CN212543854U - Multifunctional external mobile phone sound card - Google Patents
Multifunctional external mobile phone sound card Download PDFInfo
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- CN212543854U CN212543854U CN202021836505.9U CN202021836505U CN212543854U CN 212543854 U CN212543854 U CN 212543854U CN 202021836505 U CN202021836505 U CN 202021836505U CN 212543854 U CN212543854 U CN 212543854U
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Abstract
A multifunctional external mobile phone sound card is provided with an internal circuit for processing audio signals and an equipment interface for connecting the internal circuit; the device interface includes: a microphone input interface for connecting a microphone, a mobile phone audio input/output interface for connecting a mobile phone, an auxiliary sound source input interface for connecting an auxiliary sound source signal, an earphone output interface for connecting an earphone and a linear output interface for outputting an audio signal; the internal circuit outputs dry sound signals from one or more of the mobile phone audio input/output interface, the earphone output interface and the linear output interface after sound effect processing, or outputs wet sound signals from one or more of the mobile phone audio input/output interface, the earphone output interface and the linear output interface. Compared with the prior art, the beneficial effects of the utility model reside in that: the mobile phone is connected independently and used as an external mobile phone sound card, a plurality of paths of auxiliary sound sources can be connected to be matched with a microphone for inputting, more abundant sound effect processing is achieved, the function of listening to wet and recording the sound is achieved, and the operation setting is visual and simple.
Description
Technical Field
The utility model relates to an audio processing technology field specifically is a multi-functional external cell-phone sound card.
Background
The sound card, also called audio card and sound effect card, is developed as a kind of computer hardware for realizing sound wave/digital signal conversion, and its basic function is to convert the original sound signal from microphone, magnetic tape and optical disk and output it to the sound equipment such as earphone, loudspeaker, loud-speaker and recorder. The technical iteration of the sound card is mainly divided into three interface types of a card type, an integrated type and an external type.
With the rise of smart phones and mobile interconnection technologies, smart phone-based multimedia applications such as live webcasting are developed vigorously, but the hardware architecture based on smart phones is limited and cannot directly provide sound card hardware support for the smart phone-based multimedia applications. To this problem, the prior art proposes external sound card devices suitable for smart phones, such as "mobile phone USB sound card" with the authorization announcement number CN207720396U, and "chinese utility model with the authorization announcement number CN208479712U," a mobile phone live broadcast support with the sound card module integrated on the support handle, "and" chinese utility model with the authorization announcement number CN 207560320U.
The applicant researches the prior art and a plurality of commercially available external sound card devices suitable for smart phones, and finds that the circuit hardware configuration of the external sound card is insufficient, the audio input end and the output end of the external sound card have limited resources, and the requirements of richer live audio environment are difficult to meet.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned not enough of prior art, the utility model provides a multi-functional external cell-phone sound card.
In order to achieve the above purpose, the present invention adopts the following technical solution.
A multifunctional external mobile phone sound card is provided with an internal circuit for processing audio signals and an equipment interface for connecting the internal circuit;
the device interface includes: a microphone input interface for connecting a microphone, a mobile phone audio input/output interface for connecting a mobile phone, an auxiliary sound source input interface for connecting an auxiliary sound source signal, an earphone output interface for connecting an earphone and a linear output interface for outputting an audio signal; the audio input/output interface of the mobile phone is a Bluetooth interface and/or a TRRS connection socket with the thickness of 3.5 mm;
the internal circuit is also provided with a microphone amplifying unit for amplifying a microphone signal of the microphone input interface, and the microphone input interface amplifies the signal of the microphone through the microphone amplifying unit and then transmits the amplified signal to the internal circuit;
the signal of the microphone input interface is output as a dry sound signal from one or more of the mobile phone audio input/output interface, the earphone output interface and the linear output interface after sound effect processing is carried out on the signal by the internal circuit; or after one or more of the audio input/output interface and the auxiliary sound source input interface of the mobile phone is connected with the auxiliary sound source, the signal of the microphone input interface is mixed by the internal circuit, and then the mixed signal is output as a wet sound signal from one or more of the audio input/output interface of the mobile phone, the earphone output interface and the linear output interface.
Compared with the prior art, the beneficial effects of the utility model reside in that: the mobile phone is connected independently and used as an external mobile phone sound card, a plurality of paths of auxiliary sound sources can be connected to be matched with a microphone for inputting, more abundant sound effect processing is achieved, the function of listening to wet and recording the sound is achieved, and the operation setting is visual and simple.
