Recording sound card equipment with functions of switching monaural and stereo modes and recording

Abstract

The utility model discloses recording sound card equipment with functions of switching monaural and stereophonic modes and recording. The recording sound card equipment comprises a plurality of functional modules, the sound channel mode change-over switch circuit is connected with the left sound channel input signal processing module and the right sound channel input signal processing module; when a monaural mode is selected, the sound channel mode change-over switch circuit is connected with the left and right sound channel composite processing circuit; when a stereo mode is selected, the sound channel mode change-over switch circuit is connected with the left sound channel signal output circuit and the right sound channel signal output circuit. The microphone sound monitoring switch circuit is connected with the left and right sound channel composite processing circuit, the left sound channel signal output circuit, the right sound channel signal output circuit and the output signal processing module; the recording and sound mixing circuit is connected with the left and right sound channel composite processing circuit, the left sound channel signal output circuit, the right sound channel signal output circuit and the internal recording processing module; and the internal recording processing module is connected with the output signal processing module and the power supply processing module. According to the utility model, the sound channel mode and the internal recording function can be switched.

Description

Technical Field

[0001] The utility model relates to the technical field of sound cards, in particular to a recording sound card device with the function of switching between mono and stereo modes and internal recording. Background Art

[0002] The recording sound cards on the market only support stereo recording mode for stereo recording. Stereo recording means using two channels to record sound, which can simulate the human binaural effect and provide a richer sense of space and direction. If the stereo recording is played on a stereo device (such as stereo speakers, headphones, etc.), the sound of the two channels will be sent to the left and right speakers or headphones respectively, thus achieving a stereo effect. Users may also need to use mono recording mode for mono recording according to different needs. However, there is no switching function between stereo recording mode and mono recording mode on the sound cards on the market. If you need to switch stereo recording to mono recording on a sound card that only supports stereo recording, you need to use professional audio host rack software to set the audio track. The operation is relatively complicated, and professional recording software requires copyright fees, which is costly to use.

[0003] Most recording sound cards on the market lack internal recording capabilities and can only record dry sound. Users who want to simultaneously record their own microphone and musical accompaniment cannot do so directly using the sound card. They must first record their own voice, then edit the audio using professional audio host software. Mixing the recorded vocals and accompaniment audio together through tracks creates a composite audio track with the vocals and accompaniment in sync. This operation is complex and technically challenging, requiring high user experience. Furthermore, professional audio host software often charges copyright fees, making it expensive to use. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a recording sound card device with a switchable mono and stereo mode and an internal recording function.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is as follows: a recording sound card device with a switchable mono and stereo mode and an internal recording function, the recording sound card device includes a channel mode switching and internal recording control system, the channel mode switching and internal recording control system includes a left channel input signal processing module, a right channel input signal processing module, a channel mode switching switch circuit, a left and right channel composite processing circuit, a left channel signal output circuit, a right channel signal output circuit, a microphone sound monitoring switch circuit, an output signal processing module, a recording mixing circuit, an internal recording processing module and a power supply processing module;

[0006] The channel mode switching switch circuit has a common end, a first switching end, and a second switching end. The common end of the channel mode switching switch circuit is respectively connected to the left channel input signal processing module and the right channel input signal processing module; when the mono recording mode is selected, the first switching end of the channel mode switching switch circuit is connected to the left and right channel composite processing circuit, and the second switching end of the channel mode switching switch circuit is disconnected; when the stereo recording mode is selected, the second switching end of the channel mode switching switch circuit is respectively connected to the left channel signal output circuit and the right channel signal output circuit, and the first switching end of the channel mode switching switch circuit is disconnected; the microphone sound monitoring switch circuit is respectively connected to the left and right channel composite processing circuit, the left channel signal output circuit, the right channel signal output circuit, and the output signal processing module; the recording mixing circuit is respectively connected to the left and right channel composite processing circuit, the left channel signal output circuit, the right channel signal output circuit, and the internal recording processing module; the internal recording processing module is respectively connected to the output signal processing module and the power supply processing module.

[0007] Furthermore, the left channel input signal processing module includes a left channel signal input circuit, a first switching switch circuit, a first microphone processing circuit, a first musical instrument processing circuit, a first analog volume adjustment knob circuit, a first operational amplifier circuit and a first differential comparison circuit. The first switching switch circuit has a common end, a first switching end and a second switching end. The common end of the first switching switch circuit is connected to the left channel signal input circuit. When microphone processing is selected, the first switching end of the first switching switch circuit is connected to the first microphone processing circuit, and the second switching end of the first switching switch circuit is disconnected; when musical instrument processing is selected, the second switching end of the first switching switch circuit is connected to the first musical instrument processing circuit, and the first switching end of the first switching switch circuit is disconnected; the first analog volume adjustment knob circuit is respectively connected to the first microphone processing circuit, the first musical instrument processing circuit and the first operational amplifier circuit, and the first differential comparison circuit is respectively connected to the common end of the first operational amplifier circuit and the channel mode switching switch circuit;

[0008] The right channel input signal processing module includes a right channel signal input circuit, a second switching switch circuit, a second microphone processing circuit, a second musical instrument processing circuit, a second analog volume adjustment knob circuit, a second operational amplifier circuit and a second differential comparison circuit. The second switching switch circuit has a common end, a first switching end and a second switching end. The common end of the second switching switch circuit is connected to the right channel signal input circuit. When microphone processing is selected, the first switching end of the second switching switch circuit is connected to the second microphone processing circuit, and the second switching end of the second switching switch circuit is disconnected; when musical instrument processing is selected, the second switching end of the second switching switch circuit is connected to the second musical instrument processing circuit, and the first switching end of the second switching switch circuit is disconnected; the second analog volume adjustment knob circuit is respectively connected to the second microphone processing circuit, the second musical instrument processing circuit and the second operational amplifier circuit, and the second differential comparison circuit is respectively connected to the common end of the second operational amplifier circuit and the channel mode switching switch circuit.

