Signal transmitter and signal transmission method

Abstract

The embodiments of the present application disclose a signal transmitter and a signal transmission method, which relate to the field of electronic technology and can simultaneously transmit audio signals and MIDI signals between electronic devices and electro-acoustic instruments. The signal transmitter includes: a hub, an electronic device connector, an audio signal output connector, and a MIDI signal input / output connector; the first signal channel of the hub is electrically connected to the electronic device connector, the second signal channel of the hub is electrically connected to the audio signal output connector, and the third signal channel of the hub is electrically connected to the MIDI signal input / output connector; wherein the second signal channel and the third signal channel are respectively electrically connected to the first signal channel. The present application is applicable to electronic device technology.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a signal transmitter and a signal transmission method. Background Art

[0002] In order to achieve the goal of playing music on an electronic device (such as a smartphone) through an electro-acoustic instrument (such as an electric drum set) while intelligently evaluating the user's performance on the electro-acoustic instrument on the electronic device, it is necessary to electrically connect the audio signal interface of the electronic device to the audio signal interface of the electro-acoustic instrument for transmitting the audio signal. At the same time, it is also necessary to electrically connect the interface of the electronic device (such as a USB interface) to the corresponding interface of the electro-acoustic instrument for transmitting Musical Instrument Digital Interface (MIDI) signals.

[0003] However, currently, various electronic equipment manufacturers have cancelled audio signal interfaces, which makes it impossible for electronic equipment to be electrically connected to electro-acoustic instruments through audio signal interfaces, and audio signals and MIDI signals cannot be transmitted between electronic equipment and electro-acoustic instruments at the same time. Summary of the Invention

[0004] Embodiments of the present application provide a signal transmitter and a signal transmission method, which enable audio signals and MIDI signals to be simultaneously transmitted between an electronic device and an electro-acoustic musical instrument.

[0005] In a first aspect, one or more embodiments of the present application provide a signal transmitter, comprising: a hub, an electronic device connector, an audio signal output connector, and a MIDI signal input / output connector; the first signal channel of the hub is electrically connected to the electronic device connector, the second signal channel of the hub is electrically connected to the audio signal output connector, and the third signal channel of the hub is electrically connected to the MIDI signal input / output connector; wherein the second signal channel and the third signal channel are electrically connected to the first signal channel, respectively; audio signals and / or MIDI signals are transmitted to the first signal channel via the electronic device connector, and then transmitted to the second signal channel via the hub, and finally output via the audio signal output connector; and / or MIDI signals are transmitted to the third signal channel via the MIDI signal input / output connector, and then transmitted to the first signal channel via the hub, and finally output via the electronic device connector.

[0006] Optionally, the signal transmitter further includes a digital-to-analog converter; an input channel of the digital-to-analog converter is electrically connected to the second signal channel of the hub, and an output channel of the digital-to-analog converter is electrically connected to the audio signal output connector.

[0007] Optionally, the hub is a USB hub.

[0008] Optionally, the electronic device connector is one of the following connector types: a lightning connector, a MiniUSB connector, a Micro USB connector, and a USB Type C connector.

[0009] Optionally, the signal transmitter further includes a connector converter, and the connector converter is electrically connected to the electronic device connector.

[0010] Optionally, the electronic device connector is a USB Type A connector, and the connector converter is an OTG converter.

[0011] Optionally, the MIDI signal input / output connector is a USB Type B connector.

[0012] In a second aspect, an embodiment of the present application provides a signal transmission method, which is applied to any of the aforementioned signal transmitters. When an electro-acoustic musical instrument needs to be electrically connected to an electronic device, the electronic device connector of the signal transmitter is electrically connected to the data interface of the electronic device, the MIDI signal input / output connector of the signal transmitter is electrically connected to the MIDI interface on the electro-acoustic musical instrument, and the audio signal output connector of the signal transmitter is electrically connected to the audio interface on the electro-acoustic musical instrument.