The present invention will be further described with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a bottom view of fig. 1.
Fig. 4 is a schematic block diagram of the present invention.
Fig. 5 is a schematic block diagram of a first embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a first mixing unit according to a first embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a second mixing unit according to a first embodiment of the present invention.
Fig. 8 is a schematic circuit diagram of the first switching unit according to the first embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of the second switching unit according to the first embodiment of the present invention.
Fig. 10 is a schematic circuit diagram of a third switching unit according to a first embodiment of the present invention.
Fig. 11 is a schematic circuit diagram of an audio effect storing and playing unit according to an embodiment of the present invention.
Fig. 12 is a schematic circuit diagram of a first key control unit according to a first embodiment of the present invention.
Fig. 13 is a schematic circuit diagram of a second key control unit according to a first embodiment of the present invention.
Fig. 14 is a schematic circuit diagram of a battery charging detection unit according to a first embodiment of the present invention.
Fig. 15 is a schematic circuit diagram of a microphone amplification unit according to a first embodiment of the present invention.
Fig. 16 is a schematic circuit diagram of a first digital audio encoding unit according to a first embodiment of the present invention.
Fig. 17 is a schematic circuit diagram of a second digital audio coding unit according to a first embodiment of the present invention.
Fig. 18 is a schematic circuit diagram of a digital audio decoding unit according to a first embodiment of the present invention.
Fig. 19 is a schematic circuit diagram of a DSP audio processing unit according to a first embodiment of the present invention.
Fig. 20 is a schematic block diagram of a second embodiment of the present invention.
Fig. 21 is a schematic block diagram of a third embodiment of the present invention.
Fig. 22 is a schematic block diagram of a fourth embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 4, a multifunctional external mobile phone sound card comprises a main case 1, an internal circuit for processing audio signals is arranged in the main case 1, a control panel 2, an equipment interface and a control switch 3 which are respectively connected with the internal circuit are arranged on the main case 1, a plurality of control key positions 21 are provided on the control panel 2, and a first key control unit 41 for operating the control panel is arranged on the internal circuit;
the device interface includes: a microphone input interface 51 for connecting a microphone, a mobile phone audio input/output interface 52 for connecting a mobile phone, an auxiliary sound source input interface 53 for connecting an auxiliary sound source signal, an earphone output interface 54 for connecting an earphone, and a linear output interface 55 for outputting an audio signal; the audio input/output interface of the mobile phone is a Bluetooth interface and/or a TRRS connection socket with the thickness of 3.5 mm;
the internal circuit is also provided with a microphone amplifying unit 61 for amplifying a microphone signal of the microphone input interface 51, and the microphone input interface 51 amplifies the signal of the microphone through the microphone amplifying unit 61 and then transmits the amplified signal to the internal circuit;
the signal of the microphone input interface 51 is processed by the internal circuit to be output as a dry sound signal from one or more of the mobile phone audio input/output interface 52, the earphone output interface 54 and the linear output interface 55; or after one or more of the handset audio input/output interface 52 and the auxiliary sound source input interface 53 is/are connected to the auxiliary sound source, the signal of the microphone input interface 51 is mixed by the internal circuit, and then the mixed signal is output as a wet sound signal from one or more of the handset audio input/output interface 52, the earphone output interface 54 and the linear output interface 55.
The multifunctional external mobile phone sound card is used by independently connecting the mobile phone through the mobile phone audio input/output interface 52 as an external mobile phone sound card, can be accessed to a plurality of auxiliary sound sources to be matched with a microphone for input, has richer sound effect processing, has the function of listening to wet and recording, and is intuitive and simple in operation and setting.
As an improvement of the above technical solution, the auxiliary sound source input interface 53 includes a linear input interface accessing at least one audio signal as an auxiliary sound source and/or a USB interface accessing a computer audio signal as an auxiliary sound source.
As an improvement of the above technical solution, the internal circuit has at least one DSP audio processing unit 50, the DSP audio processing unit 50 is configured with a digital audio encoding unit 501 connected to the microphone input interface 51, the handset audio input/output interface 52, and the auxiliary sound source input interface 53, the DSP audio processing unit 50 is configured with a digital audio decoding unit 502 connected to the handset audio input/output interface 52, the earphone output interface 54, and the linear output interface 55, and the DSP audio processing unit 50 is configured with a storage unit 503.