[0009] Furthermore, the output signal processing module includes an output mixing circuit, a third operational amplifier circuit, a digital volume adjustment knob circuit, an earphone amplifier circuit, an earphone output circuit, a third analog volume adjustment knob circuit, a fourth operational amplifier circuit and a speaker output circuit; the output mixing circuit is respectively connected to the microphone sound monitoring switch circuit, the internal recording processing module, the third operational amplifier circuit and the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit is respectively connected to the third operational amplifier circuit and the earphone amplifier circuit, and the earphone amplifier circuit is connected to the earphone output circuit; the fourth operational amplifier circuit is respectively connected to the third analog volume adjustment knob circuit and the speaker output circuit.

[0010] Furthermore, the internal recording processing module includes an internal playback switch control circuit, a fifth operational amplifier circuit, a DSP audio decoding processing circuit and a data transmission interface circuit. The fifth operational amplifier circuit is respectively connected to the output mixing circuit, the internal playback switch control circuit and the DSP audio decoding processing circuit. The internal playback switch control circuit and the DSP audio decoding processing circuit are both connected to the recording mixing circuit. The DSP audio decoding processing circuit is respectively connected to the data transmission interface circuit and the power supply processing module.

[0011] Furthermore, the power supply processing module includes a power supply circuit, a voltage stabilizing circuit and a power switch circuit. The power supply circuit is connected to the power switch circuit and the voltage stabilizing circuit respectively. The voltage stabilizing circuit is connected to the DSP audio decoding processing circuit, and the power switch circuit is connected to the data transmission interface circuit.

[0012] Furthermore, the channel mode switching and internal recording control system also includes a lighting processing module, which includes a left channel signal level acquisition circuit, a right channel signal level acquisition circuit, a lighting control circuit and multiple groups of RGB lamp beads. The lighting control circuit is respectively connected to the left channel signal level acquisition circuit, the right channel signal level acquisition circuit, the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit, the power switch circuit and multiple groups of RGB lamp beads. The left channel signal level acquisition circuit is connected to the first differential comparison circuit, and the right channel signal level acquisition circuit is connected to the second differential comparison circuit.

[0013] Furthermore, the recording sound card device also includes a housing, the housing being formed by connecting an upper panel, a lower panel, a left panel, a right panel, a front panel, and a rear panel; a first circuit board and a second circuit board are installed in the housing, the first circuit board is installed on the lower panel, and the second circuit board is installed on the front end of the upper panel;

[0014] The left channel signal input circuit, the first microphone processing circuit, the first musical instrument processing circuit, the first operational amplifier circuit, the first differential comparison circuit, the right channel signal input circuit, the second microphone processing circuit, the second musical instrument processing circuit, the second operational amplifier circuit, the second differential comparison circuit, the output mixing circuit, the third operational amplifier circuit, the headphone amplifier circuit, the headphone output circuit, the fourth operational amplifier circuit, the speaker output circuit, the fifth operational amplifier circuit, the DSP audio decoding processing circuit, the data transmission interface circuit, the power supply circuit, the voltage stabilizing circuit, the power switch circuit, the left channel signal level acquisition circuit and the right channel signal level acquisition circuit are all installed on the first circuit board;

[0015] The first switching switch circuit, the second switching switch circuit, the channel mode switching switch circuit, the microphone sound monitoring switch circuit, the built-in switch control circuit, the first analog volume adjustment knob circuit, the second analog volume adjustment knob circuit, the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit, the lighting control circuit and multiple groups of RGB lamp beads are installed on the second circuit board.

[0016] Furthermore, the front end of the upper panel is an operation interface area, on which a first button switch, a second button switch, a third button switch, a fourth button switch, a fifth button switch, a first rotary switch, a second rotary switch, a third rotary switch and a fourth rotary switch are provided. The first button switch is connected to the first switching switch circuit, the second button switch is connected to the second switching switch circuit, the third button switch is connected to the built-in switch control circuit, the fourth button switch is connected to the channel mode switching switch circuit, the fifth button switch is connected to the microphone sound monitoring switch circuit, the first rotary switch is connected to the first analog volume adjustment knob circuit, the second rotary switch is connected to the second analog volume adjustment knob circuit, the third rotary switch is connected to the third analog volume adjustment knob circuit, and the fourth rotary switch is connected to the digital volume adjustment knob circuit; light-transmitting areas are provided around the first, second, third and fourth rotary switches and around the operation interface area, and each of the light-transmitting areas corresponds one-to-one to the position of a group of RGB lamp beads;

[0017] The front panel is provided with a left channel input interface, a right channel input interface, two speaker output interfaces and a headphone output interface, the left channel input interface is connected to the left channel signal input circuit, the right channel input interface is connected to the right channel signal input circuit, the speaker output interface is connected to the speaker output circuit, and the headphone output interface is connected to the headphone output circuit;

[0018] The rear panel is provided with a power switch and a data transmission interface. The power switch is connected to the power switch circuit, and the data transmission interface is connected to the data transmission interface circuit.