[0013] The method comprises: receiving an audio signal sent by an electronic device, and receiving a MIDI signal sent by an electro-acoustic instrument;

[0014] The audio signal is transmitted to the electro-acoustic instrument electrically connected to the audio signal output connector through the second signal channel; and the MIDI signal is transmitted to the electronic device electrically connected to the electronic device connector through the third signal channel.

[0015] Optionally, after the electronic device connector receives the audio signal and the MIDI signal, the method further includes: separating the audio signal and the MIDI signal.

[0016] Optionally, transmitting the audio signal through the second signal channel to the electroacoustic instrument electrically connected to the audio signal output connector includes: transmitting the audio signal through the second signal channel to a digital-to-analog converter; the audio signal is a digital audio signal;

[0017] The audio signal is converted into an analog audio signal by the digital-to-analog converter and output to an electroacoustic instrument electrically connected to the audio signal output connector.

[0018] One or more embodiments of the present application provide a signal transmitter, comprising: a hub, an electronic device connector, an audio signal output connector, and a MIDI signal input / output connector, wherein the first signal channel of the hub is electrically connected to the electronic device connector, the second signal channel of the hub is electrically connected to the audio signal output connector, and the third signal channel of the hub is electrically connected to the MIDI signal input / output connector; wherein the second signal channel and the third signal channel are electrically connected to the first signal channel, respectively. In this way, based on the above electrical connection relationship, after the electronic device and the electro-acoustic musical instrument are electrically connected to the signal transmitter, the audio signal and / or MIDI signal generated by the electronic device can be transmitted to the first signal channel of the hub via the electronic device connector, then transmitted to the second signal channel via the hub, and finally output to the electro-acoustic musical instrument via the audio signal output connector. At the same time, the MIDI signal generated by the electro-acoustic musical instrument can be transmitted to the third signal channel via the MIDI signal input / output connector, then transmitted to the first signal channel via the hub, and finally output to the electronic device via the electronic device connector. In this way, audio signals and MIDI signals can be transmitted simultaneously between the electronic device and the electro-acoustic musical instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a structural diagram of a signal transmitter according to one or more embodiments of the present application;

[0021] Figure 2 is a circuit diagram of an audio signal output connector according to one or more embodiments of the present application;

[0022] Figure 3 is a structural schematic diagram of another signal transmitter according to one or more embodiments of the present application;

[0023] Figure 4 is a circuit diagram of a digital-to-analog converter according to one or more embodiments of the present application;

[0024] Figure 5 is a circuit diagram of a USB hub according to one or more embodiments of the present application;

[0025] Figure 6is a circuit diagram of a USB Type A connector according to one or more embodiments of the present application;

[0026] Figure 7 1 is a circuit diagram of a USB Type B connector according to one or more embodiments of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, a signal transmitter is provided for one or more embodiments of the present application, which may include: a hub 11, an electronic device connector 12, an audio signal output connector 13 and a MIDI signal input / output connector 14; the first signal channel of the hub 11 is electrically connected to the electronic device connector 12, the second signal channel of the hub 11 is electrically connected to the audio signal output connector 13, and the third signal channel of the hub 11 is electrically connected to the MIDI signal input / output connector 14; wherein the second signal channel and the third signal channel are electrically connected to the first signal channel respectively; the audio signal and / or MIDI signal is transmitted to the first signal channel via the electronic device connector 12, and then transmitted to the second signal channel via the hub, and finally output via the audio signal output connector 13; and / or the MIDI signal is transmitted to the third signal channel via the MIDI signal input / output connector 14, and then transmitted to the first signal channel via the hub, and finally output via the electronic device connector 12.

[0030] In the embodiment of the present application, the electronic device can be a mobile phone, tablet computer, or other device used to interact with an electro-acoustic instrument. The audio signal output connector 13 is a coaxial audio plug with a diameter of 3.5 mm. When the audio signal interface is removed from the electronic device, the electronic device is electrically connected to the signal transmitter only through the electronic device connector 12. Through the electrical connection with the electronic device connector 12, the electronic device can transmit audio signals and MIDI signals to the signal transmitter.