Optionally, the microphone input interface 51 exclusively occupies one digital audio coding unit 501, and the mobile phone audio input/output interface 52 and the single auxiliary sound source input interface 53 share one digital audio coding unit 501; the digital audio encoding unit 501 shared by the handset audio input/output interface 52 and the single auxiliary sound source input interface 53 is provided with a first mixing unit 504 connected to the handset audio input/output interface 52 and the single auxiliary sound source input interface 53.
Further, the internal circuit further has a first switching unit 505, a second switching unit 506, a third switching unit 507, and a second mixing unit 508, the first switching unit 505 selects one of the output signals of the mobile phone audio input/output interface 52 to be connected to the first mixing unit 504 or the second mixing unit 508, the second switching unit 506 outputs one of the dry sound signal or the wet sound signal output by the internal circuit to the mobile phone through the mobile phone audio input/output interface 52, the third switching unit 507 is used as a channel switch to transmit the wet sound signal output by the internal circuit to the second mixing unit 508, and the second mixing unit 508 performs mixing processing on the wet sound signal transmitted by the third switching unit 507 and the output signal of the first switching unit 505 and transmits the mixed signal to the earphone output interface 54 and the linear output interface 55.
Furthermore, the internal circuit further has a sound effect storage and playing unit 62 for storing and playing sound effect audio, the control panel operates the second key control unit 42 of the sound effect storage and playing unit 62, and the output of the sound effect storage and playing unit 62 is connected to the first mixing unit 504.
Optionally, the microphone input interface 51 exclusively occupies one digital audio coding unit 501, and the handset audio input/output interface 52 and the multiple auxiliary audio source input interfaces 53 share one digital audio coding unit 501 in groups after being grouped; after the mobile phone audio input/output interface 52 and the plurality of auxiliary sound source input interfaces 53 are grouped, a third sound mixing unit 509 is disposed for mixing the sound sources in the group and accessing the digital audio encoding unit 501 in the group.
Optionally, the mobile phone audio input/output interface, the earphone output interface, and the linear output interface share the same digital audio decoding unit or are respectively and independently configured with the digital audio decoding unit.
To facilitate understanding of the above technical solutions and their improvements, the present invention provides the following embodiments.
[ EXAMPLES one ]
As shown in fig. 1, fig. 2, fig. 3 and fig. 5, in the present embodiment, an internal circuit for processing audio signals is provided in the main casing 1, a control panel 2, a device interface and a control switch 3 are provided on the main casing 1, the control panel 2 is provided with a plurality of control keys 21, and the internal circuit is provided with a first key control unit 41 for operating the control panel;
the control panel is also provided with a plurality of LED lamps 22, and the internal circuit is provided with an LED driving unit 63 for driving the LED lamps 22;
a lithium battery (not shown) for providing working voltage for the internal circuit through the control switch 3 is arranged in the main case 1, a charging interface 12 for connecting an external power supply 120 is provided for the lithium battery in the equipment interface, and the internal circuit is provided with a battery charging detection unit 64 for taking electricity from the charging interface 12 to perform charging and discharging management on the lithium battery;
the device interface includes: a microphone input interface 51 for connecting a microphone 510, a handset audio input/output interface 52 for connecting a handset 520, an auxiliary audio source input interface 53 for connecting an auxiliary audio source signal, an earphone output interface 54 for connecting an earphone 540, and a linear output interface 55 for outputting an audio signal;
the internal circuit is also provided with a microphone amplifying unit 61 for amplifying a microphone signal of the microphone input interface 51, and the microphone input interface 51 amplifies the signal of the microphone through the microphone amplifying unit 61 and then transmits the amplified signal to the internal circuit;
the signal of the microphone input interface 51 is processed by the internal circuit to be output as a dry sound signal from one or more of the mobile phone audio input/output interface 52, the earphone output interface 54 and the linear output interface 55; or after one or more of the handset audio input/output interface 52 and the auxiliary sound source input interface 53 is/are connected to the auxiliary sound source, the signal of the microphone input interface 51 is mixed by the internal circuit, and then the mixed signal is output as a wet sound signal from one or more of the handset audio input/output interface 52, the earphone output interface 54 and the linear output interface 55.
