JP2019215579A - Recording/reproducing device with radio lan function, and co-listening system - Google Patents

Abstract

To provide a recording/reproducing device and a co-listening system that allow a plurality of persons to easily co-listen by means of a portable device such as a smart phone and the like.SOLUTION: A recording/reproducing device 10 comprises a Wi-Fi module, and performs a Wi-Fi connection to a plurality of smart phones 12a, 12b, 12c and the like. The recording/reproducing device 10 reproduces an audio signal to transmit the reproduced audio signal by radio in accordance with a command from the smart phone 12a functioning as a master device. The recording/reproducing device 10 transmits the audio signal under reproduction even to the smart phones 12b and 12c by radio in accordance with commands from the smart phones 12b and 12c functioning as a slave device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a recording / reproducing apparatus, and more particularly to a recording / reproducing apparatus having a wireless LAN function and a co-listening system using the same.

  2. Description of the Related Art Conventionally, a technique has been proposed in which a single music player is shared by a plurality of people to listen to music.

  Patent Literature 1 describes a system in which a plurality of slave devices wirelessly connected are grouped around a master device (portable media player) to share media contents such as music and video.

  Patent Document 2 describes that two portable audio playback devices are connected by wire or wirelessly, one of which is positioned as a master device and the other is positioned as a slave device, and the music contents held by each are shared.

  Patent Document 3 discloses a system in which an audio signal reproduced by a first communication device is transmitted to another communication device, and the audio signal is reproduced by another communication device.

JP 2008-176320 A JP 2008-122738 A JP 2012-231530 A

  By the way, in recent years, portable devices, particularly smartphones, have been remarkably popularized, and there is an increasing need to listen to music contents on each smartphone.

  In Patent Literatures 1 and 2, music content is shared by using one of a plurality of smartphones as a master device and the other as a slave device, but music content stored in a higher-quality / high-performance playback device is shared. There is a problem that we cannot respond to the need to hear together.

  Patent Literature 3 is a system in which another communication device intervenes, and has a problem that it cannot meet the need for simple and easy co-listening.

  Furthermore, even when a plurality of people listen to music content stored in the same recording / reproducing device together, there may be cases where each person wants to listen to different parts, but there is a problem that conventional techniques cannot sufficiently cope with them.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to provide a recording / reproducing apparatus and a co-listening system that allow a plurality of persons to easily co-listen with a portable device such as a smartphone. Is to do.

  The present invention provides a wireless LAN module for performing wireless communication with a master device as a portable device and a slave device as a portable device, recording means for individually recording a plurality of tracks and recording the same on a recording medium, In response to the command, a first track of an audio signal including a plurality of tracks recorded on the recording medium is reproduced and wirelessly transmitted to the master device, and while reproducing the first track, Processing means for reproducing a second track different from the first track in the audio signal in response to a command from the slave device and wirelessly transmitting the reproduced signal to the slave device.

  In one embodiment of the present invention, when the command from the slave device is a playback start command, the processing unit is configured to perform a process when the audio signal is played back and wirelessly transmitted in response to a command from the master device. And wirelessly transmits the audio signal to the slave device.

  In another embodiment of the present invention, when the command from the master device is a playback stop command, the processing unit stops playback of the audio signal, and the command from the slave device is a playback stop command. Even in such a case, the command is invalidated.

  In still another embodiment of the present invention, the processing means reproduces an audio signal of three or more tracks recorded on a recording medium in response to a command from the master device and wirelessly transmits the reproduced audio signal.

  Further, the present invention is a co-listening system including a recording / reproducing device, a master device as a portable device, and a slave device as a portable device, wherein the recording / reproducing device wirelessly communicates with the master device and the slave device. A wireless LAN module, a recording unit for individually recording a plurality of tracks and recording the same on a recording medium, and an audio signal including the plurality of tracks recorded on the recording medium in response to a command from the master device. The first track of the audio signal is reproduced in accordance with a command from the slave device while the first track is reproduced and wirelessly transmitted to the master device, and the first track is reproduced. Processing means for reproducing a second track different from and wirelessly transmitting the second track to the slave device, wherein the master device and the slave device are: The transmitting device transmits identification information indicating whether the device is a master device or a slave device, and the reproducing device receives and reproduces the audio signal wirelessly transmitted from the recording / reproducing device. And

  ADVANTAGE OF THE INVENTION According to this invention, audio signals can be easily listened to by multiple persons using portable equipment, such as a smart phone. Also, by playing back audio signals of a plurality of channels of three or more channels by a playback device and wirelessly transmitting them, each person can listen to audio signals of a desired channel.

