switching between the recording mode and the reproduction mode, the operation is simplified, and the working efficiency is improved.
According to the third to eighth aspects of the invention, it is possible to diversify the recording / reproducing and signal processing of a plurality of channels.
According to the inventions of claims 2 and 4, it is possible to diversify the monitoring of the input signal.

  Next, an embodiment of the present invention will be described with reference to FIGS.

  A mixer-integrated digital audio multi-track recorder (hereinafter simply referred to as a recorder) as a signal recording / reproducing apparatus according to the first embodiment of the present invention is roughly divided into first to sixth input means 1a to 1a, as shown in FIG. 1f, first and second output means 2a, 2b, recording and mixer means 3, operating means 4 arranged on a panel (not shown), and display means 5.

  The first to sixth input means 1a to 1f have input terminals 6a to 6f for inputting analog signals such as audio signals, and further, as shown in FIG. 3, an amplifier 7 and gain control means for trimming. 8. An analog-to-digital converter, that is, an ADC 9 is provided, and the analog signals at the input terminals 6a to 6f are converted into digital signals and supplied to the recording and mixer means 3. In FIG. 2 and FIG. 3, six input means 1a to 1f are shown, but it can be changed to an arbitrary number such as eight.

  The first output means 2a has a pair of output terminals 10a and 10b for converting the digital signal supplied from the recording and mixer means 3 into an analog signal and outputting it. More specifically, as shown in FIG. 3, the first output means 2a has a pair of digital-to-analog converters or DACs 11a, 11b connected to the recording and mixer means 3. The second output means 2b connected to the recording and mixer means 3 has a terminal 12 for outputting the digital signal as it is without converting the output of the recording and mixer means 3 into an analog signal. Although FIG. 2 and FIG. 3 show the first and second output means 2a and 2b, either one can be omitted, or more output means can be provided.

  The digital recording and mixer means 3 schematically shown in FIG. 2 comprises a digital audio bus 13, a host bus 14, a DSP (digital signal processor) 15, a hard disk drive or HDD 16, a first ROM 17, first RAM 18, CPU (central processing unit) 19, second ROM 20, second RAM 21, and switching means 22. The digital audio bus 13 is connected with first to sixth input means 1a to 1f, first and second output means 2a and 2b, DSP 15, HDD 16, first ROM 17, and first RAM 18. In FIG. 2, the digital audio bus 13 is schematically shown by one line, but actually, as shown in FIG. 3, it is a stereo bus 23 having two lines 23L and 23R. The digital audio signals supplied from the first to sixth input terminals 1a to 1f are first and after being subjected to, for example, recording / reproducing processing, mixing processing, or effect processing by audio signal processing means including DSP 15, HDD 16, ROM 17, and RAM 18. It is sent to the second output means 2a, 2b.

  The CPU 19, ROM 20 and RAM 21 connected to the host bus 14 constitute a microcomputer, which is a control means for digital audio signal processing means comprising a DSP 15, memory means 16 and the like. Perform the desired processing of the signal. For this reason, the operation means 4 and the display means 5 are connected to the host bus 14. In FIG. 2, the operating means 4 is schematically shown in one block, but actually, a plurality of switches 4a schematically shown in FIG. 3, a plurality of adjusting means not shown, etc. Including. Further, in FIG. 2, the display means 5 is schematically shown as one block, but includes a number of indicators composed of LEDs (light emitting diodes). In this embodiment, the switching means 22 is provided in order to use the HDD 16 as the memory means in both the DSP 15 and the CPU 19.

  FIG. 3 is a block diagram functionally or equivalently showing the recording and mixer means 3 of FIG. 2 with the input means 1a to 1f and the output means 2a, 2b. The recording and mixer means 3 comprises a stereo bus 23, a signal assignment means 25, and first to 24th channel means CH1 to CH24.

  The signal assigning means 25 is connected to the six input means 1a to 1f and has a switch function for arbitrarily assigning these output signals to the first to 24th channel means CH1 to CH24. Accordingly, the output signals of the first to sixth input means 1a to 1f can be inputted simultaneously to only six selected from the first to 24th channel means CH1 to CH24.

  The first to 24th channel means CH1 to CH24 connected to the signal allocating means 25 are signal transfer paths with a recording / reproducing function, a signal processing function, and a mixer function, and are formed identically. Accordingly, only the first channel CH1 is shown in detail in FIG. 3, and the second to 24th channels CH2 to CH24 are simply shown as blocks. Each channel CH1 to CH24 is also called a track, a memory means 26, a first adder 27, a signal processing means 28, a second adder 29, a mixing signal forming means 30, and a signal selection And transfer means 31.