In this embodiment, the auxiliary sound source input interface 53 includes a linear input interface for accessing one audio signal as an auxiliary sound source.
The internal circuit has a DSP audio processing unit 50, the DSP audio processing unit 50 is provided with a digital audio encoding unit connected to the microphone input interface 51, the handset audio input/output interface 52, and the auxiliary sound source input interface 53, the DSP audio processing unit 50 is provided with a digital audio decoding unit 502 connected to the handset audio input/output interface 52, the headphone output interface 54, and the linear output interface 55, and the DSP audio processing unit 50 is provided with a storage unit 503.
The microphone input interface 51 exclusively occupies a digital audio coding unit 501a, and the mobile phone audio input/output interface 52 and the auxiliary sound source input interface 53 share a digital audio coding unit 501 b; the digital audio encoding unit 501b shared by the handset audio input/output interface 52 and the auxiliary audio input interface 53 is configured with a first mixing unit 504 connected to the handset audio input/output interface 52 and the auxiliary audio input interface 53.
The internal circuit further has a first switching unit 505, a second switching unit 506, a third switching unit 507, and a second mixing unit 508, the first switching unit 505 switches one of the output signals of the mobile phone audio input/output interface 52 to the first mixing unit 504 or the second mixing unit 508, the second switching unit 506 outputs one of the dry sound signal or the wet sound signal output by the internal circuit to the mobile phone through the mobile phone audio input/output interface 52, the third switching unit serves as a channel switch to transfer the wet sound signal output by the internal circuit to the second mixing unit 508, and the second mixing unit 508 transfers the wet sound signal transferred by the third switching unit and the output signal of the first switching unit to the earphone output interface 54 and the linear output interface 55 after mixing processing.
The internal circuit also has a sound effect storage and playing unit 62 for storing and playing sound effect audio, a second key control unit 42 for the control panel to operate the sound effect storage and playing unit 62, and the output of the sound effect storage and playing unit 62 is connected to the first mixing unit 504.
In the multifunctional external mobile phone sound card provided by the embodiment, the mobile phone is separately connected through the mobile phone audio input/output interface 52 to be used as an external mobile phone sound card, and a plurality of auxiliary sound sources can be accessed through the auxiliary sound source interface and the audio storage and playing unit 62 to be matched with the microphone for input; the plurality of control keys 21 provided by the control panel 2 perform internal circuit operation through the first key control unit 41 and the second key control unit 42, and call the mutual cooperation of the first switching unit 505, the second switching unit 506, the third switching unit 507, the first sound mixing unit 504, the second sound mixing unit 508 and the third sound mixing unit 509, so that richer sound effects are output, the function of listening to wet and recording dry is realized, and the operation setting is intuitive and simple; and the lithium battery is taken as a power supply, so that the outdoor air conditioning system has ideal cruising performance in outdoor scenes.
As shown in fig. 6 to fig. 19, to facilitate understanding of the implementation process of the above technical solution, the present embodiment provides an exemplary schematic circuit diagram of the first mixing unit 504, the second mixing unit 508, the third mixing unit 509, the first switching unit 505, the second switching unit 506, the third switching unit 507, the audio effect storing and playing unit 62, the first key control unit 41, the second key control unit 42, the battery charging detection unit 64, the microphone amplifying unit 61, the digital audio encoding unit 501a, the digital audio encoding unit 501b, the digital audio decoding unit 502, and the DSP audio processing unit 50.
In this embodiment, the microphone input interface 51 is preferably a 3.5mm TS microphone input socket, the auxiliary sound source input interface 53 is preferably a 3.5mm stereo linear input socket, the earphone output interface 54 is preferably a 3.5mm stereo earphone output socket, the charging interface 12 is preferably a Micro-USB charging socket, the mobile phone audio input/output interface 52 is preferably a 3.5mm TRRS connection socket, and the linear output interface 55 is preferably a 3.5mm stereo linear output socket.
In this embodiment, the sound effect storage and playing unit 62 stores 8 kinds of sound effects including entertainment, laugh, siren, tremble, air horn, clapping and face, and the sound effects are called by the control key 21 on the touch panel in cooperation with the second key control unit 42. The DSP audio processing unit 50 is preset with 9 DSP preset modes including chat effect, popular singing effect, country singing effect, KTV effect, shouting effect, on-site effect, concert hall effect, original sound effect and telephone sound effect, 3 DSP special sound changing effect presets including female sound, male sound and doll sound, and sets dry/wet sound switching control of audio output signals, and the control key 21 on the touch panel is matched with the first key control unit 41 to call the sound effect.