FIG. 1 is a system configuration diagram of an embodiment. It is a processing flowchart of an embodiment. 1 is a configuration block diagram of a recording / reproducing device according to an embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking a recording / reproducing apparatus having recording and reproducing functions as a reproducing apparatus as an example. However, the recording function is not necessarily required in the present invention.

  FIG. 1 is a system configuration diagram of the present embodiment. The recording / reproducing device 10 is wirelessly connected to a portable device having a wireless connection function. In the present embodiment, the smartphone 12 is exemplified as a portable device having a wireless connection function, and a wireless LAN, more specifically, a Wi-Fi connection is exemplified as a wireless connection. Smartphones equipped with a Wi-Fi module are known, and can connect to the Internet via an access point such as a wireless router.

  The recording / reproducing apparatus 10 has a well-known recording / reproducing function, processes an audio signal input from the built-in microphone 22 or the line input terminal 24, records it on a recording medium such as an SD card, and records the audio signal on the SD card. The audio signal is reproduced and output from the built-in speaker. The recording / reproducing device 10 includes a Wi-Fi module, and performs Wi-Fi connection with the plurality of smartphones 12a, 12b, and 12c. In FIG. 1, the recording / reproducing apparatus 10 is connected to three smartphones 12a, 12b, and 12c, but may be two or four or more. A technique for wirelessly connecting a plurality of mobile devices to an access point such as a Wi-Fi router is known.

  The user of the recording and reproducing apparatus 10 can play a desired music part and input a desired audio signal to the built-in microphone 22 or the line input terminal 24 of the recording and reproducing apparatus 10 to record. In the figure, a part of the musical instrument 14 such as a guitar is shown as a desired music part, but any other part such as a bass part, a vocal part, a drum part, etc. may be used. The recording / reproducing apparatus 10 inputs an audio signal generated by the musical instrument 14 and records it on a recording medium such as an SD card for recording. The recording / reproducing device 10 may be an MTR (multi-track recorder), and in this case, a music part can be recorded on each of a plurality of tracks. For example, a vocal part is recorded on a first track, a guitar part is recorded on a second track, a bass part is recorded on a third track, and a drum part is recorded on a fourth track. The audio signals recorded on these tracks are mixed down to two-channel stereo audio signals as necessary and output.

  Note that audio signals recorded on these tracks can be output as 4-channel signals without mixing down. This will be further described later.

  Each of the smartphones 12a, 12b, and 12c includes a Wi-Fi module, and makes a Wi-Fi connection with the recording / reproducing device 10. The user activates a predetermined application (application required for monitoring and controlling the recording / reproducing device 10) installed in the smartphones 12a, 12b, 12c, and controls the operation of the recording / reproducing device 10 by operating this application. .

  The recording / reproducing device 10 processes various commands transmitted from the smartphones 12a, 12b, and 12c via Wi-Fi, and performs recording or reproduction according to the commands. At this time, the recording / reproducing device 10 determines whether the smartphones 12a, 12b, 12c that have transmitted the command function as a master device or a slave device, and performs a process according to the determination result.

  That is, if the smartphone that has transmitted the command functions as a master device, recording start and stop, reproduction start and stop are executed according to the received command. For example, if the command is a reproduction start command, the recording / reproducing device 10 reproduces an audio signal recorded on a recording medium such as an SD card according to the command, and outputs the audio signal reproduced to the smartphone via a Wi-Fi connection. Send. On the other hand, if the smartphone that transmitted the command functions as a slave device, of the received commands, only the playback command is interpreted as a valid command, and the already played audio signal is transmitted to the smartphone in addition to the master device. I do.

  Whether the smartphones 12a, 12b, and 12c function as master devices or slave devices can be set in several ways. The first method is a priority setting method based on the connection order, in which a smartphone that is Wi-Fi connected to the recording / reproducing device 10 is set as a master device, and then a smartphone that is Wi-Fi connected to the recording / reproducing device 10 is a slave device. And so on. The second method is a unique setting method based on the setting information of the connected device. A specific smartphone is set as a master device among a plurality of Wi-Fi connected smartphones 12a, 12b, and 12c, and other smartphones are set as slaves. And the like. A menu for selecting whether to function as a master device or a slave device in an application installed in the smartphones 12a, 12b, and 12c is displayed, and when the user selects the master device, identification information indicating the fact is recorded / reproduced. 10 is recognized as a master device, and when a user selects a slave device, identification information to that effect is transmitted to the recording / reproducing device 10 to be recognized as a slave device.