  The memory means 26 is connected to any one of the first to sixth input means 1a to 1f via the signal assignment means 25. The 24 memory means 26 of the 1st to 24th channels CH1 to CH24 function as 24 tracks for recording and reproducing audio signals, for example, the HDD 16 in FIG. 4 or the semiconductor memory capable of writing and reading in FIG. Composed by 16a. As shown schematically in FIG. 4, the HDD 16 includes a recording medium magnetic disk 40, the rotating device 41, a magnetic head 42, a positioning means 43 for the magnetic head 42, a recording / reproducing changeover switch 44, and a control means 45. It consists of. In the recording mode, the magnetic head 42 is connected to the recording signal input terminal 46 via the changeover switch 44. In the reproduction mode, the magnetic head 42 is connected to the reproduction output terminal 47 via the changeover switch 44. Positioning of the magnetic head 42 with respect to the magnetic disk 40 is performed by the positioning means 43. The control means 45 controls the positioning means 43 and the changeover switch 44 in response to the operation of the operation means 4 in FIG. The magnetic disk 40 equivalently includes the first to 24th tracks of the first to 24th channels CH1 to CH24.

  FIG. 5 shows a semiconductor memory device 16a that can be used as the memory means. The semiconductor memory device 16a includes a semiconductor memory 50, a write control circuit 51, and a read control circuit 52. The semiconductor memory device 16a writes a signal input from the input terminal 53 to the semiconductor memory 50, reads the written signal, and outputs it to the output terminal 54. send. The write control circuit 51 and the read control circuit 52 control the writing and reading of signals to and from the semiconductor memory 50 in response to the operation of the operation means 4 in FIG. In the semiconductor memory 50, the 1st to 24th tracks of the 1st to 24th channels of FIG.

  In FIG. 3, the first adding means 27 is an output signal of the memory means 26 of its own channel means and an input signal of the memory means 26 of its own channel means, that is, any one of the first to sixth input means 1a to 1f. Add one output signal. In order to perform this addition, one input terminal of the first addition means 27 is connected to the output terminal of the memory means 26, and the other input terminal of the signal selection transfer means 31 shown equivalently by a changeover switch. Connected to one contact a. The common terminal of the signal selection transfer means 31 is connected to the input line of the memory means 26 by the transmission path 32.

  The signal processing means 28 comprises effector means 33 and equalizer means 34. The effector means 33 connected to the first summing means 27 applies an acoustic effect such as distraction or phaser or compressor or delay, chorus, flanger, or echo to the output signal of the first summing means 27. Give. The equalizer means 34 connected to the effector means 33 gives a frequency characteristic called, for example, a three-band equalizer to the digital audio signal. The effector means 33 and the equalizer means 34 are configured to give a predetermined acoustic effect and frequency characteristics by processing digital signals.

  The second adding means 29 adds the output signal of the signal processing means 28 of its own channel means and the input signal of the memory means 26 of its own channel means. In order to execute this addition, one input terminal of the second addition means 29 is connected to the signal processing means 28, and the other input terminal is connected to the contact b of the signal selection transfer means 31. The signal selection transfer means 31 turns on the contact a or b in response to the operation of the switch 4a of the operation means 4. Whether the input signal of the memory means 26 is sent to the first or second adding means 27, 29 is determined by the user.

  The mixing signal forming means 30 comprises a signal level adjusting means 35 generally called a fader and a signal distribution means 36 generally called a pan. The signal level adjusting means 35 adjusts the level of the output signal of the second adding means 29. The signal distribution unit 36 divides the output signal of the signal level adjustment unit 35 into a desired ratio to form a mixing signal, and supplies this to the first and second lines 23L and 23R of the stereo bus 23.