In this embodiment, the DSP audio processing unit 50 is preferably constructed by an integrated circuit with a model number of AD2883, and the DSP audio processing unit 50 processes two paths of audio signals of the input microphone signal and the auxiliary audio source signal, and particularly does not perform audio effect processing on the auxiliary audio source signal, but only performs attenuation control and audio mixing with the microphone signal. The DSP audio processing unit 50 is responsible for performing sound effect processing such as EQ, compression, reverberation, echo, change, and electric sound on the microphone signal, and performing sound mixing and compression processing on the auxiliary sound source signal. The DSP audio processing unit 50, in combination with the battery charging detection unit 64, is also responsible for the charging detection of the lithium battery, and drives the LED lamp 22 to indicate the working status through the LED driving unit 63.
In this embodiment, the storage unit 503 is constructed by an integrated circuit of model PM25LQ010B, and is used for storing a complex audio algorithm and lossless spatial sound effect.
[ example two ]
As shown in fig. 20, in the present embodiment, two microphone input interfaces 51 respectively adapted to a moving coil microphone and a condenser microphone are provided, and a microphone amplification unit 61 for amplifying a microphone signal of the microphone input interface 51 is further provided;
the signal of the microphone input interface 51 is processed by the internal circuit to be output as a dry sound signal from one or more of the mobile phone audio input/output interface 52, the earphone output interface 54 and the linear output interface 55; or after one or more of the handset audio input/output interface 52 and the auxiliary sound source input interface 53 is/are connected to the auxiliary sound source, the signal of the microphone input interface 51 is mixed by the internal circuit, and then the mixed signal is output as a wet sound signal from one or more of the handset audio input/output interface 52, the earphone output interface 54 and the linear output interface 55.
The auxiliary sound source input interface 53 includes a linear input interface for accessing two audio signals as an auxiliary sound source and a USB interface for accessing a computer audio signal as an auxiliary sound source, and two earphone output interfaces 54 are provided.
The internal circuit has a DSP audio processing unit 50, the DSP audio processing unit 50 is provided with a digital audio coding unit connected with a microphone input interface 51, a mobile phone audio input/output interface 52 and an auxiliary sound source input interface 53, and the DSP audio processing unit 50 is provided with a digital audio decoding unit 502 connected with the mobile phone audio input/output interface 52, an earphone output interface 54 and a linear output interface 55.
The microphone input interface 51 exclusively occupies a digital audio coding unit 501 ', and the mobile phone audio input/output interface 52 and the auxiliary audio source input interfaces 53 share one digital audio coding unit 501' according to groups after grouping; after the mobile phone audio input/output interface 52 and the plurality of auxiliary sound source input interfaces 53 are grouped, a third sound mixing unit 509 is disposed for mixing the sound sources in the group and accessing the digital audio encoding unit 501 ″ in the group.
Specifically, the present embodiment employs a DSP audio processing unit 50 constructed by a dual DSP chip.
[ EXAMPLE III ]
As shown in fig. 21, compared with the two embodiments, the DSP audio processing unit 50 constructed by using a single DSP chip is provided with one earphone output interface 54, and the auxiliary audio input interface 53 is also connected to a bluetooth interface for accessing a wireless audio signal as an auxiliary audio source.
[ EXAMPLE IV ]
As shown in fig. 22, in the present embodiment, a chip with a model of i.mx RT1020 is used to construct the DSP audio processing unit 50, and a chip with a model of CS42448 is configured to provide functions of digital audio encoding, digital audio decoding, and signal switching for the DSP audio processing unit 50.
For those skilled in the art, the protection scope of the present invention is not limited to the details of the above-described exemplary embodiments, and all the embodiments with variations within the scope and meaning equivalent to the elements of the present invention should be included in the present invention without departing from the spirit or essential characteristics of the present invention.