[0019] Furthermore, the operation interface area is an inclined surface, and the second circuit board is arranged opposite to the inclined surface.

[0020] Furthermore, a plurality of anti-slip pads are installed on the bottom of the lower panel.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] 1. The channel mode switching circuit is used to switch between mono recording mode and stereo recording mode, which is simple and convenient. When the mono recording mode is selected, the channel mode switching circuit is switched to connect with the left and right channel composite processing circuit to realize the composite output of the left and right channel input signals, that is, the left channel output signal is the same as the left and right channel input signals, and the right channel output signal is the same as the left and right channel input signals; when the stereo recording mode is selected, the channel mode switching circuit is switched to connect with the left channel signal output circuit and the right channel signal output circuit, so that the left channel output signal is the same as the left channel input signal, and the right channel output signal is the same as the right channel input signal.

[0023] 2. The first circuit board is equipped with a multi-stage operational amplifier circuit and a differential comparator circuit. After receiving the audio accompaniment signal input from the computer or an external music player, the input signal is combined with the microphone signal through the internal amplifier switch control circuit. After multi-stage amplification, it enters the DSP audio decoding processing circuit for processing and then uploads to the computer, completing the simultaneous recording of human voice and accompaniment, which is simple and convenient.

[0024] 3. No need for professional audio host rack software, but through hardware circuits, you can switch between mono and stereo recording modes and record accompaniment and microphone vocals at the same time. The hardware circuit cleverly realizes a simple and convenient one-button switching function without additional payment and low cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of a channel mode switching and internal recording control system in a recording sound card device with switching between mono and stereo modes and internal recording functions provided by an embodiment of the present utility model.

[0027] Figure 2 This is one of the stereoscopic diagrams of a recording sound card device with switchable mono and stereo modes and internal recording function provided by an embodiment of the present utility model.

[0028] Figure 3 This is the second stereoscopic diagram of a recording sound card device with switchable mono and stereo modes and internal recording function provided by an embodiment of the present invention.

[0029] Figure 4 yes Figure 2 Top view of .

[0030] Figure 5 yes Figure 4 Cross-sectional view in the AA direction.

[0031] Figure 6 This is a structural diagram of RGB lamp beads on the second circuit board provided by an embodiment of the present utility model.

[0032] Description of the numbers in the figure:

[0033] 100-channel mode switching and internal recording control system, 1-left channel input signal processing module, 101-left channel signal input circuit, 102-first switching circuit, 103-first microphone processing circuit, 104-first musical instrument processing circuit, 105-first analog volume adjustment knob circuit, 106-first operational amplifier circuit, 107-first differential comparison circuit, 2-right channel input signal processing module, 201-right channel signal input circuit, 202-second switching circuit, 203-second microphone processing circuit, 204-second musical instrument processing circuit, 205-second analog volume adjustment Knob circuit, 206-second operational amplifier circuit, 207-second differential comparison circuit, 3-channel mode switching circuit, 4-left and right channel composite processing circuit, 5-left channel signal output circuit, 6-right channel signal output circuit, 7-output signal processing module, 701-output mixing circuit, 702-third operational amplifier circuit, 703-digital volume adjustment knob circuit, 704-headphone amplifier circuit, 705-headphone output circuit, 706-third analog volume adjustment knob circuit, 707-fourth operational amplifier circuit, 708-speaker output circuit, 8-internal recording processing module, 801-internal amplifier switch control Control circuit, 802-fifth operational amplifier circuit, 803-DSP audio decoding processing circuit, 804-data transmission interface circuit, 9-power supply processing module, 901-power supply circuit, 902-voltage stabilization circuit, 903-power switch circuit, 10-microphone sound monitoring switch circuit, 11-recording mixing circuit, 12-lighting processing module, 121-left channel signal level acquisition circuit, 122-right channel signal level acquisition circuit, 123-lighting control circuit, 124-RGB lamp beads, 13-housing, 131-upper panel, 1311-bevel, 132-lower panel, 133-left Board, 134-right panel, 135-front panel, 136-rear panel, 14-first circuit board, 15-second circuit board, 16-first button switch 17-, second button switch, 18-third button switch, 19-fourth button switch, 20-fifth button switch, 21-first knob switch, 22-second knob switch, 23-third knob switch, 24-fourth knob switch, 25-left channel input interface, 26-right channel input interface, 27-two speaker output interfaces, 28-headphone output interface, 29-power switch, 30-data transmission interface, 31-anti-slip foot pad, 32-light-transmitting area. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be noted that the following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Similarly, the following examples are merely partial embodiments of the present invention and are not intended to be exhaustive. All other embodiments derived by persons of ordinary skill in the art without inventive effort are intended to fall within the scope of protection of the present invention.