  When recording a digital audio signal in the memory means 26, the memory means 26 is set in a recording state, and any one of the input means 1a to 1f is sent to the memory means 26 via the signal assignment means 25, where Recorded live. At this time, if the contact point a of the signal selection transfer means 31 is selected by the setting by the operation means 4, the recording input signal is transmitted through the transmission path 32, the signal selection transfer means 31, the first addition means 27, and the signal processing means. The signal is sent to the first output means 2a via 28, the second adding means 29, the mixing signal forming means 30, and the stereo bus 23, and monitored by a speaker (not shown). At this time, transfer of the recording input signal to the second adding means 29 is prohibited. If the user turns on the contact b of the signal selection transfer means 31, the recording input signal bypasses the signal processing means 28 and is input to the second addition means 29, and the output of the second addition means 29 is for mixing. The signal is sent to the first output means 2a via the signal forming means 30 and the stereo bus 23 and monitored by a speaker. In this case, monitoring in a live sound state becomes possible. In the recording mode when the contact b of the signal selection / transfer means 31 is selected, the output of the signal processing means 28 is zero, and the second addition means 29 is a simple signal path.

  In the reproduction mode, the memory means 26 is set to the reproduction state, and the reproduction output signal of the memory means 26 is the first addition means 27, the signal processing means 28, the second addition means 29, the mixing signal forming means 30, and the stereo bus 23. To the first output means 2a. When the input signal is not sent from the first to sixth input means 1a to 1f to the respective channels CH1 to CH24 in the reproduction mode, there is no input and output of the signal selection transfer means 31, so only the output signal of the memory means 26 Are input to the first addition means 27, and only the output of the signal processing means 28 is input to the second addition means 29. When there is a possibility that a signal is input to the channel means CH1 in the reproduction mode, and this input signal is not to be supplied to the first addition means 27 or the second addition means 29, the signal is selected by the signal selection transfer means 31. Means for prohibiting signal transfer, operating signal allocation means 25 to deallocate input signals, or means for prohibiting input signal transfer at the input stage of channel means CH1 are provided.

  At the time of punch-in / out, the memory means 26 is reproduced and monitored, and at the same time, performance or singing is performed, and a rewriting signal is sent from one of the first to sixth input means 1a to 1f to the first channel CH1, for example . The user determines the start time of rewriting by monitoring and operates, for example, a foot switch provided in the operation means 4. As a result, the memory means 26 enters the recording mode, and the input signal at this time is recorded in the memory means 26 as a rewrite signal. During rewriting of the memory means 26, an input signal is input to the first adding means 27 or the second adding means 29 via the signal selection transfer means 31, and the rewriting signal is output after the output signal of the memory means 26 immediately before rewriting. Is added and monitored. When the rewrite end time is reached, the user operates the operation means 4 to return the memory means 26 to the reproduction mode, and the reproduction output after the rewriting portion is monitored. According to this embodiment, monitoring during punch-in / out can be performed in the same manner as the monitoring ring during normal recording without using a cue monitor bus or the like.

This embodiment has the following effects.
(1) As is clear from FIG. 3, since the recording signal, reproduction signal, and monitoring signal paths are simplified, a user-friendly and easy-to-use recorder can be provided.
(2) Since the signal path is simplified, it is possible to reduce the calculation amount of the DSP 15 when realizing the same function as compared with the conventional model. For this reason, when there is a margin in the amount of computation of the DSP15, this margin can be increased by another function, such as an increase in the number of tracks that can be recorded / played simultaneously, an increase in the number of effectors that can be used simultaneously, and the number of bits of sound. It can be used for increase.
(3) Since the input signal is recorded in the memory means 26 in the state of a raw sound, the equalizing and effect processing of the signal processing means 28 are irrelevant to the recording, and recording failure due to these setting errors does not occur.
(4) Since the input signal is recorded in the state of raw sound, it is not necessary to initialize the settings for equalizing and effect processing in the signal processing means 28 when shifting from recording to track down. This greatly simplifies the operation and improves the work efficiency.

  Next, a mixer-integrated digital audio multitrack recorder according to the second embodiment will be described with reference to FIGS. However, in FIG. 6 and FIG. 7, parts that are substantially the same as those in FIG. 2 to FIG.

  FIG. 6 is a block diagram showing a part of the recorder according to the second embodiment as in FIG. The recorder of FIG. 6 is configured in the same manner as the first embodiment of FIGS. 2 to 5 except for the modified recording and mixer means 3a.

  The modified recording and mixer means 3a includes a plurality of (for example, 24) channel means CH1 ′, CH2 ′... That are slightly modified from the channel means CH1 to CH24 of FIG. 3, and an additional plurality (for example, eight). , The stereo bus 23 as the same main bus as in FIG. 3, the submix bus 24 as the added sub bus, the added effector means 62, and the added auxiliary circuit means 61a, 61b. Switch means 63. Although only two input means 1a and 1b are shown in FIG. 6, actually, six or eight input means are provided as in FIG. 6 shows only the first and second auxiliary circuit means 61a, 61b, but actually, the same number (for example, six or eight) as the input means 6a, 6b,.