  In FIG. 1, first, the smartphone 12a is first Wi-Fi connected to the recording / reproducing device 10 and is recognized as a master device, and thereafter, the smartphones 12b and 12c are Wi-Fi connected to the recording / reproducing device 10 and recognized as a slave device. It shall be assumed.

  The recording / reproducing device 10 executes recording start / stop, reproduction start / stop in response to a command from the smartphone 12a. When a playback start command of a desired audio signal (may include an audio signal during recording) is received from the smartphone 12a, the audio signal is read out from the recording medium and played back, and is transmitted to the smartphone 12a via the Wi-Fi connection. Transmit audio signal. The smartphone 12a receives the audio signal transmitted from the recording / reproducing device 10, and reproduces the audio signal using a predetermined application (an application required to listen to the audio signal output from the recording / reproducing device 10).

  Further, even if the recording / reproducing device 10 receives a recording start command, a stop command, and a reproduction stop command from the smartphone 12b, the recording / reproducing device 10 determines that the smartphone 12b functions as a slave device, and invalidates these commands. That is, the execution according to the command is not performed. However, the reproduction start command is received from the smartphone 12b, and the audio signal is reproduced according to the command from the smartphone 12a already functioning as the master device, and the audio signal is transmitted to the smartphone 12a via the Wi-Fi connection. If the condition is satisfied, the same audio signal is also transmitted to the smartphone 12b via the Wi-Fi connection on the assumption that the condition is satisfied. The smartphone 12b receives the audio signal transmitted from the recording / reproduction device 10, and reproduces the audio signal using a predetermined application. Therefore, the user of the smartphone 12b can reproduce and listen to the same audio signal as the user of the smartphone 12a.

  Further, even when the recording / reproducing device 10 receives a recording start command, a stop command, and a reproduction stop command from the smartphone 12c, the recording / reproducing device 10 determines that the smartphone 12c functions as a slave device, and invalidates these commands. That is, the execution according to the command is not performed. However, the reproduction start command is received from the smartphone 12c, and the audio signal is reproduced according to the command from the smartphone 12a already functioning as the master device, and the audio signal is transmitted to the smartphone 12a via the Wi-Fi connection. , The same audio signal is also transmitted to the smartphone 12c via the Wi-Fi connection on the assumption that the condition is satisfied. The smartphone 12c receives the audio signal transmitted from the recording / reproduction device 10, and reproduces the audio signal using a predetermined application. Therefore, similarly to the user of the smartphone 12b, the user of the smartphone 12c can reproduce and listen to the same audio signal as the user of the smartphone 12a.

  FIG. 2 is a processing flowchart in the recording / reproducing apparatus 10 of the present embodiment.

  First, the recording and playback device 10 makes a Wi-Fi connection with the smartphones 12a, 12b, and 12c (S101). That is, the Wi-Fi module is activated by operating the Wi-Fi button or icon of the recording / reproducing device 10. On the other hand, the user operates the Wi-Fi button on the smartphones 12a, 12b, and 12c to activate the Wi-Fi module. The smartphones 12a, 12b, and 12c detect the recording / reproducing device 10, and when an SSID, which is an identification name of an access point of the recording / reproducing device 10 in the wireless LAN, is displayed, a password corresponding to the SSID is input and Wi- Establish a Fi connection. Note that the password may be displayed on the display unit of the recording / reproducing device 10 and visually recognized by the user. The connection between the smartphone 12 and the recording / reproducing device 10 may be established using NFC (Near Field Communication) technology.

  When establishing a Wi-Fi connection with the smartphones 12a, 12b, and 12c, the recording and playback device 10 determines whether the connected smartphone functions as a master device or a slave device (S102). Now, it is assumed that the smartphone 12a is a master device and the smartphones 12b and 12c are slave devices.

  Upon receiving the command from the smartphone 12a, which is the master device, (S103), the recording / reproducing device 10 executes a process corresponding to the command. For example, in the case of reproduction, it is determined whether the command is a reproduction start command or a reproduction stop command (S104). If the command is a reproduction start command, the corresponding audio signal is read out from a recording medium such as an SD card and reproduced. (S105), the reproduced audio signal is transmitted from the Wi-Fi module to the smartphone 12a (S106). If the command is a reproduction stop command, the reproduction of the audio signal is stopped and the transmission is also stopped (S107). After the transmission processing of the reproduced audio signal in S106 and the stop processing in S107, the process shifts to S102, and shifts to a command waiting state.