[0035] See Figures 1 to 6 The present invention provides a recording sound card device with a mono and stereo mode switch and internal recording function. The recording sound card device includes a channel mode switching and internal recording control system 100. The channel mode switching and internal recording control system 100 includes a left channel input signal processing module 1, a right channel input signal processing module 2, a channel mode switching switch circuit 3, a left and right channel composite processing circuit 4, a left channel signal output circuit 5, a right channel signal output circuit 6, an output signal processing module 7, an internal recording processing module 8, a power supply processing module 9, a microphone sound monitoring switch circuit 10, and a recording mixing circuit 11.

[0036] The channel mode switching circuit 3 has a common end, a first switching end, and a second switching end. The common end of the channel mode switching circuit 3 is connected to the left channel input signal processing module 1 and the right channel input signal processing module 2 respectively. When the mono recording mode is selected, the first switching end of the channel mode switching circuit 3 is connected to the left and right channel composite processing circuit 4, and the second switching end of the channel mode switching circuit 3 is disconnected. When the stereo recording mode is selected, the second switching end of the channel mode switching circuit 4 is connected to the left channel signal output circuit 5 and the right channel signal output circuit 6 respectively, and the first switching end of the channel mode switching circuit 3 is disconnected. The microphone sound monitoring switch circuit 10 is connected to the left and right channel composite processing circuit 4, the left channel signal output circuit 5, the right channel signal output circuit 6, and the output signal processing module 7 respectively. The recording mixing circuit 11 is connected to the left and right channel composite processing circuit 4, the left channel signal output circuit 5, the right channel signal output circuit 6, and the internal recording processing module 8 respectively. The internal recording processing module 8 is connected to the output signal processing module 7 and the power supply processing module 9 respectively. Channel mode switching circuit 3 enables switching between mono recording mode and stereo recording mode, which is simple and convenient. When mono recording mode is selected, channel mode switching circuit 3 switches to connect to left and right channel composite processing circuit 4, achieving composite output of the left and right channel input signals, i.e., the left channel output signal is identical to the left and right channel input signals, and the right channel output signal is identical to the left and right channel input signals. When stereo recording mode is selected, channel mode switching circuit 3 switches to connect to left channel signal output circuit 5 and right channel signal output circuit 6, achieving the left channel output signal being identical to the left channel input signal, and the right channel output signal being identical to the right channel input signal.

[0037] The input signal is combined with the microphone signal through the recording mixing circuit 11 and the internal recording processing module 8, and after multi-stage amplification, it enters the DSP audio decoding processing circuit for processing and is uploaded to the computer, completing the simultaneous recording of human voice and accompaniment, which is simple and convenient.

[0038] In this embodiment, the left channel input signal processing module 1 includes a left channel signal input circuit 101, a first switching switch circuit 102, a first microphone processing circuit 103, a first musical instrument processing circuit 104, a first analog volume adjustment knob circuit 105, a first operational amplifier circuit 106 and a first differential comparison circuit 107. The first switching switch circuit 102 has a common end, a first switching end and a second switching end. The common end of the first switching switch circuit 102 is connected to the left channel signal input circuit 101. When microphone processing is selected, the first switching end of the first switching switch circuit 102 is connected to the first microphone processing circuit 103. When the first analog volume adjustment knob circuit 105 is connected to the first microphone processing circuit 103, the first musical instrument processing circuit 104 and the first operational amplifier circuit 106, the first differential comparison circuit 107 is connected to the common end of the first operational amplifier circuit 106 and the channel mode switching switch circuit 3. Amplifying and differentially comparing the input signal can reduce signal interference.

[0039] The right channel input signal processing module 2 includes a right channel signal input circuit 201, a second switching switch circuit 202, a second microphone processing circuit 203, a second musical instrument processing circuit 204, a second analog volume adjustment knob circuit 205, a second operational amplifier circuit 206 and a second differential comparison circuit 207. The second switching switch circuit 202 has a common end, a first switching end and a second switching end. The common end of the second switching switch circuit 202 is connected to the right channel signal input circuit 201. When microphone processing is selected, the first switching end of the second switching switch circuit 202 is connected to the second microphone processing circuit 203. The second switching end of the second switching switch circuit 202 is disconnected; when instrument processing is selected, the second switching end of the second switching switch circuit 202 is connected to the second instrument processing circuit 204, and the first switching end of the second switching switch circuit 202 is disconnected; the second analog volume adjustment knob circuit 205 is respectively connected to the second microphone processing circuit 203, the second instrument processing circuit 204 and the second operational amplifier circuit 206, and the second differential comparison circuit 207 is respectively connected to the second operational amplifier circuit 206 and the common end of the channel mode switching switch circuit 3; amplifying and differentially comparing the input signal can reduce signal interference.

[0040] In this embodiment, the output signal processing module 7 includes an output mixing circuit 701, a third operational amplifier circuit 702, a digital volume adjustment knob circuit 703, an earphone amplifier circuit 704, an earphone output circuit 705, a third analog volume adjustment knob circuit 706, a fourth operational amplifier circuit 707, and a speaker output circuit 708. The output mixing circuit 701 is respectively connected to the microphone sound monitoring switch circuit 10, the internal recording processing module 8, the third operational amplifier circuit 702, and the third analog volume adjustment knob circuit 706. The digital volume adjustment knob circuit 703 is respectively connected to the third operational amplifier circuit 702 and the earphone amplifier circuit 704, and the earphone amplifier circuit 704 is connected to the earphone output circuit 705. The fourth operational amplifier circuit 707 is respectively connected to the third analog volume adjustment knob circuit 706 and the speaker output circuit 708. The composite signal in the mono recording mode or the left and right channel output signals in the stereo recording mode are output to the earphone and speaker via the output signal processing module 7 to obtain the effect in the corresponding recording mode.