Claims (10)
1. A multifunctional external mobile phone sound card is provided with an internal circuit for processing audio signals and an equipment interface for connecting the internal circuit;
characterized in that the device interface comprises: a microphone input interface for connecting a microphone, a mobile phone audio input/output interface for connecting a mobile phone, an auxiliary sound source input interface for connecting an auxiliary sound source signal, an earphone output interface for connecting an earphone and a linear output interface for outputting an audio signal; the audio input/output interface of the mobile phone is a Bluetooth interface and/or a TRRS connection socket with the thickness of 3.5 mm;
the internal circuit is also provided with a microphone amplifying unit for amplifying a microphone signal of the microphone input interface, and the microphone input interface amplifies the signal of the microphone through the microphone amplifying unit and then transmits the amplified signal to the internal circuit;
the signal of the microphone input interface is output as a dry sound signal from one or more of the mobile phone audio input/output interface, the earphone output interface and the linear output interface after sound effect processing is carried out on the signal by the internal circuit; or after one or more of the audio input/output interface and the auxiliary sound source input interface of the mobile phone is connected with the auxiliary sound source, the signal of the microphone input interface is mixed by the internal circuit, and then the mixed signal is output as a wet sound signal from one or more of the audio input/output interface of the mobile phone, the earphone output interface and the linear output interface.
2. The multi-functional external handset sound card of claim 1, wherein the auxiliary sound source input interface comprises a linear input interface for accessing at least one audio signal as an auxiliary sound source and/or a USB interface for accessing a computer audio signal as an auxiliary sound source.
3. The multi-functional external handset sound card according to claim 1, wherein the internal circuit has at least one DSP audio processing unit, the DSP audio processing unit is configured with a digital audio encoding unit connected to the microphone input interface, the handset audio input/output interface, and the auxiliary sound source input interface, the DSP audio processing unit is configured with a digital audio decoding unit connected to the handset audio input/output interface, the earphone output interface, and the linear output interface, and the DSP audio processing unit is configured with a storage unit.
4. The multifunctional external mobile phone sound card according to claim 3, wherein the microphone input interface exclusively occupies one digital audio coding unit, and the mobile phone audio input/output interface and the single auxiliary audio source input interface share one digital audio coding unit; the digital audio coding unit shared by the mobile phone audio input/output interface and the single auxiliary sound source input interface is provided with a first sound mixing unit connected with the mobile phone audio input/output interface and the single auxiliary sound source input interface.
5. The multi-functional external mobile phone sound card according to claim 4, wherein the internal circuit further comprises a first switch unit, a second switch unit, a third switch unit, and a second mixing unit, the first switch unit connects one of the output signals of the audio input/output interface of the mobile phone to the first mixing unit or the second mixing unit, the second switch unit outputs one of the dry sound signal or the wet sound signal output by the internal circuit to the mobile phone through the audio input/output interface of the mobile phone, the third switch unit is used as a channel switch to transmit the wet sound signal output by the internal circuit to the second mixing unit, and the second mixing unit performs mixing processing on the wet sound signal transmitted by the third switch unit and the output signal of the first switch unit and then transmits the wet sound signal to the earphone output interface and the linear output interface.
6. The multi-functional external mobile phone sound card according to claim 4, wherein the internal circuit further comprises a sound effect storage and playing unit for storing and playing sound effect audio, and an output of the sound effect storage and playing unit is connected to the first sound mixing unit.
7. The multi-functional external mobile phone sound card of claim 3, wherein the microphone input interface exclusively occupies one digital audio coding unit, and the mobile phone audio input/output interface and the plurality of auxiliary audio source input interfaces share one digital audio coding unit according to the group after grouping; after the mobile phone audio input/output interface and the plurality of auxiliary sound source input interfaces are grouped, a third sound mixing unit which mixes the sound sources in the group and then accesses the digital audio coding units in the group is respectively configured according to the groups.
8. The multifunctional external handset sound card according to claim 3, wherein the handset audio input/output interface, the headset output interface and the linear output interface share the same digital audio decoding unit or are respectively and independently configured with the digital audio decoding unit.
9. The multifunctional external mobile phone sound card as claimed in claim 1, further comprising a plurality of LED lamps, wherein the internal circuit comprises an LED driving unit for driving the LED lamps.
10. The multifunctional external mobile phone sound card according to claim 1, wherein a lithium battery is configured to provide operating voltage for the internal circuit through the control switch, a charging interface is provided for the lithium battery in the device interface, and the internal circuit is configured with a battery charging detection unit for taking power from the charging interface to perform charging and discharging management on the lithium battery.
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