  On the other hand, when the recording / reproducing device 10 receives a command from the smartphones 12b and 12c as slave devices (S108), the recording / reproducing device 10 validates the command only when the command is a reproduction start command, and outputs an audio signal according to a command from the smartphone 12a already being the master device. It is determined whether or not the signal is reproduced and transmitted. If the signal is transmitted, the same audio signal is transmitted to the smartphones 12b and 12c (S106). Note that even if a playback start command is received from the smartphones 12b and 12c before the playback start command from the smartphone 12a, the recording and playback device 10 invalidates this command and does not start playback.

  The recording / reproducing device 10 reproduces and transmits an audio signal in response to a command from the smartphone 12a, which is a master device. At this time, if audio signals are recorded on a plurality of tracks, the L channel and the In addition to mixing down and transmitting to the R channel, a plurality of tracks may be directly transmitted as a multi-channel. In the latter case, a track (channel) to be reproduced may be selected and reproduced for each of the smartphones 12a, 12b, and 12c.

Specifically, in response to a command from the smartphone 12a, which is the master device, the recording / reproducing device 10 reproduces the audio signal as a multi-channel audio signal of three or more channels, for example, four channels, and transmits it to the smartphone 12a. 4 channel audio signal
First channel: audio signal of vocal part Second channel: audio signal of guitar part Third channel: audio signal of bass part Fourth channel: audio signal of drum part The predetermined application installed in the smartphone 12a selectively reproduces only the audio signal of a specific channel, for example, the vocal part of the first channel, among the audio signals of four channels, according to the user operation of the smartphone 12a. .

  Next, in response to a command from the smartphone 12b, which is a slave device, the recording and playback device 10 transmits the same four-channel audio signals as the smartphone 12a to the smartphone 12b. However, the predetermined application installed in the smartphone 12b selectively reproduces only the audio signal of another channel, for example, the guitar part of the second channel, from the audio signals of four channels, in accordance with the user operation of the smartphone 12b. It is also possible.

  Further, in response to a command from the smartphone 12c which is a slave device, the recording / reproducing device 10 transmits the same four-channel audio signals as the smartphone 12a to the smartphone 12c. However, the predetermined application installed on the smartphone 12c is, in response to a user operation of the smartphone 12c, an audio signal of another channel, for example, an audio signal of a base part of the third channel and a drum part of the fourth channel, among the audio signals of four channels. It is also possible to selectively play back only.

  As described above, even if the same audio signal is transmitted from the recording / reproducing apparatus 10, by transmitting the same audio signal as a multi-channel audio signal, the smartphones 12a, 12b, and 12c can listen to different audio signals, respectively. It can respond to various needs of users.

In the present embodiment, the recording / reproducing device 10 validates only a reproduction start command among commands received from the smartphones 12b and 12c functioning as slave devices on the assumption that a specific condition is satisfied. Although commands other than the above are invalidated, a command that does not affect reproduction of an audio signal in another smartphone, particularly the smartphone 12a functioning as a master device, may be validated. The process may be executed with the command to be controlled being valid.
Further, each of the smartphones 12a, 12b, and 12c has a buffer memory, and when the received audio signal is stored in the buffer memory and played back, the command is not transmitted to the smartphones 12a, 12b, and 12c within a predetermined application. Through the processing, rewind reproduction for a predetermined time (for example, 3 seconds) is also possible.

  In the present embodiment, any one of the smartphones 12a, 12b, and 12c is recognized as a master device, and the other is recognized as a slave device. However, all the smartphones 12a, 12b, and 12c are recognized as master devices, and each of the smartphones 12a, 12b , 12c can execute the recording / playback process in response to the command transmitted from the device. However, it will be necessary to perform processing so that each command does not contradict or interfere with each other. For example, when a certain audio signal is being reproduced, a command other than the smartphone instructing the start of reproduction of the audio is invalidated, and a command received after the reproduction of the audio signal is completed is valid.

  Next, a specific configuration of the recording / reproducing device 10 according to the present embodiment will be described.