[0041] In this embodiment, the internal recording processing module 8 includes an internal amplifier switch control circuit 801, a fifth operational amplifier circuit 802, a DSP audio decoding processing circuit 803, and a data transmission interface circuit 804. The fifth operational amplifier circuit 802 is respectively connected to the output mixing circuit 701, the internal amplifier switch control circuit 801, and the DSP audio decoding processing circuit 803. The internal amplifier switch control circuit 801 and the DSP audio decoding processing circuit 803 are both connected to the recording mixing circuit 11. The DSP audio decoding processing circuit 803 is respectively connected to the data transmission interface circuit 804 and the power supply processing module 9. The internal recording processing module 8 can realize simultaneous recording of human voice and accompaniment.

[0042] In this embodiment, the power supply processing module 9 includes a power supply circuit 901, a voltage stabilizing circuit 902 and a power switch circuit 903. The power supply circuit 901 is connected to the power switch circuit 903 and the voltage stabilizing circuit 902 respectively. The voltage stabilizing circuit 902 is connected to the DSP audio decoding processing circuit 803, and the power switch circuit 903 is connected to the data transmission interface circuit 804.

[0043] In this embodiment, the channel mode switching and internal recording control system 100 further includes a lighting processing module 12, which includes a left channel signal level acquisition circuit 121, a right channel signal level acquisition circuit 122, a lighting control circuit 123, and multiple groups of RGB lamp beads 124. The lighting control circuit 123 is respectively connected to the left channel signal level acquisition circuit 121, the right channel signal level acquisition circuit 122, the third analog volume adjustment knob circuit 706, the digital volume adjustment knob circuit 703, the power switch circuit 903, and the multiple groups of RGB lamp beads 124. The left channel signal level acquisition circuit 121 is connected to the first differential comparison circuit 107, and the right channel signal level acquisition circuit 122 is connected to the second differential comparison circuit 207. The lighting control circuit 123 collects and processes the signals corresponding to the first analog volume adjustment knob circuit 105, the second analog volume adjustment knob circuit 205, the third analog volume adjustment knob circuit 706 and the digital volume adjustment knob circuit 703, and then realizes different lighting effects through multiple groups of RGB lamp beads 124, so that users can intuitively see the volume level and adjust it easily.

[0044] In this embodiment, the recording sound card device further includes a housing 13, which is formed by connecting an upper panel 131, a lower panel 132, a left panel 133, a right panel 134, a front panel 135, and a rear panel 136. A first circuit board 14 and a second circuit board 15 are mounted within the housing 13. The first circuit board 14 is a main circuit board. The first circuit board 14 is mounted on the lower panel 132 and secured with ordinary machine screws. The second circuit board 15 is mounted on the front end of the upper panel 131 and secured with self-tapping screws. The first circuit board 14 and the second circuit board 15 are connected by a signal cable. The rear end of the upper panel 131 is made of ABS plastic, the front end of the upper panel 131 is made of acrylic, and the lower panel 132, left panel 133, right panel 134, front panel 135, and rear panel 136 are made of sheet metal. The specific material can also be customized according to user needs. The upper panel 131 , the lower panel 132 , the left panel 133 , the right panel 134 , the front panel 135 and the rear panel 136 are fixed directly by buckles or screws.

[0045] The left channel signal input circuit 101, the first microphone processing circuit 103, the first musical instrument processing circuit 104, the first operational amplifier circuit 106, the first differential comparison circuit 107, the right channel signal input circuit 201, the second microphone processing circuit 203, the second musical instrument processing circuit 204, the second operational amplifier circuit 206, the second differential comparison circuit 207, the output mixing circuit 701, the third operational amplifier circuit 702, the headphone amplifier circuit 704, the headphone output circuit 705, the fourth operational amplifier circuit 707, the speaker output circuit 708, the fifth operational amplifier circuit 802, the DSP audio decoding processing circuit 803, the data transmission interface circuit 804, the power supply circuit 901, the voltage stabilizing circuit 902, the power switch circuit 903, the left channel signal level acquisition circuit 121 and the right channel signal level acquisition circuit 122 are all mounted on the first circuit board 14;

[0046] The first switching switch circuit 102, the second switching switch circuit 202, the channel mode switching switch circuit 3, the microphone sound monitoring switch circuit 10, the built-in switch control circuit 801, the first analog volume adjustment knob circuit 105, the second analog volume adjustment knob circuit 205, the third analog volume adjustment knob circuit 706, the digital volume adjustment knob circuit 703, the lighting control circuit 123 and multiple groups of RGB lamp beads 124 are installed on the second circuit board 15.