  The first and second auxiliary circuit means 61a and 61b have the same configuration, and are supplied from input terminals 64a and 64b connected to the input means 1a and 1b, respectively, and digital devices other than the input means 1a and 1b. Input terminals 65a and 65b for receiving a digital audio signal are provided. Each auxiliary circuit means 61a, 61b has an input signal processing function and a mixer function or a signal distribution function. The signals processed by the auxiliary circuit means 61a and 61b are sent to one of the channel means CH1 ′, CH2 ′..., The stereo bus 23, and the submix bus 24.

  The submix bus 24 is provided to execute a process that cannot be performed using only the stereo bus 23, and has a pair of lines 24L and 24R like the stereo bus 23. The auxiliary circuit means 61a and 61b and the channel means CH1 ′ and CH2 ′ are connected to both the stereo bus 23 and the submix bus 24.

  The effector means 62 gives a desired acoustic effect to the signal of the submix bus 24. The pair of input terminals of the effector means 62 are connected to the pair of lines 24L and 24R of the submix bus 24, and the pair of output terminals are connected to the channel means CH1 ′ and CH2 ′ via the contacts a and b of the selection switch 63. In addition to being connected, it is connected to a pair of lines 23L and 23R of the stereo bus 23 via contacts c and d. The effector means 62 is shared by a plurality of channel means CH1 ′ and CH2 ′, and is also connected to channel means other than the channel means CH1 ′ and CH2 ′ shown in FIG.

  FIG. 7 is a block diagram showing in detail the first auxiliary circuit means 61a and the first channel means CH1 ′ of FIG. The auxiliary circuit means 61b,..., And channel means CH2 ′, not shown in FIG. 7, are also configured in the same manner as in FIG.

  The auxiliary circuit means 61a includes a selection switch 70 for selecting one of the two input terminals 64a and 65a, a signal adjustment circuit 71, an assignment switch 72, and a signal forming means for mixing including two signal distribution means 74 and 75. Means 73. The selection switch 70 and the assignment switch 72 operate in response to the operation of the operation means 4. The signal adjustment circuit 71 includes, for example, gain trimming means for digital input signals and 3-band EQ (equalizer) means. The assignment switch 72 connected to the signal adjustment circuit 71 has first, second, third and fourth contacts a, b, c and d. When the contact a is selected, the output of the signal adjustment circuit 71 is sent to the stereo bus 23 via the distribution means 74. When the contact b is selected, the output of the signal adjustment circuit 71 is sent to the submix bus 24 via the distribution means 75. When the contact c is selected, the output of the signal adjustment circuit 71 is sent to the first channel means CH1 ′ and other channel means. When the contact d is selected, transmission of the output of the signal adjustment circuit 71 is interrupted. The signal distribution means 74 and 75 distribute the output signal of the signal adjustment circuit 71 to the pair of lines 23L and 23R of the stereo bus 23 or the pair of lines 24L and 24R of the submix bus 24 at a ratio set by the operation of the operation means 4. Distribute. When the signals of the plurality of input means 1a, 1b,... Are distributed to the stereo bus 23 or the submix bus 24 by the auxiliary circuit means 61a, 61b,..., Signal mixing is achieved.

  The channel means CH1 ′ in FIG. 7 is the same as the memory means 26, the first and second addition means 27 and 29, the signal processing means 28, and the signal selection / transfer means 31 in the channel means CH1 in FIG. The channel means CH1 ′ of FIG. 7 is different from the channel means CH1 of FIG. 3 in that the channel means CH1 ′ has a signal assignment means 76 having the same function as the signal assignment means 25 of FIG. 3 is provided with mixing signal forming means 30 ′ in which a mixing signal forming function for the submix bus is added to the mixing signal forming means 30 of FIG.