  FIG. 3 is a configuration block diagram of the recording / reproducing device 10 of the present embodiment. The recording / reproducing apparatus 10 includes a Wi-Fi module 20, a built-in microphone 22, a line input terminal 24, a built-in speaker 30, a display 32, an LED 33, an operation button 34, a system controller 36, and an SD connector 42.

  The Wi-Fi module 20 is a wireless LAN module that performs Wi-Fi connection with the smartphone 12 and data transmission / reception. The Wi-Fi module 20 is activated in response to the operation of the operation button 34, and establishes a Wi-Fi connection with the smartphone 12. Further, the Wi-Fi module 20 receives a command from the smartphone 12 and supplies the received command to the system controller 36. In addition, the Wi-Fi module 20 may transmit the status information supplied from the system controller 36 to the smartphone 12.

  The built-in microphone 22 is an R channel and L channel stereo microphone, and inputs an audio signal of a played musical instrument or the like and outputs it to an interface (I / F) 26.

  The line input terminal 24 inputs an audio signal from an external device via a line and outputs the audio signal to an interface (I / F) 26.

  The interface (I / F) 26 outputs an audio signal from the built-in microphone 22 or the line input terminal 24 to a codec (CODEC) 28.

  The codec (CODEC) 28 converts an input audio signal into a digital signal, compresses and encodes the digital signal, and supplies the digital signal to a system controller 36. In addition, the audio signal supplied from the system controller 36 is expanded and decoded, converted into an analog audio signal, and output from the built-in speaker 30. The codec (CODEC) 28 may be separated into a module for processing an audio signal from the built-in microphone 22 or the line input terminal 24 and a module for processing an audio signal output to the built-in speaker 30.

  The display 32 includes an LCD panel or an organic EL panel, and displays various status information of the recording / reproducing apparatus 10, for example, a recording / reproducing time counter and a recording level. The display 32 may be turned on or off by a control signal from the system controller 36.

  The LED 33 indicates the activation state and the connection state of the Wi-Fi module 20. The LED 33 is turned off when the Wi-Fi module is off, blinks when the Wi-Fi module 20 is on (standby state), and turns on when the Wi-Fi module 20 is on and Wi-Fi connected. .

  The operation button 34 is a button for instructing the operation of the recording and playback device 10. The operation buttons 34 include a Wi-Fi button for switching Wi-Fi on / off, a recording / playback / stop button, a recording level adjustment button, a track selection button, and the like. The operation buttons 34 may be configured as jog dials or touch buttons on the display 32. Even if the recording / reproducing device 10 and the smartphone 12 are Wi-Fi connected and the operation of the recording / reproducing device 10 can be controlled by the application of the smartphone 12, these operation buttons 34 are set to be continuously enabled (active state). That is, the system controller 36 interprets a command from the smartphone 12 and also receives an instruction from the operation button 34 at the same time.

  The system controller 36 includes a processor and a memory, and controls each unit of the recording / reproducing device 10. The system controller 36 executes various processes using the RAM 40 as a working memory according to the processing programs recorded in the ROM 38. The various processes include activation / off of the Wi-Fi module 20, establishment of connection with the smartphone 12, processing of an audio signal input from the built-in microphone 22 or the line input terminal 24, recording of the audio signal on the SD card, The reproduction of the audio signal, the control of turning on / off the display 32, the turning on / off / flashing of the LED 33, the processing for operating the operation button 34, and the like are included. The system controller 36 may include a plurality of processors and may cooperate with a PLD (programmable logic device).

  An SD card is attached to the SD connector 42. The system controller 36 records audio signals by recording them on an SD card. Also, the audio signal recorded on the SD card is read out and output from the built-in speaker 30 via the codec (CODEC) 28.

  The system controller 36 activates the Wi-Fi module 20 according to the operation of the operation button 34. When the Wi-Fi connection of the smartphone 12 is established by the Wi-Fi module 20, the system controller 36 receives a command from the smartphone 12, and executes recording start, recording stop, reproduction start, or the like according to the command.

  The system controller 36 recognizes one of the plurality of Wi-Fi connected smartphones as a master device and recognizes the other as a slave device. When the smartphone 12a is recognized as a master device using the master / slave identification information transmitted from the smartphone 12a, a flag to that effect is stored in the RAM 40 together with the ID of the smartphone 12a. When the smartphones 12b and 12c are recognized as slave devices using the master / slave identification information transmitted from the smartphones 12b and 12c, a flag to that effect is stored in the RAM 40 together with the IDs of the smartphones 12b and 12c. When a command from the smartphone 12a is received, it is determined whether the command is a master device command or a slave device command using a flag stored in the RAM 40, and the command is validated or invalidated.