[0047] In this embodiment, the front end of the upper panel 131 is an operation interface area, and the operation interface area is provided with a first button switch 16, a second button switch 17, a third button switch 18, a fourth button switch 19, a fifth button switch 20, a first knob switch 21, a second knob switch 22, a third knob switch 23 and a fourth knob switch 24. The first button switch 16 is connected to the first switching switch circuit 102, the second button switch 17 is connected to the second switching switch circuit 202, the third button switch 18 is connected to the built-in switch control circuit 801, the fourth button switch 19 is connected to the channel mode switching switch circuit 3, and the fifth button switch 20 is connected to the microphone sound monitoring switch The first rotary switch 21 is connected to the first analog volume adjustment knob circuit 105, the second rotary switch 22 is connected to the second analog volume adjustment knob circuit 205, the third rotary switch 23 is connected to the third analog volume adjustment knob circuit 706, and the fourth rotary switch 24 is connected to the digital volume adjustment knob circuit 703; the first rotary switch 21, the second rotary switch 22, the third rotary switch 23, the fourth rotary switch 24 and the operation interface area are all provided with a light-transmitting area 32, each of the light-transmitting areas 32 corresponds to the position of a group of RGB lamp beads 124; when the first rotary switch 21 is operated, the light processing module 12 transmits the left channel signal to the left channel signal. The level acquisition circuit 121 acquires the signal of the first analog volume adjustment knob circuit 105, and controls a group of RGB lamp beads 124 corresponding to the position of the first knob switch 21 to emit light, and transmit light from the light-transmitting area 32 located around the first knob switch 21; when the second knob switch 22 is operated, the light processing module 12 acquires the signal of the second analog volume adjustment knob circuit 205 through the right channel signal level acquisition circuit 221, and controls a group of RGB lamp beads 124 corresponding to the position of the second knob switch 22 to emit light, and transmit light from the light-transmitting area 32 located around the second knob switch 22; when the third knob switch 23 is operated, the light processing module 12 acquires the signal of the third analog volume adjustment knob circuit 706 The RGB lamp beads 124 corresponding to the position of the third rotary switch 23 emit light from the light-transmitting area 32 surrounding the third rotary switch 23. When the fourth rotary switch 24 is operated, the lighting processing module 12 collects the signal from the digital volume adjustment knob circuit 703 and controls the RGB lamp beads 124 corresponding to the position of the fourth rotary switch 24 to emit light from the light-transmitting area 32 surrounding the fourth rotary switch 24. When the power switch 29 is operated, the lighting processing module 12 collects the signal from the power switch circuit 903 and controls the RGB lamp beads 124 corresponding to the periphery of the operation interface area to emit light from the light-transmitting area 32 surrounding the operation interface area. This allows for different lighting effects to be achieved.

[0048] The first button switch 16 , the second button switch 17 , the third button switch 18 , the fourth button switch 19 , the fifth button switch 20 , the first knob switch 21 , the second knob switch 22 , the third knob switch 23 and the fourth knob switch 24 are all made of aluminum alloy.

[0049] The front panel 135 is provided with a left channel input interface 25, a right channel input interface 26, two speaker output interfaces 27 and a headphone output interface 28. The left channel input interface 25 is connected to the left channel signal input circuit 101, the right channel input interface 26 is connected to the right channel signal input circuit 201, the speaker output interface 27 is connected to the speaker output circuit 708, and the headphone output interface 28 is connected to the headphone output circuit 705;

[0050] The rear panel 136 is provided with a power switch 29 and a data transmission interface 30 . The power switch 29 is connected to the power switch circuit 903 , and the data transmission interface 30 is connected to the data transmission interface circuit 804 .

[0051] In this embodiment, the operation interface area is an inclined surface 1311 , the second circuit board 15 is arranged opposite to the inclined surface 1311 , and the front end of the upper panel 131 is the inclined surface 1311 , which makes it more convenient to operate the interface.

[0052] In this embodiment, a plurality of anti-skid pads 31 are installed at the bottom of the lower panel 132 to prevent slipping.

[0053] The working principle of this utility model is as follows:

[0054] The microphone signal enters the sound card from the left channel input interface 25 and / or the right channel input interface 26. The microphone signal entering from the left channel input interface 25 is selected by the first switching circuit 102 to enter the first microphone processing circuit 103 or the first instrument processing circuit 104 for processing, and then is adjusted by the first analog volume adjustment knob circuit 105 for gain adjustment and amplified by the first operational amplifier circuit 106. Then, after being processed by the first differential comparator circuit 107, one end enters the lighting control circuit 123 through the left channel signal level acquisition circuit 121, and the other end enters the lighting control circuit 123 through the left channel signal level acquisition circuit 121. The common terminal of the channel mode switching circuit 3; for the microphone signal entering from the right channel input interface 26, after being selected by the second switching circuit 202 to enter the second microphone processing circuit 203 or the second musical instrument processing circuit 204 for processing, it is then adjusted by the second analog volume adjustment knob circuit 205 for gain adjustment and amplified by the second operational amplifier circuit 206, and then processed by the second differential comparator circuit 207. One end enters the lighting control circuit 123 through the right channel signal level acquisition circuit 122, and the other end passes through the common terminal of the channel mode switching circuit 3;

[0055] When the mono recording mode is selected, the channel mode switching circuit 3 is switched to connect to the left and right channel composite processing circuit 4, so that the left and right channel input signals are composited and output. That is, the left channel output signal is the same as the left and right channel input signals, and the right channel output signal is the same as the left and right channel input signals. When the stereo recording mode is selected, the channel mode switching circuit 3 is switched to connect to the left channel signal output circuit 5 and the right channel signal output circuit 6, so that the left channel output signal is the same as the left channel input signal, and the right channel output signal is the same as the right channel input signal. The output signal enters the output mixing circuit 701 through the microphone sound monitoring switch circuit 10, and is then connected to the speaker output circuit and the headphone output circuit respectively. The composite signal is output to the playback device through the speaker output interface 27 and the headphone output interface 28.