[0031] The audio interface of the electro-acoustic instrument can be electrically connected to the audio signal output connector 13, so that the electro-acoustic instrument and the signal transmitter can realize audio signal interaction. Similarly, the MIDI signal interface of the electro-acoustic instrument can be electrically connected to the MIDI signal input / output connector 14, so that the electro-acoustic instrument and the signal transmitter can realize MIDI signal interaction. In addition, the second signal channel in the hub 11 is electrically connected to the first signal channel, so that the signal can be transmitted from the first signal channel to the second signal channel, or from the second signal channel to the first signal channel. Similarly, the third signal channel in the hub 11 is electrically connected to the first signal channel, so that the signal can be transmitted from the first signal channel to the third signal channel, or from the third signal channel to the first signal channel. Among them, Figure 2 Shows a circuit diagram of an audio signal output connector, but the present invention Figure 2 It is only used for illustrative purposes and does not limit the scope of protection of the present invention.

[0032] Based on the above electrical connection relationship, after the electronic device and the electro-acoustic musical instrument are respectively electrically connected to the signal transmitter, the audio signal and / or MIDI signal generated by the electronic device can be transmitted to the first signal channel of the hub via the electronic device connector, then transmitted to the second signal channel via the hub, and finally output to the electro-acoustic musical instrument via the audio signal output connector. Simultaneously, the MIDI signal generated by the electro-acoustic musical instrument can be transmitted to the third signal channel via the MIDI signal input / output connector, then transmitted to the first signal channel via the hub, and finally output to the electronic device via the electronic device connector. In this way, audio signals and MIDI signals can be transmitted simultaneously between the electronic device and the electro-acoustic musical instrument.

[0033] For example, when audio signals and MIDI signals can be transmitted simultaneously between electronic devices and electronic musical instruments, the following scenarios can be realized:

[0034] 1. Electroacoustic instrument learning scenario

[0035] Audio signals can be transmitted from electronic devices to electro-acoustic instruments and played on the electro-acoustic instruments. At the same time, MIDI signals generated by the user's performance on the electro-acoustic instrument based on the audio played above can also be transmitted to the electronic device. The software InstaDrum on the electronic device can intelligently score the user's performance based on the MIDI signals.

[0036] 2. Professional musicians composing music

[0037] Audio signals can be transmitted from electronic devices to electro-acoustic instruments and played on the electro-acoustic instruments. At the same time, professional musicians can perform on electro-acoustic instruments based on the audio played above, and transmit the MIDI signals generated by the performance to electronic devices. The software GarageBand on the electronic devices can compose music based on the audio played above according to the MIDI signals.

[0038] 3. Music game scene

[0039] An audio signal can be transmitted from an electronic device to a first electro-acoustic instrument (such as an external audio device), and the audio signal can be played on the first electro-acoustic instrument. At the same time, the user can play a game on a second electro-acoustic instrument (such as a drum machine, hand drum, or MIDI keyboard). The MIDI signal generated by the game is transmitted to the electronic device, so that the user can listen to the sound played by the audio signal while the electronic device can judge the user's gaming level.

[0040] In one or more embodiments of the present application, Figure 3 As shown, the signal transmitter further includes a digital-to-analog converter 15 ; an input channel of the digital-to-analog converter 15 is electrically connected to the second signal channel of the hub 11 , and an output channel of the digital-to-analog converter 15 is electrically connected to the audio signal output connector 13 .

[0041] Generally speaking, most electro-acoustic instruments are suitable for processing analog audio signals, while many electronic devices currently output digital audio signals. In this case, the digital audio signals directly output by the electronic devices are not suitable for processing by electro-acoustic instruments.