  As described above, according to the present embodiment, by connecting the recording / reproducing device 10 and the plurality of smartphones 12a, 12b, 12c via Wi-Fi, a plurality of persons can simplify the audio signal recorded on the recording / reproducing device 10. And you can listen to it easily. Also, by transmitting an audio signal in multiple channels from the recording / reproducing device 10 and selectively reproducing the channel to be reproduced on each of the smartphones 12a, 12b, and 12c, only the desired audio signal can be heard.

  In the present embodiment, the Wi-Fi connection is exemplified as the wireless connection, but Bluetooth (registered trademark) or the like may be used.

  In the present embodiment, a list of connected smartphones may be created from the recording / reproducing device 10 to the smartphones 12a, 12b, and 12c and transmitted via a Wi-Fi connection. A predetermined application of each of the smartphones 12a, 12b, and 12c receives the list and displays the list on the screen. By visually recognizing this screen, the user can confirm which smartphone is connected to the recording / reproducing device 10. It is preferable that the smartphone that functions as the master device is specified and displayed in the list, and that the smartphone that functions as the master device can be changed in the list.

  In addition, a plurality of recording / reproducing devices 10 are provided, and a smartphone functioning as a slave device is connected to one of the recording / reproducing devices 10 by Wi-Fi to selectively switch audio signals reproduced by the recording / reproducing device 10. You can also listen.

  Further, in the present embodiment, a first mode in which one of a plurality of smartphones is set as a master device and the other as a slave device may be switched to a second mode in which all smartphones are set as master devices. . However, as described above, in the case of the second mode, it is necessary to perform processing so that each command from each smartphone does not contradict or interfere with each other. In this case, it is possible to interpret the transmission source of the command to be processed preferentially as a master device and the other transmission sources as slave devices.

  Reference Signs List 10 recording / reproducing device, 12a, 12b, 12c smartphone, 14 musical instrument, 20 Wi-Fi module, 22 built-in microphone, 24 line input terminal, 30 built-in speaker, 32 display, 33 LED, 34 operation button, 36 system controller, 42 SD connector.

Claims (5)

A wireless LAN module that performs wireless communication with a master device that is a mobile device and a slave device that is a mobile device;
Recording means for individually recording a plurality of tracks and recording them on a recording medium;
In response to a command from the master device, a first track of an audio signal including a plurality of tracks recorded on the recording medium is reproduced and wirelessly transmitted to the master device to reproduce the first track. Processing means for reproducing a second track different from the first track in the audio signal in response to a command from the slave device, and wirelessly transmitting the second track to the slave device;
A recording / reproducing apparatus having a wireless LAN function, comprising: The recording / reproducing apparatus having a wireless LAN function according to claim 1,
The processing means, when the command from the slave device is a playback start command, the audio signal to the slave device when the audio signal is reproduced and wirelessly transmitted in response to a command from the master device A recording / reproducing apparatus having a wireless LAN function, which performs wireless transmission. A recording / reproducing apparatus having a wireless LAN function according to claim 1,
The processing means stops the reproduction of the audio signal when the command from the master device is a reproduction stop command, and invalidates the command even when the command from the slave device is a reproduction stop command. A recording / reproducing apparatus having a wireless LAN function. A recording / reproducing apparatus having a wireless LAN function according to claim 1,
The recording / reproducing device having a wireless LAN function, wherein the processing means reproduces an audio signal of three or more tracks recorded on a recording medium in response to a command from the master device and wirelessly transmits the audio signal. A co-listening system including a recording / reproducing device, a master device as a portable device, and a slave device as a portable device,
The recording and playback device,
A wireless LAN module for performing wireless communication with the master device and the slave device;
Recording means for individually recording a plurality of tracks and recording them on a recording medium;
In response to a command from the master device, a first track of an audio signal including a plurality of tracks recorded on the recording medium is reproduced and wirelessly transmitted to the master device to reproduce the first track. Processing means for reproducing a second track different from the first track in the audio signal in response to a command from the slave device, and wirelessly transmitting the second track to the slave device;
With
The master device and the slave device each include:
Transmitting means for transmitting identification information as to whether the device is a master device or a slave device;
Playback means for receiving and playing back the audio signal wirelessly transmitted from the recording and playback device,
A co-listening system comprising:

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