[0056] The signals corresponding to the left and right channel composite processing circuit 4, the left channel signal output circuit 5 and the right channel signal output circuit 6 are also output to the recording mixing circuit 11. After audio processing by the DSP audio decoding processing circuit 803, they are uploaded to the computer through the data transmission interface 30 (such as: TYPE-C interface) for sound recording and storage, realizing the one-key conversion function of the input signal mono and stereo recording modes through the channel mode switching circuit 3, and the monitoring function through the microphone sound monitoring switch circuit 10.

[0057] The microphone signal enters the sound card from the left channel input interface 25 and / or the right channel input interface 26, and is gain-adjusted by the first analog volume adjustment knob circuit 105 and the second analog volume adjustment knob circuit 205, and amplified by the first operational amplifier circuit 106 and the second operational amplifier circuit 206. The digital audio signal from the computer is transmitted to the DSP audio decoding processing circuit 803 through the data transmission interface 30 (such as: TYPE-C interface). After the DSP audio decoding processing circuit 803 completes the analysis, it converts the digital signal into an analog signal and outputs it, and amplifies the analog signal through the fifth operational amplifier circuit 802. Then, the signal path processed by the microphone input loop and the analog signal path processed by the fifth operational amplifier circuit 802 from the computer are connected together through the internal amplifier switch control circuit 801 to form a combined path, namely the recording mixing circuit 11. The mixed signal is then output to the DSP audio decoding processing circuit 803 for audio processing and uploaded to the computer, realizing the simultaneous recording function of the microphone human voice and the computer music accompaniment.

[0058] The above description is only part of the embodiments of the present invention and does not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A recording sound card device with a switchable mono and stereo mode and an internal recording function, characterized in that: The recording sound card device includes a channel mode switching and internal recording control system, which includes a left channel input signal processing module, a right channel input signal processing module, a channel mode switching switch circuit, a left and right channel composite processing circuit, a left channel signal output circuit, a right channel signal output circuit, a microphone sound monitoring switch circuit, an output signal processing module, a recording mixing circuit, an internal recording processing module and a power supply processing module; The channel mode switching switch circuit has a common end, a first switching end, and a second switching end. The common end of the channel mode switching switch circuit is respectively connected to the left channel input signal processing module and the right channel input signal processing module; when the mono recording mode is selected, the first switching end of the channel mode switching switch circuit is connected to the left and right channel composite processing circuit, and the second switching end of the channel mode switching switch circuit is disconnected; when the stereo recording mode is selected, the second switching end of the channel mode switching switch circuit is respectively connected to the left channel signal output circuit and the right channel signal output circuit, and the first switching end of the channel mode switching switch circuit is disconnected; the microphone sound monitoring switch circuit is respectively connected to the left and right channel composite processing circuit, the left channel signal output circuit, the right channel signal output circuit, and the output signal processing module; the recording mixing circuit is respectively connected to the left and right channel composite processing circuit, the left channel signal output circuit, the right channel signal output circuit, and the internal recording processing module; the internal recording processing module is respectively connected to the output signal processing module and the power supply processing module.

2. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 1, characterized in that: The left channel input signal processing module includes a left channel signal input circuit, a first switching switch circuit, a first microphone processing circuit, a first musical instrument processing circuit, a first analog volume adjustment knob circuit, a first operational amplifier circuit and a first differential comparison circuit. The first switching switch circuit has a common end, a first switching end and a second switching end. The common end of the first switching switch circuit is connected to the left channel signal input circuit. When microphone processing is selected, the first switching end of the first switching switch circuit is connected to the first microphone processing circuit, and the second switching end of the first switching switch circuit is disconnected; when musical instrument processing is selected, the second switching end of the first switching switch circuit is connected to the first musical instrument processing circuit, and the first switching end of the first switching switch circuit is disconnected; the first analog volume adjustment knob circuit is respectively connected to the first microphone processing circuit, the first musical instrument processing circuit and the first operational amplifier circuit, and the first differential comparison circuit is respectively connected to the common end of the first operational amplifier circuit and the channel mode switching switch circuit; The right channel input signal processing module includes a right channel signal input circuit, a second switching switch circuit, a second microphone processing circuit, a second musical instrument processing circuit, a second analog volume adjustment knob circuit, a second operational amplifier circuit and a second differential comparison circuit. The second switching switch circuit has a common end, a first switching end and a second switching end. The common end of the second switching switch circuit is connected to the right channel signal input circuit. When microphone processing is selected, the first switching end of the second switching switch circuit is connected to the second microphone processing circuit, and the second switching end of the second switching switch circuit is disconnected; when musical instrument processing is selected, the second switching end of the second switching switch circuit is connected to the second musical instrument processing circuit, and the first switching end of the second switching switch circuit is disconnected; the second analog volume adjustment knob circuit is respectively connected to the second microphone processing circuit, the second musical instrument processing circuit and the second operational amplifier circuit, and the second differential comparison circuit is respectively connected to the common end of the second operational amplifier circuit and the channel mode switching switch circuit.

3. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 2, characterized in that: The output signal processing module includes an output mixing circuit, a third operational amplifier circuit, a digital volume adjustment knob circuit, an earphone amplifier circuit, an earphone output circuit, a third analog volume adjustment knob circuit, a fourth operational amplifier circuit and a speaker output circuit; the output mixing circuit is respectively connected to the microphone sound monitoring switch circuit, the internal recording processing module, the third operational amplifier circuit and the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit is respectively connected to the third operational amplifier circuit and the earphone amplifier circuit, and the earphone amplifier circuit is connected to the earphone output circuit; the fourth operational amplifier circuit is respectively connected to the third analog volume adjustment knob circuit and the speaker output circuit.

4. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 3, characterized in that: The internal recording processing module includes an internal amplifier switch control circuit, a fifth operational amplifier circuit, a DSP audio decoding processing circuit and a data transmission interface circuit. The fifth operational amplifier circuit is respectively connected to the output mixing circuit, the internal amplifier switch control circuit and the DSP audio decoding processing circuit. The internal amplifier switch control circuit and the DSP audio decoding processing circuit are both connected to the recording mixing circuit. The DSP audio decoding processing circuit is respectively connected to the data transmission interface circuit and the power supply processing module.

5. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 4, characterized in that: The power supply processing module includes a power supply circuit, a voltage stabilizing circuit and a power switch circuit. The power supply circuit is connected to the power switch circuit and the voltage stabilizing circuit respectively. The voltage stabilizing circuit is connected to the DSP audio decoding processing circuit. The power switch circuit is connected to the data transmission interface circuit.

6. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 5, characterized in that: The channel mode switching and internal recording control system also includes a lighting processing module, which includes a left channel signal level acquisition circuit, a right channel signal level acquisition circuit, a lighting control circuit and multiple groups of RGB lamp beads. The lighting control circuit is respectively connected to the left channel signal level acquisition circuit, the right channel signal level acquisition circuit, the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit, the power switch circuit and the multiple groups of RGB lamp beads. The left channel signal level acquisition circuit is connected to the first differential comparison circuit, and the right channel signal level acquisition circuit is connected to the second differential comparison circuit.

7. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 6, characterized in that: The recording sound card device also includes a housing, the housing being formed by connecting an upper panel, a lower panel, a left panel, a right panel, a front panel, and a rear panel; a first circuit board and a second circuit board are installed in the housing, the first circuit board being installed on the lower panel, and the second circuit board being installed on the front end of the upper panel; The left channel signal input circuit, the first microphone processing circuit, the first musical instrument processing circuit, the first operational amplifier circuit, the first differential comparison circuit, the right channel signal input circuit, the second microphone processing circuit, the second musical instrument processing circuit, the second operational amplifier circuit, the second differential comparison circuit, the output mixing circuit, the third operational amplifier circuit, the headphone amplifier circuit, the headphone output circuit, the fourth operational amplifier circuit, the speaker output circuit, the fifth operational amplifier circuit, the DSP audio decoding processing circuit, the data transmission interface circuit, the power supply circuit, the voltage stabilizing circuit, the power switch circuit, the left channel signal level acquisition circuit and the right channel signal level acquisition circuit are all installed on the first circuit board; The first switching switch circuit, the second switching switch circuit, the channel mode switching switch circuit, the microphone sound monitoring switch circuit, the built-in switch control circuit, the first analog volume adjustment knob circuit, the second analog volume adjustment knob circuit, the third analog volume adjustment knob circuit, the digital volume adjustment knob circuit, the lighting control circuit and multiple groups of RGB lamp beads are installed on the second circuit board.

8. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 7, characterized in that: The front end of the upper panel is an operation interface area, on which a first button switch, a second button switch, a third button switch, a fourth button switch, a fifth button switch, a first rotary switch, a second rotary switch, a third rotary switch, and a fourth rotary switch are provided. The first button switch is connected to the first switching switch circuit, the second button switch is connected to the second switching switch circuit, the third button switch is connected to the built-in switch control circuit, the fourth button switch is connected to the channel mode switching switch circuit, the fifth button switch is connected to the microphone sound monitoring switch circuit, the first rotary switch is connected to the first analog volume adjustment knob circuit, the second rotary switch is connected to the second analog volume adjustment knob circuit, the third rotary switch is connected to the third analog volume adjustment knob circuit, and the fourth rotary switch is connected to the digital volume adjustment knob circuit; light-transmitting areas are provided around the first, second, third, and fourth rotary switches and around the operation interface area, and each light-transmitting area corresponds to the position of a group of RGB lamp beads one by one; The front panel is provided with a left channel input interface, a right channel input interface, two speaker output interfaces and a headphone output interface, the left channel input interface is connected to the left channel signal input circuit, the right channel input interface is connected to the right channel signal input circuit, the speaker output interface is connected to the speaker output circuit, and the headphone output interface is connected to the headphone output circuit; The rear panel is provided with a power switch and a data transmission interface. The power switch is connected to the power switch circuit, and the data transmission interface is connected to the data transmission interface circuit.

9. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 8, characterized in that: The operation interface area is an inclined surface, and the second circuit board is arranged opposite to the inclined surface.

10. The recording sound card device with switching between mono and stereo modes and internal recording function as claimed in claim 7, characterized in that: A plurality of anti-skid pads are installed on the bottom of the lower panel.

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