[0042] The embodiment of the present application provides a digital-to-analog converter 15 between the second signal channel of the hub 11 and the audio signal output connector 13, so that the transmitted digital audio signal can be converted into an analog audio signal so that the electro-acoustic instrument can process the analog audio signal after receiving it. Figure 4 Shows a circuit diagram of a digital-to-analog converter, but the present invention Figure 4 It is only used for illustrative purposes and does not limit the scope of protection of the present invention.

[0043] In one or more embodiments of the present application, the hub is a USB hub.

[0044] The USB (Universal Serial Bus) hub is used to expand the USB interface. In the embodiment of the present application, the first signal channel can be expanded into the second signal channel and the third signal channel through the USB hub. The USB hub can realize the expansion function through the USB hub chip and its peripheral circuits. Figure 5That is, a circuit diagram of a USB hub is shown. It should be noted that the present invention Figure 5 This is for illustrative purposes only and does not limit the scope of protection of the present invention. The hub used in the embodiments of the present application may be a USB hub. In this way, when transmitting audio signals or MIDI signals between electronic devices and electro-acoustic instruments, the USB bus protocol is used, which has many advantages such as plug-and-play, fast transmission speed, strong scalability, unified standards, and low price.

[0045] In one or more embodiments of the present application, the electronic device connector 12 is one of the following connector types: a lightning connector, a Mini USB connector, a Micro USB connector, and a USB Type C connector.

[0046] There are many different types of electronic devices available today, and different types of electronic devices are equipped with different types of interfaces. Specifically, if the electronic device is an iPhone with a Lightning interface, the electronic device connector 12 can be designed as a Lightning connector to facilitate electrical connection with the iPhone's Lightning interface. Similarly, the electronic device connector 12 can also be designed as one of a Mini USB connector, a Micro USB connector, and a USB Type-C connector to accommodate electronic devices with corresponding interfaces.

[0047] In one or more embodiments of the present application, the signal transmitter may further include a connector converter, and the connector converter is electrically connected to the electronic device connector 12 .

[0048] As mentioned above, the types of interfaces on various electronic devices are not the same. In order to be able to adapt to a certain electronic device interface, the signal transmitter may also include a connector converter, one end of the connector converter is used to electrically connect to the electronic device connector 12, and the other end of the connector converter is used to electrically connect to the corresponding interface of the aforementioned electronic device. For example, if the electronic device connector 12 is a USB Type C connector, and the interface of the electronic device is a lightning interface type, the two cannot be directly electrically connected. In an embodiment of the present application, one end of the connector converter can be designed as a USB Type C interface for electrical connection to the electronic device connector 12, and the other end can be designed as a lightning connector type for electrical connection to the lightning interface of the electronic device. It can be seen that the use of a connector converter can greatly improve the versatility of the signal transmitter and expand the application range of the signal transmitter.

[0049] In one or more embodiments of the present application, the electronic device connector 12 may be a USB Type A connector, and the connector converter may be an OTG converter.

[0050] The OTG (On-The-Go) function is a new USB transmission technology used for data exchange between different devices. In an embodiment of the present application, the electronic device connector 12 can be a USB Type A connector type, suitable for electrical connection to the USB Type A interface of the OTG converter. The connector at the other end of the OTG converter can be designed to be a connector type that is compatible with the target electronic device connector. For example, if the interface type of the target electronic device is a lightning interface, the connector at the other end of the OTG converter can be designed to be a lightning connector type. Similarly, if the interface of the target electronic device is a Mini USB interface or a Micro USB interface or a USB Type C interface, the connector at the other end of the OTG converter can be adaptively designed to be a MiniUSB connector or a Micro USB connector or a USB Type C connector so that the two can be electrically connected. Figure 6 That is, a circuit diagram of a USB Type A connector is shown. It should be noted that the present invention Figure 6 It is only used for illustrative purposes and does not limit the scope of protection of the present invention.

[0051] In one or more embodiments of the present application, the MIDI signal input / output connector is a USB Type B connector.