  The signal assigning means 76 indicated by the switch is the first, second, third, fourth, fifth and sixth input selection contacts a, b, c, d, e, f and first and second. Effector signal selection contacts g and h, and the input signals of the contacts a to h are alternatively or exclusively selected. The first input selection contact a is connected to the signal adjustment circuit 71 via the contact c of the signal assignment means 72 of the auxiliary circuit means 73. The second to sixth input selection contacts b to f are different in the same configuration as the first auxiliary circuit 61a provided corresponding to the same as the second to sixth input means 1b to 1f of FIG. It is selectively connected to the auxiliary circuit. The first and second effector signal selection contacts g and h are connected to the submix bus 24 via the selection switch 63 and the effector means 62 of FIG. The output line 77 of the signal assigning means 76 is connected to the memory means 26. In the first embodiment, one output signal selected from the first to sixth input means 1a to 1f is inputted to the memory means 26, but in the second embodiment, the output signal of the effector means 62 shown in FIG. 6 is also inputted. Can do.

  7 includes a switch 78 and a signal distribution unit 79 in addition to the signal level adjustment unit 35 and the signal distribution unit 36 which are the same as those in FIG. The switch 78 is disposed between the signal level adjusting means 35 and the two signal distribution means 36 and 79, and a contact a for selecting one signal distribution means 36 and a contact b for selecting the other signal distribution means 79, Both have a contact c that is not selected. The added signal distribution means 79 is connected to a pair of lines 24L and 24R of the submix bus 24. The distribution ratio of the two signal distribution means 36 and 79 is set by the operation means 4.

  When recording the signal in the memory means 26 in the second embodiment, the recording input signal based on the signal supplied from the input means 1a, 1b,... Or the signal supplied to the digital signal input terminal 65a is a signal adjustment circuit 71, The signal is supplied to the memory means 26 via the signal assignment means 72 and 76. In the second embodiment, the switch 78 selects one of the signal distribution means 36 in the recording mode. Therefore, the signal on the input line 77 of the memory means 26 is the signal selection transfer means 31, the first addition means 27, the signal processing means 28, the second addition means 29, the signal level adjustment means 35, the switch 78, and one of the signals. From the first path consisting of distribution means 36 and stereo bus 23, or from signal selection transfer means 31, second addition means 29, signal level adjustment means 35, switch 78, one signal distribution means 36 and stereo bus 23 The second route is sent to the first output means 2a in FIG. 3 for monitoring.

  At the time of reproduction of the memory means 26, the switch 78 selects one of the signal distribution means 36, and the reproduction signal is the memory means 26, the first addition means 27, the signal processing means 28, the second addition means 29, and the signal level adjustment means. 35, the switch 78, and the signal distribution means 36 are sent to the stereo bus 23.

  Punch-in / out is achieved by supplying a recording signal and setting the recording mode in the same manner as in the first embodiment when reproducing the memory means 26. Monitoring at the time of punch-in / out is performed in the same manner as in the recording mode.

  The interlaced recording called bounce recording or ping-pong recording is possible with the recorder of FIGS. For example, bounce recording is achieved by transferring the digital audio signal of the memory means 26 of one channel to the submix bus 24 and transferring the signal of this submix bus 24 to the memory means 26 of another channel.

  Since the channels CH1 ′, CH2 ′,... Of the second embodiment are configured essentially the same as the channel means CH1 to CH24 of the first embodiment, the second embodiment has the same effect as the first embodiment. Further, since the second embodiment has the submix bus 24, it has an advantage that the common effector means 62 can be used in each channel CH1 ′ and CH2 ′, and bounce recording can be easily performed.

The present invention is not limited to the above-described embodiments, and for example, the following modifications are possible.
(1) The memory means 26 is not limited to the HDD 16 in FIG. 5 and the semiconductor memory 16a in FIG. 6, but can be configured by an optical disk device capable of recording / reproducing, a magneto-optical disk device, another magnetic recording device, or the like.
(2) The DSP 15 can be replaced with another digital circuit such as a microcomputer.
(3) Either the effector means 33 of the signal processing means 28 or the equalizer means 34 indicated by EQ can be omitted. Further, the signal processing means 28 may have another processing function such as a level adjusting means. Further, the effector means 33 can be a multistage connection of different types of effectors.
(4) The second addition means 29 and the signal selection / transfer means 31 can be omitted, and the input line of the memory means 26 can always be connected to the addition means 27.
(5) The first addition means 27 and the signal selection / transfer means 31 can be omitted, and the input line of the memory means 26 can always be connected to the second addition means 29.
(6) In FIG. 6, it is possible to directly connect the input means 1a, 1b... To the respective channels CH1 ′, CH2 ′ without the auxiliary circuit means 61a, 61b.
(7) The present invention can also be applied to a case where an analog signal similar to an audio signal is digitized and recorded and reproduced.