[0052] Currently, the MIDI signal transmission port of most electro-acoustic musical instruments adopts the USB Type B interface type. The embodiment of the present application designs the MIDI signal input / output connector as a USB Type B connector type, so that the signal transmitter can be electrically connected to most electro-acoustic musical instruments, thereby expanding the application range of the signal transmitter. Figure 7 That is, a circuit diagram of a USB Type B connector is shown. It should be noted that the present invention Figure 7 It is only used for illustrative purposes and does not limit the scope of protection of the present invention.

[0053] In the second aspect, an embodiment of the present application provides a signal transmission method, which is applied to any of the aforementioned signal transmitters. When it is necessary to electrically connect an electro-acoustic musical instrument to an electronic device, the electronic device connector 12 of the signal transmitter is electrically connected to the data interface of the electronic device, the MIDI signal input / output connector 14 of the signal transmitter is electrically connected to the MIDI interface on the electro-acoustic musical instrument, and the audio signal output connector 13 of the signal transmitter is electrically connected to the audio interface on the electro-acoustic musical instrument. The signal transmission method provided by an embodiment of the present application may include: receiving an audio signal sent by an electronic device, and receiving a MIDI signal sent by an electro-acoustic musical instrument; transmitting the audio signal to the electro-acoustic musical instrument electrically connected to the audio signal output connector 13 through a second signal channel; and transmitting the MIDI signal to the electronic device electrically connected to the electronic device connector 12 through a third signal channel.

[0054] When the audio signal interface of an electronic device is removed and it is necessary to connect the electronic device to an electro-acoustic instrument, any of the signal transmitters in the aforementioned embodiments can be used to achieve electrical connection between the two. Specifically, the electronic device connector 12 of the signal transmitter can be electrically connected to the data interface of the electronic device, the MIDI signal input / output connector 14 of the signal transmitter can be electrically connected to the MIDI interface on the electro-acoustic instrument, and the audio signal output connector 13 of the signal transmitter can be electrically connected to the audio interface on the electro-acoustic instrument. In this way, the signal transmitter can receive audio signals sent by the electronic device, and can also receive MIDI signals sent by the electro-acoustic instrument, and transmit the audio signals to the electro-acoustic instrument electrically connected to the audio signal output connector 13 through the first signal channel, the hub, and the second signal channel. At the same time, the MIDI signals can also be transmitted to the electronic device electrically connected to the electronic device connector 12 through the third signal channel, the hub, and the first signal. In this way, audio signals and MIDI signals can be transmitted between the electronic device and the electro-acoustic instrument at the same time.

[0055] Optionally, after the electronic device connector 12 receives the audio signal and the MIDI signal, the signal transmission method provided in the embodiment of the present application may further include: separating the audio signal and the MIDI signal.

[0056] In an embodiment of the present application, the electronic device connector 12 can receive audio signals from the electronic device and transmit them to the electro-acoustic instrument, and can also receive MIDI signals from the electronic device and transmit them to the electro-acoustic instrument, thereby realizing the setting of parameters such as timbre.

[0057] When the electronic device connector 12 receives both audio and MIDI signals from the electronic device, it can first separate the two signals and then transmit the separated audio signal to the electronic instrument via the hub and the second signal channel, thereby facilitating playback of the audio signal. Simultaneously, the separated MIDI signal can also be transmitted to the electronic instrument via the hub and the third signal channel to enable setting of relevant parameters of the electronic instrument.

[0058] Optionally, transmitting the audio signal through the second signal channel to the electro-acoustic musical instrument electrically connected to the audio signal output connector includes: transmitting the audio signal through the second signal channel to a digital-to-analog converter; the audio signal is a digital audio signal; converting the audio signal into an analog audio signal through the digital-to-analog converter and outputting it to the electro-acoustic musical instrument electrically connected to the audio signal output connector.

[0059] Generally speaking, most electro-acoustic instruments are suitable for processing analog audio signals, while many electronic devices currently output digital audio signals. In this case, the digital audio signals directly output by the electronic devices are not suitable for processing by electro-acoustic instruments.

[0060] In the embodiment of the present application, the analog audio signal is transmitted to the digital-to-analog converter through the second signal channel, and the digital audio signal is converted into an analog audio signal through the digital-to-analog converter, and the analog audio signal is output to the electro-acoustic instrument electrically connected to the audio signal output connector 13, so that the electro-acoustic instrument can directly process the analog audio signal after receiving it.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0062] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0063] In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] For the convenience of description, the above device is described as being divided into various units / modules based on their functions. Of course, when implementing this application, the functions of each unit / module can be implemented in the same or multiple software and / or hardware.

[0065] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0066] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A signal transmitter, characterized in that: include: Hub, electronic device connector, audio signal output connector, and MIDI signal input / output connector; The first signal channel of the hub is electrically connected to the electronic device connector, the second signal channel of the hub is electrically connected to the audio signal output connector, and the third signal channel of the hub is electrically connected to the MIDI signal input / output connector; wherein the second signal channel and the third signal channel are electrically connected to the first signal channel respectively; The audio signal and the MIDI signal are transmitted to the first signal channel via the electronic device connector, then transmitted to the second signal channel via the hub, and finally output via the audio signal output connector; The MIDI signal is transmitted to the third signal channel via the MIDI signal input / output connector, then transmitted to the first signal channel via the hub, and finally output via the electronic device connector; When the electronic device connector receives both an audio signal and a MIDI signal from the electronic device at the same time, it is used to separate the audio signal and the MIDI signal.

2. The signal transmitter according to claim 1, wherein: The signal transmitter further comprises a digital-to-analog converter; an input channel of the digital-to-analog converter is electrically connected to the second signal channel of the hub, and an output channel of the digital-to-analog converter is electrically connected to the audio signal output connector.

3. The signal transmitter according to claim 1, wherein: The hub is a USB hub.

4. The signal transmitter according to claim 1, wherein: The electronic device connector is one of the following connector types: lightning connector, Mini USB connector, Micro USB connector and USB Type C connector.

5. The signal transmitter according to claim 1, wherein: The signal transmitter further comprises a connector converter, and the connector converter is electrically connected to the electronic device connector.

6. The signal transmitter according to claim 5, characterized in that The electronic device connector is a USB Type A connector, and the connector converter is an OTG converter.

7. The signal transmitter according to claim 1, wherein: The MIDI signal input / output connector is a USB Type B connector.

8. A signal transmission method, characterized in that: Applicable to the signal transmitter according to any one of claims 1 to 7, when it is necessary to electrically connect an electro-acoustic musical instrument to an electronic device, the electronic device connector of the signal transmitter is electrically connected to the data interface of the electronic device, the MIDI signal input / output connector of the signal transmitter is electrically connected to the MIDI interface on the electro-acoustic musical instrument, and the audio signal output connector of the signal transmitter is electrically connected to the audio interface on the electro-acoustic musical instrument; The method comprises: receiving an audio signal sent by an electronic device, and receiving a MIDI signal sent by an electro-acoustic instrument; The audio signal is transmitted to an electro-acoustic instrument electrically connected to the audio signal output connector via a second signal channel; and the MIDI signal is transmitted to an electronic device electrically connected to the electronic device connector via a third signal channel; after the electronic device connector receives the audio signal and MIDI signal, the method further includes: separating the audio signal and the MIDI signal.

9. The signal transmission method according to claim 8, wherein: The step of transmitting the audio signal to the electro-acoustic instrument electrically connected to the audio signal output connector via the second signal channel comprises: transmitting the audio signal to a digital-to-analog converter via the second signal channel; the audio signal is a digital audio signal; The audio signal is converted into an analog audio signal by the digital-to-analog converter and output to an electroacoustic instrument electrically connected to the audio signal output connector.

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