  The present invention is applicable to a signal recording / reproducing apparatus for recording / reproducing an audio signal.

It is a block diagram which shows roughly the conventional mixer integrated multitrack recorder. 1 is a block diagram schematically showing a mixer-integrated multi-track recorder according to Embodiment 1 of the present invention. FIG. FIG. 3 is a block diagram showing the mixer-integrated multi-track recorder of FIG. 2 in which the recording and mixer means of FIG. 2 are functionally shown. FIG. 4 is a block diagram schematically showing an HDD for the memory means of FIG. 3. 1 is a block diagram schematically showing a semiconductor memory device that can be used as a memory means. FIG. 4 is a block diagram showing a mixer-integrated multi-track recorder according to Embodiment 2 of the present invention, similar to FIG. FIG. 7 is a block diagram functionally showing a part of the recording and mixer means of FIG. 6.

Explanation of symbols

1a ~ 1f Input means
2a, 2b Output means
3, 3a Recording and mixer means
15 DSP
16 HDD
23 Stereo bus
24 Submix bus
26 Memory means
27 First addition means
28 Signal processing means
29 Second addition means
30 Signal formation circuit for mixing

Claims (9)

An input means for inputting an audio signal and outputting a digital audio signal;
An output means for inputting a digital audio signal and outputting the audio signal;
Channel means connected between the input means and the output means ,
The channel means includes
Memory means capable of alternatively executing recording of the digital audio signal output from the input means and reproduction of the digital audio signal recorded therein;
First addition means for adding the digital audio signal output from the input means and the digital audio signal reproduced from the memory means;
Signal processing means for performing desired processing on the digital audio signal output from the first addition means, and sending the processed digital audio signal to the output means ;
The digital audio signal output from the input means and the digital audio signal output from the signal processing means are connected between the signal processing means and the output means, and the digital signal after the addition processing is added. Second adding means for sending an audio signal to the output means;
Signal selection transfer means for selectively sending a digital audio signal output from the input means to the first addition means and the second addition means;
Have
When recording a digital audio signal in the memory means, the digital audio signal output from the input means is input to the memory means without going through the signal processing means, and when reproducing the digital audio signal from the memory means, A digital audio signal recording / reproducing apparatus for outputting a digital audio signal through the signal processing means . The input means is composed of a plurality of input means for inputting a plurality of audio signals as digital audio signals, and the channel means is a plurality of channel means arranged between the plurality of input means and the output means. 2. The digital audio signal recording / reproducing apparatus according to claim 1, wherein the apparatus is configured. And a signal allocating unit for selectively allocating output signals of the plurality of input units to the plurality of channel units between the plurality of input units and the plurality of channel units. The digital audio signal recording / reproducing apparatus according to claim 2. 4. A digital audio signal recording / reproducing apparatus according to claim 2, wherein said output means is a main bus capable of receiving and outputting output signals of said plurality of channel means. 5. The digital audio signal recording / reproducing apparatus according to claim 4, further comprising a digital-analog converter connected to the main bus. Furthermore, it has a sub-bus for assisting signal processing, a plurality of auxiliary circuit means provided corresponding to the plurality of input means, and an effector means,
Each of the plurality of auxiliary circuit means has means for selectively supplying an output signal of each input means to the main bus, the sub bus, and the plurality of channel means,
The effector means performs a desired process on the signal of the sub-bus, and sends the signal after the process to the plurality of channel means,
Each of the plurality of channel means further includes:
A signal assigning means for selecting one of the output signals of the plurality of input means and the output signal of the effector means as an input signal of its own channel means;
Means for selectively supplying the output of the signal processing means to the main bus and the sub bus;
5. The digital audio signal recording / reproducing apparatus according to claim 4, further comprising: 7. The digital audio signal recording / reproducing apparatus according to claim 1, wherein the signal processing means is at least one of an equalizer means and an effector means. 8. The digital audio signal according to claim 1, wherein the memory means is a magnetic disk recording / reproducing apparatus, an optical disk recording / reproducing apparatus, a magneto-optical disk recording / reproducing apparatus, or a readable / writable semiconductor memory. Recording / playback device. 9. The digital audio signal recording / reproducing apparatus according to claim 1, wherein the adding means and the signal processing means are a digital signal processing apparatus or a microcomputer.

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